/* ===========================================
   MOHAMMUD HASSAN - Personal Site
   Aesthetic: Editorial minimalism
   =========================================== */

:root {
    /* Core colors */
    --bg: #0a0a0a;
    --text: #e8e8e8;
    --text-muted: #888888;
    --text-dim: #555555;

    /* Chapter accent colors - subtle, warm tones */
    --chapter-1: #7c9eb2; /* Muted steel blue - tech, ambition */
    --chapter-2: #c9a96e; /* Warm gold - Africa, warmth */
    --chapter-3: #8fb88f; /* Sage green - growth, future */

    /* Typography */
    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-mono: 'IBM Plex Mono', monospace;

    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 2rem;
    --space-lg: 4rem;
    --space-xl: 8rem;

    /* Max width for readability */
    --max-width: 680px;
}

/* Reset & Base */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 18px;
}

body {
    font-family: var(--font-display);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background: var(--chapter-2);
    color: var(--bg);
}

/* Subtle grain overlay */
.grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}

/* ===========================================
   NAVIGATION
   =========================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    padding: var(--space-md) var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: linear-gradient(to bottom, var(--bg) 0%, transparent 100%);
}

.nav-name {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.nav-links {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a:hover {
    color: var(--text);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--text);
    transition: width 0.3s ease;
}

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

.nav-cta {
    padding: 0.5rem 1rem;
    border: 1px solid var(--text-dim);
    border-radius: 2px;
    transition: all 0.3s ease !important;
}

.nav-cta::after {
    display: none !important;
}

.nav-cta:hover {
    background: var(--text);
    color: var(--bg) !important;
    border-color: var(--text);
}

/* ===========================================
   HERO
   =========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl) var(--space-lg);
}

.hero-content {
    max-width: var(--max-width);
    text-align: center;
}

.hero-name {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 400;
    letter-spacing: 0.02em;
    margin-bottom: var(--space-sm);
    opacity: 0;
    animation: fadeUp 1s ease forwards;
}

.hero-tagline {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeUp 1s ease 0.2s forwards;
}

.hero-intro {
    opacity: 0;
    animation: fadeUp 1s ease 0.4s forwards;
}

.hero-intro p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 540px;
    margin: 0 auto var(--space-sm);
}

.hero-location {
    font-family: var(--font-mono);
    font-size: 0.75rem !important;
    letter-spacing: 0.05em;
    color: var(--text-dim) !important;
    margin-top: var(--space-md) !important;
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===========================================
   SECTION TITLES
   =========================================== */
.section-title {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: var(--space-lg);
}

/* ===========================================
   CHAPTERS
   =========================================== */
.chapters {
    padding: var(--space-xl) var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.chapter {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.chapter.visible {
    opacity: 1;
    transform: translateY(0);
}

.chapter-marker {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding-top: 0.3rem;
}

.chapter-number {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 0.1em;
}

.chapter-years {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.05em;
}

/* Chapter-specific accent colors */
.chapter-1 .chapter-years { color: var(--chapter-1); }
.chapter-2 .chapter-years { color: var(--chapter-2); }
.chapter-3 .chapter-years { color: var(--chapter-3); }

.chapter-content {
    border-left: 1px solid var(--text-dim);
    padding-left: var(--space-md);
    transition: border-color 0.4s ease;
}

.chapter-1:hover .chapter-content { border-color: var(--chapter-1); }
.chapter-2:hover .chapter-content { border-color: var(--chapter-2); }
.chapter-3:hover .chapter-content { border-color: var(--chapter-3); }

.chapter-title {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--space-sm);
    transition: color 0.3s ease;
}

.chapter-1:hover .chapter-title { color: var(--chapter-1); }
.chapter-2:hover .chapter-title { color: var(--chapter-2); }
.chapter-3:hover .chapter-title { color: var(--chapter-3); }

.chapter-body {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.chapter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.chapter-tags span {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.05em;
    color: var(--text-dim);
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--text-dim);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.chapter-1:hover .chapter-tags span {
    border-color: var(--chapter-1);
    color: var(--chapter-1);
}

.chapter-2:hover .chapter-tags span {
    border-color: var(--chapter-2);
    color: var(--chapter-2);
}

.chapter-3:hover .chapter-tags span {
    border-color: var(--chapter-3);
    color: var(--chapter-3);
}

/* ===========================================
   UNLOCKED MANIFESTO
   =========================================== */
.unlocked {
    padding: var(--space-xl) var(--space-lg);
    background: linear-gradient(to bottom, transparent 0%, rgba(201, 169, 110, 0.03) 50%, transparent 100%);
}

.unlocked-header {
    max-width: var(--max-width);
    margin: 0 auto var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.unlocked-label {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    color: var(--chapter-2);
    text-transform: uppercase;
}

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

.unlocked-quote {
    margin-bottom: var(--space-lg);
    padding-left: var(--space-md);
    border-left: 2px solid var(--chapter-2);
}

.unlocked-quote p {
    font-size: 1.75rem;
    font-style: italic;
    font-weight: 400;
    line-height: 1.4;
    color: var(--text);
}

.unlocked-body p {
    color: var(--text-muted);
    margin-bottom: var(--space-md);
    font-size: 1.05rem;
}

.unlocked-body strong {
    color: var(--text);
    font-weight: 500;
}

.unlocked-highlight {
    color: var(--text) !important;
    font-style: italic;
}

.unlocked-insight {
    color: var(--text) !important;
    font-size: 1.15rem !important;
    line-height: 1.6;
}

.unlocked-divider {
    width: 40px;
    height: 1px;
    background: var(--text-dim);
    margin: var(--space-lg) 0;
}

.unlocked-final {
    font-size: 1.25rem !important;
    color: var(--chapter-2) !important;
    font-style: italic;
    margin-top: var(--space-lg) !important;
}

/* ===========================================
   CONNECT / CTA
   =========================================== */
.connect {
    padding: var(--space-xl) var(--space-lg);
    text-align: center;
}

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

.connect-heading {
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: var(--space-md);
}

.connect-text {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: var(--space-lg);
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.connect-links {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.connect-cta {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--bg);
    background: var(--text);
    padding: 1rem 2rem;
    text-decoration: none;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.connect-cta:hover {
    background: var(--chapter-2);
    transform: translateY(-2px);
}

.connect-email {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    padding: 1rem 2rem;
    text-decoration: none;
    border: 1px solid var(--text-dim);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.connect-email:hover {
    color: var(--text);
    border-color: var(--text);
}

/* ===========================================
   FOOTER
   =========================================== */
.footer {
    padding: var(--space-lg) var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

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

.footer-links {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-sep {
    color: var(--text-dim);
    margin: 0 var(--space-sm);
}

.footer-tagline {
    font-family: var(--font-mono);
    font-size: 0.6rem;
    letter-spacing: 0.1em;
    color: var(--text-dim);
}

/* ===========================================
   MOBILE RESPONSIVE
   =========================================== */
@media (max-width: 768px) {
    html {
        font-size: 16px;
    }

    .nav {
        padding: var(--space-sm) var(--space-md);
    }

    .nav-links {
        gap: var(--space-sm);
    }

    .nav-links a:not(.nav-cta) {
        display: none;
    }

    .hero {
        padding: var(--space-lg) var(--space-md);
    }

    .chapters {
        padding: var(--space-lg) var(--space-md);
    }

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

    .chapter-marker {
        flex-direction: row;
        gap: var(--space-sm);
        align-items: center;
    }

    .chapter-content {
        border-left: none;
        padding-left: 0;
        border-top: 1px solid var(--text-dim);
        padding-top: var(--space-md);
    }

    .unlocked {
        padding: var(--space-lg) var(--space-md);
    }

    .unlocked-header {
        flex-direction: column;
        gap: var(--space-xs);
    }

    .unlocked-quote p {
        font-size: 1.4rem;
    }

    .connect {
        padding: var(--space-lg) var(--space-md);
    }

    .connect-heading {
        font-size: 2rem;
    }

    .connect-links {
        flex-direction: column;
        align-items: center;
    }

    .footer {
        padding: var(--space-md) var(--space-md);
    }
}

/* ===========================================
   SUBTLE ANIMATIONS
   =========================================== */

/* Link hover glow */
a {
    transition: all 0.3s ease;
}

/* Smooth chapter transitions */
.chapter-content,
.chapter-title,
.chapter-tags span {
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Paragraph fade-in on scroll */
.unlocked-body p {
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.6s ease;
}

.unlocked-body p.visible {
    opacity: 1;
    transform: translateY(0);
}