/* =========================================
   ASERELA - AI-Powered Mineral Discovery
   Comprehensive Design System Implementation
   ========================================= */

/* =========================================
   1. CSS VARIABLES & DESIGN TOKENS
   ========================================= */
:root {
    /* Primary Colors */
    --color-forest-deep: #1A2E1A;
    --color-forest-mid: #2D4A2D;
    --color-forest-light: #3D5C3D;
    --color-cream: #FAFAF8;
    --color-white: #FFFFFF;

    /* Text Colors */
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #6B6B6B;
    --color-text-tertiary: #9A9A9A;
    --color-text-inverse: #FAFAF8;
    --color-text-inverse-muted: rgba(250, 250, 248, 0.7);

    /* Accent Colors */
    --color-accent-copper: #B87333;
    --color-accent-mineral: #4A90A4;
    --color-accent-sage: #9CAF88;

    /* Border Colors */
    --color-border-light: #E5E5E3;
    --color-border-dark: rgba(250, 250, 248, 0.15);

    /* Gradients */
    --gradient-forest: linear-gradient(180deg, #1A2E1A 0%, #0D170D 100%);
    --gradient-cream-fade: linear-gradient(180deg, #FAFAF8 0%, #F0F0EE 100%);
    --gradient-overlay: linear-gradient(180deg, transparent 0%, rgba(26, 46, 26, 0.7) 100%);

    /* Typography */
    --font-display: "Bebas Neue", "Oswald", "Impact", sans-serif;
    --font-heading: "Playfair Display", Georgia, serif;
    --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", "Consolas", monospace;

    /* Font Sizes */
    --text-xs: 0.625rem;
    --text-sm: 0.75rem;
    --text-base: 0.875rem;
    --text-md: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 2rem;
    --text-4xl: 2.5rem;
    --text-5xl: 3.5rem;
    --text-6xl: 5rem;
    --text-7xl: 7rem;
    --text-8xl: 10rem;

    /* Font Weights */
    --font-light: 300;
    --font-regular: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

    /* Line Heights */
    --leading-none: 1;
    --leading-tight: 1.1;
    --leading-snug: 1.25;
    --leading-normal: 1.5;
    --leading-relaxed: 1.65;
    --leading-loose: 1.8;

    /* Letter Spacing */
    --tracking-tighter: -0.03em;
    --tracking-tight: -0.015em;
    --tracking-normal: 0;
    --tracking-wide: 0.05em;
    --tracking-wider: 0.1em;
    --tracking-widest: 0.2em;

    /* Spacing */
    --space-0: 0;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;
    --space-40: 10rem;
    --space-48: 12rem;

    /* Section Spacing */
    --section-padding-sm: var(--space-16);
    --section-padding-md: var(--space-24);
    --section-padding-lg: var(--space-32);

    /* Container */
    --container-padding: var(--space-6);
    --container-max: 1440px;
    --container-narrow: 960px;
    --container-text: 680px;

    /* Shadows */
    --shadow-none: none;
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
    --shadow-forest: 0 8px 24px rgba(26, 46, 26, 0.4);

    /* Border Radius */
    --radius-none: 0;
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
    --radius-full: 9999px;

    /* Transitions */
    --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-in: cubic-bezier(0.4, 0, 1, 1);
    --ease-out: cubic-bezier(0, 0, 0.2, 1);
    --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --duration-fast: 150ms;
    --duration-normal: 300ms;
    --duration-slow: 500ms;
    --duration-slower: 700ms;

    /* Breakpoints */
    --breakpoint-sm: 640px;
    --breakpoint-md: 768px;
    --breakpoint-lg: 1024px;
    --breakpoint-xl: 1280px;
    --breakpoint-2xl: 1536px;
}

/* =========================================
   2. CSS RESET & BASE STYLES
   ========================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--font-regular);
    line-height: var(--leading-relaxed);
    color: var(--color-text-primary);
    background-color: var(--color-cream);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-default);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

address {
    font-style: normal;
}

/* =========================================
   3. UTILITY CLASSES
   ========================================= */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.text-label {
    display: block;
    font-family: var(--font-body);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    line-height: var(--leading-normal);
    letter-spacing: var(--tracking-widest);
    text-transform: uppercase;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.text-label-light {
    color: var(--color-text-inverse-muted);
}

/* =========================================
   4. NAVIGATION
   ========================================= */
.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) var(--space-6);
    background: var(--color-cream);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border-light);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-display);
    font-size: var(--text-lg);
    font-weight: var(--font-bold);
    letter-spacing: var(--tracking-tight);
    text-transform: uppercase;
    color: var(--color-text-primary);
    text-decoration: none;
}

.logo-icon {
    color: var(--color-forest-deep);
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-links {
    display: flex;
    gap: var(--space-8);
}

.nav-link {
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--font-regular);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-default);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-text-primary);
    transition: width var(--duration-normal) var(--ease-default);
}

.nav-link:hover {
    color: var(--color-text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    z-index: 1001;
}

.nav-toggle-line {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--duration-normal) var(--ease-default);
}

/* =========================================
   5. HERO SECTION
   ========================================= */
.hero {
    padding: var(--space-48) var(--space-6) var(--space-24);
    background: var(--color-cream);
    text-align: center;
    margin-top: 60px;
}

.hero-content {
    max-width: var(--container-max);
    margin: 0 auto;
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(4rem, 15vw, var(--text-8xl));
    font-weight: var(--font-bold);
    line-height: var(--leading-none);
    letter-spacing: var(--tracking-tight);
    text-transform: uppercase;
    color: var(--color-text-primary);
    margin: 0;
}

/* =========================================
   6. CONTENT GRID SECTION
   ========================================= */
.content-grid {
    padding: var(--space-8) 0 var(--space-16);
    background: var(--color-cream);
}

.grid-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr 1.2fr;
    gap: var(--space-8);
    padding-bottom: var(--space-12);
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: var(--space-12);
}

.grid-layout-second {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.grid-column {
    display: flex;
    flex-direction: column;
}

/* Info Block */
.info-block {
    display: flex;
    flex-direction: column;
}

.info-content {
    margin-top: var(--space-4);
}

.info-text {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.info-details {
    margin-top: var(--space-6);
}

.info-detail {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

.detail-label {
    display: block;
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-1);
}

/* News Block */
.news-block {
    display: flex;
    flex-direction: column;
}

.news-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.news-header .text-label {
    margin-bottom: 0;
}

.news-nav-link {
    display: flex;
    gap: var(--space-4);
    color: var(--color-text-tertiary);
}

.news-item {
    display: flex;
    flex-direction: column;
}

.news-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: var(--font-regular);
    line-height: var(--leading-snug);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.news-excerpt {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
}

.news-date {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.news-link {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.news-link:hover {
    text-decoration-thickness: 2px;
}

/* Project Card */
.project-card {
    margin-top: var(--space-4);
}

.project-image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    margin-bottom: var(--space-4);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-default);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-info {
    display: flex;
    flex-direction: column;
}

.project-label {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-2);
}

.project-title {
    font-family: var(--font-body);
    font-size: var(--text-md);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.project-description {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
}

/* Highlights */
.highlights-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    margin-top: var(--space-4);
}

.highlight-item {
    display: flex;
    flex-direction: column;
}

.highlight-number {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-none);
    color: var(--color-forest-deep);
    margin-bottom: var(--space-2);
}

.highlight-label {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
}

/* Update Block */
.update-block {
    margin-top: var(--space-4);
}

.update-image {
    position: relative;
    aspect-ratio: 3/2;
    overflow: hidden;
    margin-bottom: var(--space-4);
}

.update-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-default);
}

.update-block:hover .update-image img {
    transform: scale(1.05);
}

.update-content {
    display: flex;
    flex-direction: column;
}

.update-title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: var(--font-regular);
    line-height: var(--leading-snug);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.update-description {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.update-link {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.update-link:hover {
    text-decoration-thickness: 2px;
}

/* Resources */
.resources-content {
    margin-top: var(--space-4);
}

.resource-intro {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.resource-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.resource-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--color-border-light);
}

.resource-type {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
}

.resource-title {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
}

/* =========================================
   7. MISSION SECTION
   ========================================= */
.mission-section {
    padding: var(--space-32) 0;
    background: var(--color-cream);
}

.mission-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
    text-align: center;
}

.mission-headline {
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 3.5vw, var(--text-4xl));
    font-weight: var(--font-regular);
    line-height: var(--leading-tight);
    letter-spacing: var(--tracking-tight);
    color: var(--color-text-primary);
    margin-bottom: var(--space-10);
}

.mission-body {
    max-width: var(--container-text);
    margin: 0 auto var(--space-10);
}

.mission-text {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.mission-text:last-child {
    margin-bottom: 0;
}

.mission-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
}

.mission-cta:hover {
    text-decoration-thickness: 2px;
}

.arrow-down {
    transition: transform var(--duration-fast) var(--ease-default);
}

.mission-cta:hover .arrow-down {
    transform: translateY(3px);
}

/* =========================================
   8. MINERALS SECTION (DARK)
   ========================================= */
.minerals-section {
    padding: var(--space-24) 0;
    background: var(--gradient-forest);
    color: var(--color-text-inverse);
}

.minerals-layout {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-16);
}

.minerals-list-container {
    display: flex;
    flex-direction: column;
}

.minerals-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.minerals-list-item {
    font-family: var(--font-heading);
    font-size: clamp(1rem, 2vw, var(--text-xl));
    font-weight: var(--font-regular);
    line-height: var(--leading-loose);
    color: var(--color-text-inverse);
    transition: color var(--duration-fast) var(--ease-default);
    cursor: pointer;
}

.minerals-list-item:hover {
    color: var(--color-accent-sage);
}

.minerals-visual-container {
    display: flex;
    flex-direction: column;
}

.visual-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-6);
}

.visual-filter {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.filter-label {
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--color-text-inverse-muted);
}

.filter-btn {
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    color: var(--color-text-inverse-muted);
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border-dark);
    transition: all var(--duration-fast) var(--ease-default);
}

.filter-btn:hover,
.filter-btn-active {
    color: var(--color-text-inverse);
    border-color: var(--color-text-inverse);
}

.visual-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-4);
}

.visual-item {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
}

.visual-item-large {
    grid-column: span 2;
    grid-row: span 2;
    aspect-ratio: auto;
}

.visual-item-wide {
    grid-column: span 2;
    aspect-ratio: 2/1;
}

.visual-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-default);
}

.visual-item:hover img {
    transform: scale(1.05);
}

.visual-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-4);
    background: linear-gradient(0deg, rgba(0,0,0,0.7) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--duration-normal) var(--ease-default);
}

.visual-item:hover .visual-overlay {
    opacity: 1;
}

.visual-caption {
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
    color: var(--color-text-inverse);
}

/* =========================================
   9. FEATURED IMAGE SECTION
   ========================================= */
.featured-image-section {
    position: relative;
    height: 60vh;
    min-height: 400px;
    max-height: 700px;
    overflow: hidden;
}

.featured-image-container {
    position: relative;
    width: 100%;
    height: 100%;
}

.featured-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.featured-image-overlay {
    position: absolute;
    inset: 0;
    background: var(--gradient-overlay);
    display: flex;
    align-items: flex-end;
    padding: var(--space-12);
}

.featured-image-content {
    max-width: 600px;
}

.featured-text {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: var(--font-regular);
    line-height: var(--leading-snug);
    color: var(--color-text-inverse);
}

/* =========================================
   10. QUOTE SECTION
   ========================================= */
.quote-section {
    padding: var(--space-32) 0;
    background: var(--color-forest-deep);
}

.quote-content {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.quote-text {
    font-family: var(--font-heading);
    font-size: clamp(1.25rem, 2.5vw, var(--text-2xl));
    font-weight: var(--font-regular);
    font-style: italic;
    line-height: var(--leading-relaxed);
    color: var(--color-text-inverse);
}

/* =========================================
   11. TECHNOLOGY SECTION
   ========================================= */
.technology-section {
    padding: var(--space-24) 0;
    background: var(--color-cream);
}

.technology-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-16);
    margin-bottom: var(--space-16);
}

.technology-intro {
    display: flex;
    flex-direction: column;
}

.technology-headline {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: var(--font-regular);
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
}

.technology-description {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

.technology-capabilities {
    display: flex;
    flex-direction: column;
}

.capabilities-list {
    display: flex;
    flex-direction: column;
    margin-top: var(--space-4);
}

.capability-item {
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.capability-item:first-child {
    border-top: 1px solid var(--color-border-light);
}

.capability-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.capability-title {
    font-family: var(--font-body);
    font-size: var(--text-md);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
}

.capability-toggle {
    font-size: var(--text-lg);
    color: var(--color-text-tertiary);
    transition: transform var(--duration-fast) var(--ease-default);
}

.capability-item:hover .capability-toggle {
    color: var(--color-text-primary);
}

.capability-description {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-top: var(--space-4);
    padding-right: var(--space-8);
}

.technology-cta-block {
    padding: var(--space-12);
    background: var(--color-forest-deep);
}

.cta-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.cta-text {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-text-inverse-muted);
    margin-bottom: var(--space-8);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-8);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    letter-spacing: var(--tracking-wide);
    text-transform: uppercase;
    text-decoration: none;
    border: 1px solid transparent;
    border-radius: 0;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-default);
}

.btn-primary {
    background: var(--color-text-inverse);
    color: var(--color-forest-deep);
    border-color: var(--color-text-inverse);
}

.btn-primary:hover {
    background: transparent;
    color: var(--color-text-inverse);
}

.btn-arrow {
    transition: transform var(--duration-fast) var(--ease-default);
}

.btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* =========================================
   12. PLATFORM SECTION
   ========================================= */
.platform-section {
    padding: var(--space-24) 0;
    background: var(--color-white);
}

.platform-header {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-16);
    text-align: center;
}

.platform-headline {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: var(--font-regular);
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
    margin-top: var(--space-4);
}

.platform-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-20);
}

.platform-feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.platform-feature-reverse {
    direction: rtl;
}

.platform-feature-reverse > * {
    direction: ltr;
}

.feature-visual {
    position: relative;
    aspect-ratio: 3/2;
    overflow: hidden;
}

.feature-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--duration-slow) var(--ease-default);
}

.platform-feature:hover .feature-visual img {
    transform: scale(1.03);
}

.feature-content {
    display: flex;
    flex-direction: column;
}

.feature-number {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-forest-deep);
    opacity: 0.3;
    margin-bottom: var(--space-4);
}

.feature-title {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: var(--font-medium);
    line-height: var(--leading-snug);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.feature-description {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.feature-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.feature-details li {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    padding-left: var(--space-4);
    position: relative;
}

.feature-details li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--color-forest-deep);
    border-radius: 50%;
}

/* =========================================
   13. IMPACT SECTION
   ========================================= */
.impact-section {
    padding: var(--space-24) 0;
    background: var(--color-cream);
}

.impact-header {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-16);
    text-align: center;
}

.impact-headline {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: var(--font-regular);
    line-height: var(--leading-snug);
    color: var(--color-text-primary);
    margin-top: var(--space-4);
}

.impact-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
}

.impact-stat {
    display: flex;
    flex-direction: column;
    padding: var(--space-8);
    border: 1px solid var(--color-border-light);
    background: var(--color-white);
}

.stat-number {
    font-family: var(--font-display);
    font-size: var(--text-6xl);
    font-weight: var(--font-bold);
    line-height: var(--leading-none);
    color: var(--color-forest-deep);
    margin-bottom: var(--space-4);
}

.stat-label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.stat-description {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
}

/* =========================================
   14. CHALLENGE SECTION
   ========================================= */
.challenge-section {
    padding: var(--space-24) 0;
    background: var(--color-forest-deep);
    color: var(--color-text-inverse);
}

.challenge-layout {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--space-16);
    align-items: start;
}

.challenge-content {
    display: flex;
    flex-direction: column;
}

.challenge-headline {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: var(--font-regular);
    line-height: var(--leading-tight);
    color: var(--color-text-inverse);
    margin-bottom: var(--space-8);
}

.challenge-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.challenge-text {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-text-inverse-muted);
}

.challenge-visual {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.challenge-image {
    position: relative;
    aspect-ratio: 3/4;
    overflow: hidden;
}

.challenge-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.challenge-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.challenge-stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.challenge-stat-value {
    font-family: var(--font-display);
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--color-accent-sage);
}

.challenge-stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-inverse-muted);
}

/* =========================================
   15. SOLUTION SECTION
   ========================================= */
.solution-section {
    padding: var(--space-24) 0;
    background: var(--color-cream);
}

.solution-header {
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-12);
    text-align: center;
}

.solution-headline {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: var(--font-regular);
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
    margin-top: var(--space-4);
}

.solution-content {
    max-width: 1200px;
    margin: 0 auto;
}

.solution-intro {
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    text-align: center;
    max-width: var(--container-narrow);
    margin: 0 auto var(--space-16);
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-12);
}

.solution-item {
    display: flex;
    flex-direction: column;
    padding: var(--space-8);
    border: 1px solid var(--color-border-light);
    background: var(--color-white);
}

.solution-icon {
    color: var(--color-forest-deep);
    margin-bottom: var(--space-6);
}

.solution-title {
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: var(--font-medium);
    line-height: var(--leading-snug);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.solution-description {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
}

/* =========================================
   16. VALIDATION SECTION
   ========================================= */
.validation-section {
    padding: var(--space-24) 0;
    background: var(--color-white);
    border-top: 1px solid var(--color-border-light);
}

.validation-content {
    max-width: var(--container-narrow);
    margin: 0 auto;
}

.validation-headline {
    font-family: var(--font-heading);
    font-size: var(--text-3xl);
    font-weight: var(--font-regular);
    line-height: var(--leading-tight);
    color: var(--color-text-primary);
    margin-bottom: var(--space-8);
}

.validation-body {
    margin-bottom: var(--space-12);
}

.validation-text {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-6);
}

.validation-text:last-child {
    margin-bottom: 0;
}

.validation-highlight {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
    padding: var(--space-8);
    background: var(--color-forest-deep);
}

.validation-stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.validation-stat-label {
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-widest);
    text-transform: uppercase;
    color: var(--color-text-inverse-muted);
}

.validation-stat-value {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: var(--font-medium);
    color: var(--color-text-inverse);
}

/* =========================================
   17. CONTACT SECTION
   ========================================= */
.contact-section {
    padding: var(--space-24) 0;
    background: var(--color-cream);
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--space-16);
}

.contact-info {
    display: flex;
    flex-direction: column;
}

.contact-headline {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: var(--font-regular);
    line-height: var(--leading-snug);
    color: var(--color-text-primary);
    margin-bottom: var(--space-6);
}

.contact-description {
    font-size: var(--text-base);
    line-height: var(--leading-relaxed);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-10);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.contact-detail {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.contact-detail-label {
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-widest);
    text-transform: uppercase;
    color: var(--color-text-tertiary);
}

.contact-detail-value {
    font-size: var(--text-md);
    color: var(--color-text-primary);
    text-decoration: none;
}

.contact-detail-value:hover {
    text-decoration: underline;
}

.contact-address {
    line-height: var(--leading-relaxed);
}

.contact-address:hover {
    text-decoration: none;
}

/* Contact Form */
.contact-form-container {
    padding: var(--space-10);
    background: var(--color-white);
    border: 1px solid var(--color-border-light);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.form-label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
}

.form-input {
    width: 100%;
    padding: var(--space-4);
    font-family: var(--font-body);
    font-size: var(--text-base);
    color: var(--color-text-primary);
    background: var(--color-cream);
    border: 1px solid var(--color-border-light);
    border-radius: 0;
    outline: none;
    transition: border-color var(--duration-fast) var(--ease-default);
}

.form-input::placeholder {
    color: var(--color-text-tertiary);
}

.form-input:focus {
    border-color: var(--color-text-primary);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236B6B6B' d='M6 8L2 4h8z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: var(--space-10);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.btn-submit {
    align-self: flex-start;
    margin-top: var(--space-4);
    background: var(--color-forest-deep);
    color: var(--color-text-inverse);
    border-color: var(--color-forest-deep);
}

.btn-submit:hover {
    background: var(--color-forest-mid);
    border-color: var(--color-forest-mid);
}

/* =========================================
   18. FOOTER
   ========================================= */
.footer {
    padding: var(--space-16) 0 var(--space-8);
    background: var(--color-cream);
    border-top: 1px solid var(--color-border-light);
}

.footer-content {
    margin-bottom: var(--space-16);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: var(--space-12);
    padding-bottom: var(--space-12);
    border-bottom: 1px solid var(--color-border-light);
    margin-bottom: var(--space-8);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.footer-logo-link {
    display: inline-flex;
    color: var(--color-forest-deep);
}

.footer-tagline {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    max-width: 280px;
}

.footer-nav {
    display: flex;
    flex-direction: column;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer-link {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    transition: color var(--duration-fast) var(--ease-default);
}

.footer-link:hover {
    color: var(--color-text-primary);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-contact-label {
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-widest);
    text-transform: uppercase;
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-2);
}

.footer-contact-email,
.footer-contact-phone {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.footer-contact-email:hover,
.footer-contact-phone:hover {
    color: var(--color-text-primary);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-legal,
.footer-address {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

.footer-display {
    text-align: center;
    padding-top: var(--space-12);
}

.footer-display-text {
    font-family: var(--font-display);
    font-size: clamp(4rem, 12vw, var(--text-8xl));
    font-weight: var(--font-bold);
    line-height: var(--leading-none);
    letter-spacing: var(--tracking-tight);
    text-transform: uppercase;
    color: var(--color-text-primary);
    opacity: 0.08;
}

/* =========================================
   19. ANIMATIONS
   ========================================= */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-fade-in {
    animation: fadeIn var(--duration-slow) var(--ease-out) forwards;
}

.animate-slide-left {
    animation: slideInLeft var(--duration-slow) var(--ease-out) forwards;
}

.animate-slide-right {
    animation: slideInRight var(--duration-slow) var(--ease-out) forwards;
}

/* Scroll Reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--duration-slower) var(--ease-out),
                transform var(--duration-slower) var(--ease-out);
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger Animation */
.stagger-children > *:nth-child(1) { transition-delay: 0ms; }
.stagger-children > *:nth-child(2) { transition-delay: 100ms; }
.stagger-children > *:nth-child(3) { transition-delay: 200ms; }
.stagger-children > *:nth-child(4) { transition-delay: 300ms; }
.stagger-children > *:nth-child(5) { transition-delay: 400ms; }
.stagger-children > *:nth-child(6) { transition-delay: 500ms; }

/* =========================================
   20. RESPONSIVE STYLES
   ========================================= */

/* Large Screens */
@media (max-width: 1280px) {
    :root {
        --text-8xl: 8rem;
        --text-7xl: 6rem;
        --text-6xl: 4rem;
    }
}

/* Medium-Large Screens */
@media (max-width: 1024px) {
    :root {
        --section-padding-sm: var(--space-12);
        --section-padding-md: var(--space-16);
        --section-padding-lg: var(--space-20);
    }

    .grid-layout {
        grid-template-columns: 1fr 1fr;
    }

    .grid-column-info {
        grid-column: span 2;
    }

    .grid-layout-second {
        grid-template-columns: 1fr 1fr;
    }

    .minerals-layout {
        grid-template-columns: 1fr 1.5fr;
        gap: var(--space-8);
    }

    .technology-layout {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }

    .platform-feature {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .platform-feature-reverse {
        direction: ltr;
    }

    .feature-visual {
        order: -1;
    }

    .impact-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .challenge-layout {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }

    .challenge-visual {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: var(--space-8);
    }

    .challenge-image {
        aspect-ratio: 1;
    }

    .solution-grid {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .validation-highlight {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }

    .footer-main {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: span 2;
        margin-bottom: var(--space-8);
    }
}

/* Tablets */
@media (max-width: 768px) {
    :root {
        --text-8xl: 5rem;
        --text-7xl: 4rem;
        --text-6xl: 3rem;
        --text-5xl: 2.5rem;
        --text-4xl: 2rem;
        --container-padding: var(--space-4);
    }

    .nav-links {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: var(--space-8);
        background: var(--color-cream);
        transform: translateX(-100%);
        transition: transform var(--duration-normal) var(--ease-default);
        z-index: 999;
    }

    .nav-links.open {
        transform: translateX(0);
    }

    .nav-link {
        font-size: var(--text-2xl);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .nav-toggle-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active .nav-toggle-line:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .nav-toggle-line:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: var(--space-32) var(--space-4) var(--space-16);
    }

    .hero-title {
        font-size: clamp(3rem, 18vw, 6rem);
    }

    .grid-layout {
        grid-template-columns: 1fr;
        gap: var(--space-10);
    }

    .grid-column-info {
        grid-column: span 1;
    }

    .grid-layout-second {
        grid-template-columns: 1fr;
    }

    .minerals-layout {
        grid-template-columns: 1fr;
        gap: var(--space-12);
    }

    .visual-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .visual-item-large {
        grid-column: span 2;
        grid-row: span 1;
        aspect-ratio: 16/9;
    }

    .visual-item-wide {
        grid-column: span 2;
    }

    .visual-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-4);
    }

    .visual-filter {
        flex-wrap: wrap;
    }

    .featured-image-section {
        height: 50vh;
        min-height: 300px;
    }

    .featured-image-overlay {
        padding: var(--space-6);
    }

    .impact-stats {
        grid-template-columns: 1fr;
    }

    .challenge-visual {
        grid-template-columns: 1fr;
    }

    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-brand {
        grid-column: span 1;
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--space-2);
        text-align: center;
    }

    .footer-display-text {
        font-size: clamp(3rem, 15vw, 5rem);
    }
}

/* Mobile */
@media (max-width: 480px) {
    :root {
        --text-8xl: 3.5rem;
        --text-7xl: 3rem;
        --text-6xl: 2.5rem;
        --text-5xl: 2rem;
        --text-4xl: 1.75rem;
        --text-3xl: 1.5rem;
    }

    .hero {
        padding: var(--space-24) var(--space-4) var(--space-12);
    }

    .content-grid {
        padding: var(--space-6) 0 var(--space-12);
    }

    .mission-section {
        padding: var(--space-16) 0;
    }

    .minerals-section {
        padding: var(--space-16) 0;
    }

    .visual-grid {
        grid-template-columns: 1fr;
    }

    .visual-item-large,
    .visual-item-wide {
        grid-column: span 1;
    }

    .quote-section {
        padding: var(--space-16) 0;
    }

    .technology-section {
        padding: var(--space-16) 0;
    }

    .technology-cta-block {
        padding: var(--space-8);
    }

    .platform-section {
        padding: var(--space-16) 0;
    }

    .impact-section {
        padding: var(--space-16) 0;
    }

    .impact-stat {
        padding: var(--space-6);
    }

    .stat-number {
        font-size: var(--text-5xl);
    }

    .challenge-section {
        padding: var(--space-16) 0;
    }

    .solution-section {
        padding: var(--space-16) 0;
    }

    .solution-item {
        padding: var(--space-6);
    }

    .validation-section {
        padding: var(--space-16) 0;
    }

    .contact-section {
        padding: var(--space-16) 0;
    }

    .contact-form-container {
        padding: var(--space-6);
    }

    .footer {
        padding: var(--space-12) 0 var(--space-6);
    }

    .minerals-list-item {
        font-size: var(--text-lg);
    }

    .highlight-number {
        font-size: var(--text-3xl);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    .nav,
    .nav-toggle,
    .contact-form-container,
    .visual-filter {
        display: none;
    }

    body {
        font-size: 12pt;
        color: #000;
        background: #fff;
    }

    .hero-title,
    .footer-display-text {
        font-size: 36pt;
    }

    section {
        page-break-inside: avoid;
    }
}