/* ===================================
   CSS VARIABLES & DESIGN TOKENS
   Following the Chris O. Williams Design System
   =================================== */
:root {
    /* Orange Family */
    --orange-50: #FFF5F2;
    --orange-100: #FFE4DC;
    --signal-orange: #E85A33;
    --orange-light: #FF7F5C;
    --orange-dark: #C74929;

    /* Teal Family */
    --teal-50: #F0F9F8;
    --teal-100: #CCEDE9;
    --teal: #2A9D8F;
    --teal-light: #3FB8AC;
    --teal-dark: #1F7A72;

    /* Ink & Neutral Family */
    --ink-900: #0c1729;
    --ink-700: #1a2942;
    --slate-600: #455468;
    --slate-400: #7b8794;
    --slate-200: #cbd2d9;
    --slate-100: #e8ecf0;
    --warm-white: #FDFCFB;
    --white: #FFFFFF;

    /* Semantic Colors - Primary Actions */
    --color-primary: var(--signal-orange);
    --color-primary-hover: var(--orange-light);
    --color-primary-active: var(--orange-dark);

    /* Semantic Colors - Secondary Actions */
    --color-secondary: var(--teal);
    --color-secondary-hover: var(--teal-light);
    --color-secondary-active: var(--teal-dark);

    /* Semantic Colors - Text Hierarchy */
    --color-text: var(--white);
    --color-text-secondary: var(--slate-400);
    --color-text-muted: var(--slate-600);

    /* Semantic Colors - Backgrounds (Dark Theme for Bio Site) */
    --color-bg: var(--ink-900);
    --color-surface: var(--ink-700);
    --color-border: var(--slate-600);

    /* Legacy compatibility */
    --color-accent: var(--color-primary);
    --color-accent-secondary: var(--color-secondary);

    --font-display: 'Fraunces', serif;
    --font-body: 'DM Sans', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    --transition-smooth: 0.4s cubic-bezier(0.23, 1, 0.32, 1);
    --transition-snap: 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: linear-gradient(135deg, var(--ink-900) 0%, var(--ink-700) 100%);
    color: var(--color-text);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
    cursor: default;
}

/* ===================================
   GRAIN TEXTURE OVERLAY
   =================================== */
.grain {
    position: fixed;
    top: -50%;
    left: -50%;
    right: -50%;
    bottom: -50%;
    width: 200%;
    height: 200vh;
    background: transparent url('data:image/svg+xml,%3Csvg viewBox="0 0 256 256" xmlns="http://www.w3.org/2000/svg"%3E%3Cfilter id="noiseFilter"%3E%3CfeTurbulence type="fractalNoise" baseFrequency="4" numOctaves="3" stitchTiles="stitch"/%3E%3C/filter%3E%3Crect width="100%25" height="100%25" filter="url(%23noiseFilter)" opacity="0.05"/%3E%3C/svg%3E') repeat;
    opacity: 0.6;
    pointer-events: none;
    z-index: 1;
    animation: grain 8s steps(10) infinite;
}

@keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -10%); }
    20% { transform: translate(-15%, 5%); }
    30% { transform: translate(7%, -25%); }
    40% { transform: translate(-5%, 25%); }
    50% { transform: translate(-15%, 10%); }
    60% { transform: translate(15%, 0%); }
    70% { transform: translate(0%, 15%); }
    80% { transform: translate(3%, 35%); }
    90% { transform: translate(-10%, 10%); }
}

/* ===================================
   CONTAINER & LAYOUT
   =================================== */
.container {
    position: relative;
    z-index: 2;
    max-width: 480px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===================================
   HERO SECTION
   =================================== */
.hero {
    margin-bottom: var(--spacing-2xl);
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) backwards;
}

.name {
    font-family: var(--font-display);
    font-size: clamp(3.5rem, 15vw, 5.5rem);
    font-weight: 800;
    line-height: 0.9;
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-md);
    display: flex;
    flex-direction: column;
}

.name-line {
    display: block;
    font-style: italic;
}

.name-line:first-child {
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) backwards;
}

.name-line:last-child {
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) 0.1s backwards;
    color: var(--color-accent);
}

.tagline {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    font-style: italic;
    letter-spacing: 0.01em;
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) 0.2s backwards;
    padding-left: 0.25rem;
}

/* ===================================
   LINKS SECTION
   =================================== */
.links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: auto;
}

.link-card {
    display: grid;
    grid-template-columns: 2.5rem 1fr 2rem;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-md);
    background: linear-gradient(135deg,
        var(--ink-700) 0%,
        rgba(26, 41, 66, 0.95) 100%);
    border: 1px solid var(--color-border);
    text-decoration: none;
    color: var(--color-text);
    position: relative;
    transition: all var(--transition-smooth);
    overflow: hidden;
    animation: fadeInUp 0.6s cubic-bezier(0.23, 1, 0.32, 1) backwards;
    backdrop-filter: blur(10px);
}

.link-card:nth-child(1) { animation-delay: 0.3s; }
.link-card:nth-child(2) { animation-delay: 0.4s; }
.link-card:nth-child(3) { animation-delay: 0.5s; }
.link-card:nth-child(4) { animation-delay: 0.6s; }
.link-card:nth-child(5) { animation-delay: 0.7s; }

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg,
        var(--color-primary) 0%,
        var(--color-primary-hover) 50%,
        rgba(232, 90, 51, 0.2) 100%);
    transition: width var(--transition-smooth);
    z-index: 0;
}

.link-card:hover::before,
.link-card:focus::before {
    width: 100%;
}

.link-card:hover,
.link-card:focus {
    border-color: var(--color-primary-hover);
    transform: translateX(8px);
    box-shadow: 0 8px 24px rgba(232, 90, 51, 0.15),
                0 2px 8px rgba(42, 157, 143, 0.1);
}

.link-card:active {
    transform: translateX(4px) scale(0.98);
    border-color: var(--color-primary-active);
}

/* Category-specific accents using teal for secondary links */
.link-card[data-category="writing"]::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 3px;
    height: 100%;
    background: var(--color-accent-secondary);
    opacity: 0.5;
    transition: opacity var(--transition-smooth);
}

.link-card[data-category="writing"]:hover::after,
.link-card[data-category="writing"]:focus::after {
    opacity: 1;
}

.link-number {
    font-family: var(--font-display);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    position: relative;
    z-index: 1;
    transition: all var(--transition-smooth);
}

.link-card:hover .link-number,
.link-card:focus .link-number {
    color: var(--ink-900);
    transform: scale(1.1);
}

.link-content {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    position: relative;
    z-index: 1;
}

.link-title {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    transition: color var(--transition-smooth);
}

.link-card:hover .link-title,
.link-card:focus .link-title {
    color: var(--color-bg);
}

.link-url {
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-smooth);
}

.link-card:hover .link-url,
.link-card:focus .link-url {
    color: var(--ink-900);
}

.link-arrow {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    position: relative;
    z-index: 1;
    transition: all var(--transition-snap);
}

.link-card:hover .link-arrow,
.link-card:focus .link-arrow {
    color: var(--ink-900);
    transform: translateX(4px);
}

/* ===================================
   FOOTER
   =================================== */
.footer {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    animation: fadeInUp 0.8s cubic-bezier(0.23, 1, 0.32, 1) 0.8s backwards;
}

.footer-text {
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-align: center;
}

/* ===================================
   ANIMATIONS
   =================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */
@media (min-width: 768px) {
    .container {
        max-width: 540px;
        padding: var(--spacing-2xl) var(--spacing-lg);
    }

    .hero {
        margin-bottom: 4rem;
    }

    .link-card {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    body {
        cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><circle cx="12" cy="12" r="4" fill="%23E85A33"/></svg>') 12 12, auto;
    }

    .link-card {
        cursor: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32"><circle cx="16" cy="16" r="8" fill="%23E85A33"/></svg>') 16 16, pointer;
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: 600px;
    }
}

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

    .grain {
        animation: none;
    }
}

.link-card:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 4px;
}

.link-card:focus:not(:focus-visible) {
    outline: none;
}