/* ========================================
   Portfolio Website - Design System
   Color Palette:
   - Primary Dark: #020202
   - Accent Light: #bbc6cf
   - Secondary Blue-Gray: #283340
   ======================================== */

/* === CSS CUSTOM PROPERTIES === */
:root {
    /* Colors */
    --color-bg-primary: #020202;
    --color-bg-secondary: #0a0a0a;
    --color-bg-card: rgba(40, 51, 64, 0.4);
    --color-bg-card-hover: rgba(40, 51, 64, 0.6);
    --color-accent: #bbc6cf;
    --color-accent-dim: rgba(187, 198, 207, 0.7);
    --color-secondary: #283340;
    --color-text-primary: #ffffff;
    --color-text-secondary: #bbc6cf;
    --color-text-muted: #6b7280;
    --color-border: rgba(187, 198, 207, 0.2);
    --color-glow: rgba(187, 198, 207, 0.3);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px var(--color-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: var(--spacing-lg);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Background gradient overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 20% 20%, rgba(40, 51, 64, 0.3) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(40, 51, 64, 0.2) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-text-primary);
}

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

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

/* === TYPOGRAPHY === */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-text-primary);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: 1.25rem;
}

p {
    color: var(--color-text-secondary);
}

/* === LAYOUT === */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.section {
    padding: var(--spacing-4xl) 0;
}

/* === NAVBAR === */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--spacing-md) 0;
    background: rgba(2, 2, 2, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.navbar-logo {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    border: 2px solid var(--color-border);
    object-fit: cover;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.navbar-logo:hover {
    transform: scale(1.1);
    box-shadow: 0 0 15px rgba(187, 198, 207, 0.4);
    border-color: var(--color-accent);
}

.navbar-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.navbar-nav {
    display: flex;
    gap: var(--spacing-xl);
    list-style: none;
}

.navbar-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.navbar-link:hover,
.navbar-link.active {
    color: var(--color-text-primary);
    background: var(--color-bg-card);
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    padding: var(--spacing-sm);
}

.navbar-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* === HERO SECTION === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-glow) 0%, transparent 70%);
    opacity: 0.4;
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-secondary) 0%, #3a4a5c 100%);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 40px var(--color-glow);
}

.btn-secondary {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-card);
    border-color: var(--color-accent);
}

.btn-success {
    background: linear-gradient(135deg, #059669 0%, #10b981 100%);
    color: white;
}

.btn-warning {
    background: linear-gradient(135deg, #d97706 0%, #f59e0b 100%);
    color: #000;
}

.btn-danger {
    background: linear-gradient(135deg, #dc2626 0%, #ef4444 100%);
    color: white;
}

.btn-sm {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1.125rem;
}

/* === CARDS === */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
}

.card:hover {
    background: var(--color-bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-header {
    margin-bottom: var(--spacing-lg);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.card-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--spacing-md);
    color: var(--color-accent);
}

/* === TIER CARDS (Membership) === */
.tier-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    align-items: start;
}

.tier-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    padding: var(--spacing-2xl);
    text-align: center;
    backdrop-filter: blur(10px);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.tier-card:hover {
    background: var(--color-bg-card-hover);
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    border-color: var(--color-accent-dim);
}

.tier-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

.tier-name {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.tier-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-xs);
}

.tier-price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-muted);
}

.tier-expand-btn {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-accent);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    margin: var(--spacing-sm) 0;
    transition: all var(--transition-fast);
}

.tier-expand-btn:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-accent);
}

.tier-card .btn {
    width: 100%;
    margin-top: auto;
}

/* Tier description full HTML styling */
.tier-desc-full {
    text-align: left;
}

.tier-desc-full p {
    margin-bottom: var(--spacing-sm);
}

.tier-desc-full a {
    color: var(--color-accent);
    text-decoration: underline;
}

.tier-desc-full ul,
.tier-desc-full ol {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
}

.tier-desc-full li {
    margin-bottom: var(--spacing-xs);
}

.tier-desc-full strong {
    color: var(--color-text-primary);
}

/* === ABOUT SECTION === */
.about {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
}

.about-content {
    order: 1;
}

.about-image-wrapper {
    order: 2;
    display: flex;
    justify-content: center;
}

.about-image {
    width: 350px;
    height: 350px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 4px solid var(--color-border);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.about-image:hover {
    transform: scale(1.05) rotate(2deg);
    box-shadow: 0 0 25px rgba(187, 198, 207, 0.4);
    border-color: var(--color-accent);
}

.about-title {
    margin-bottom: var(--spacing-lg);
}

.about-text {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
}

/* === PROJECT CARDS === */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.project-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.project-card:hover {
    background: var(--color-bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--color-secondary);
}

.project-content {
    padding: var(--spacing-lg);
}

.project-title {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
}

.project-description {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* === FOOTER === */
.footer {
    padding: var(--spacing-2xl) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
}

.social-links {
    display: flex;
    gap: var(--spacing-lg);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    color: var(--color-accent);
    font-size: 1.25rem;
    transition: all var(--transition-fast);
}

.social-link:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
}

.footer-text {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
    list-style: none;
}

.footer-links a {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-links a:hover {
    color: var(--color-accent);
}

/* === PAGE HEADER === */
.page-header {
    padding: calc(80px + var(--spacing-4xl)) 0 var(--spacing-2xl);
    text-align: center;
}

.page-title {
    margin-bottom: var(--spacing-md);
}

.page-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* === SECTION HEADERS === */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* === TOOL PAGE SPECIFIC === */
.tool-container {
    max-width: 900px;
    margin: 0 auto;
}

.tool-box {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    backdrop-filter: blur(10px);
}

.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.form-input {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-glow);
}

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

.form-divider {
    text-align: center;
    padding: var(--spacing-lg) 0;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.file-upload {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.file-upload:hover {
    border-color: var(--color-accent);
    background: rgba(187, 198, 207, 0.05);
}

.file-upload input {
    display: none;
}

.file-upload-text {
    color: var(--color-text-muted);
}

.file-upload-browse {
    color: var(--color-accent);
    font-weight: 500;
}

/* Terminal Log */
.terminal {
    background: #000;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    font-family: var(--font-mono);
    font-size: 0.875rem;
    color: #00ff00;
    height: 300px;
    overflow-y: auto;
    white-space: pre-wrap;
    margin: var(--spacing-xl) 0;
}

.terminal::-webkit-scrollbar {
    width: 8px;
}

.terminal::-webkit-scrollbar-track {
    background: #111;
}

.terminal::-webkit-scrollbar-thumb {
    background: var(--color-secondary);
    border-radius: 4px;
}

/* Control Panel */
.control-panel {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.control-panel.hidden {
    display: none;
}

/* Download Area */
.download-area {
    text-align: center;
    padding: var(--spacing-xl);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
}

.download-area.hidden {
    display: none;
}

.download-title {
    font-size: 1.25rem;
    color: #10b981;
    margin-bottom: var(--spacing-md);
}

/* === UTILITY CLASSES === */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-sm {
    margin-top: var(--spacing-sm);
}

.mt-md {
    margin-top: var(--spacing-md);
}

.mt-lg {
    margin-top: var(--spacing-lg);
}

.mt-xl {
    margin-top: var(--spacing-xl);
}

.mb-sm {
    margin-bottom: var(--spacing-sm);
}

.mb-md {
    margin-bottom: var(--spacing-md);
}

.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mb-xl {
    margin-bottom: var(--spacing-xl);
}

.hidden {
    display: none !important;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    :root {
        --container-padding: var(--spacing-md);
    }

    .navbar-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(2, 2, 2, 0.95);
        padding: var(--spacing-lg);
        gap: var(--spacing-sm);
        display: none;
        border-bottom: 1px solid var(--color-border);
    }

    .navbar-nav.active {
        display: flex;
    }

    .navbar-toggle {
        display: flex;
    }

    .about {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .about-content {
        order: 2;
        text-align: center;
    }

    .about-image-wrapper {
        order: 1;
    }

    .about-image {
        width: 250px;
        height: 250px;
    }

    /* Tablet Slideshow for Tiers - 3 visible */
    .tier-cards {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        gap: var(--spacing-md);
        padding-bottom: var(--spacing-md);
        -webkit-overflow-scrolling: touch;
        align-items: flex-start;
    }

    .tier-cards::-webkit-scrollbar {
        height: 6px;
    }

    .tier-cards::-webkit-scrollbar-track {
        background: var(--color-bg-secondary);
        border-radius: 3px;
    }

    .tier-cards::-webkit-scrollbar-thumb {
        background: var(--color-secondary);
        border-radius: 3px;
    }

    .tier-card {
        flex: 0 0 calc(33.333% - var(--spacing-md));
        scroll-snap-align: start;
        min-width: 220px;
        align-self: flex-start;
    }

    .control-panel {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .btn-lg {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 1rem;
    }

    /* Mobile Slideshow for Tiers */
    .tier-cards {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        gap: var(--spacing-md);
        padding-bottom: var(--spacing-md);
        -webkit-overflow-scrolling: touch;
        align-items: flex-start;
    }

    .tier-cards::-webkit-scrollbar {
        height: 6px;
    }

    .tier-cards::-webkit-scrollbar-track {
        background: var(--color-bg-secondary);
        border-radius: 3px;
    }

    .tier-cards::-webkit-scrollbar-thumb {
        background: var(--color-secondary);
        border-radius: 3px;
    }

    .tier-card {
        flex: 0 0 85%;
        scroll-snap-align: center;
        min-width: 280px;
        align-self: flex-start;
    }
}

/* === COLLECTIONS GRID === */
.collections-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 20px;
}

.collection-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    text-decoration: none;
    color: var(--color-text-primary);
    background: var(--color-bg-secondary);
    transition: transform 0.2s;
    display: block;
    border: 1px solid var(--color-border);
}

.collection-card:hover {
    transform: translateY(-5px);
}

.card-cover {
    width: 100%;
    aspect-ratio: 2 / 3;
    height: auto;
    background-size: cover;
    background-position: top center;
    position: relative;
    background-color: var(--color-bg-tertiary);
    /* fallback */
}

.chapter-badge {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
}

.card-info {
    padding: 15px;
}

.card-info h3 {
    margin: 0 0 5px 0;
    font-size: 1.1rem;
    color: var(--color-text-primary);
}

.read-more {
    color: var(--color-accent);
    font-weight: bold;
    font-size: 0.9rem;
    margin: 0;
}

/* === TOOL HIGHLIGHT SECTION === */
.tool-highlight {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    position: relative;
    overflow: hidden;
}

.tool-highlight::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    opacity: 0.5;
}

.tool-content {
    flex: 1;
}

.tool-icon {
    font-size: 5rem;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 0 20px rgba(187, 198, 207, 0.2));
}

@media (max-width: 768px) {
    .tool-highlight {
        flex-direction: column-reverse;
        text-align: center;
    }

    .tool-content .section-title {
        text-align: center !important;
    }

    .tool-content p {
        margin-inline: auto;
    }
}