/* ========================================
   Michael Siame — Portfolio Stylesheet v2
   Interactive + Hire-Me Focused
   ======================================== */

:root {
    --color-bg: #0a0a0b;
    --color-bg-alt: #111113;
    --color-surface: #18181b;
    --color-surface-hover: #1f1f23;
    --color-border: #27272a;
    --color-border-light: #3f3f46;
    --color-text: #fafafa;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;
    --color-accent: #6366f1;
    --color-accent-light: #818cf8;
    --color-accent-glow: rgba(99, 102, 241, 0.15);
    --color-accent-glow-strong: rgba(99, 102, 241, 0.3);
    --color-green: #22c55e;
    --color-orange: #f97316;
    --color-cyan: #06b6d4;
    --color-pink: #ec4899;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    font-family: var(--font-main);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* --- Particle Canvas --- */
#particleCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* --- Cursor Glow --- */
.cursor-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.4s ease;
}
body:hover .cursor-glow { opacity: 1; }

/* --- Toast Notification --- */
.toast {
    position: fixed;
    top: 24px;
    right: 24px;
    z-index: 200;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transform: translateX(120%);
    opacity: 0;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.toast.show {
    transform: translateX(0);
    opacity: 1;
}
.toast-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-green);
    animation: pulse-dot 2s ease-in-out infinite;
    flex-shrink: 0;
}

/* --- Container --- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 16px 0;
    transition: var(--transition);
}
.nav.scrolled {
    background: rgba(10, 10, 11, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 12px 0;
}
.nav-inner {
    max-width: 1200px; margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
}
.nav-logo { font-size: 1.5rem; font-weight: 800; letter-spacing: -0.02em; }
.accent { color: var(--color-accent); }
.nav-links { display: flex; gap: 32px; }
.nav-link {
    font-size: 0.875rem; font-weight: 500; color: var(--color-text-secondary);
    transition: var(--transition); position: relative;
}
.nav-link::after {
    content: ''; position: absolute; bottom: -4px; left: 0;
    width: 0; height: 2px; background: var(--color-accent); transition: var(--transition);
}
.nav-link:hover, .nav-link.active { color: var(--color-text); }
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-toggle {
    display: none; flex-direction: column; gap: 5px;
    background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span {
    display: block; width: 24px; height: 2px;
    background: var(--color-text); transition: var(--transition); border-radius: 2px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 14px 28px; border-radius: var(--radius);
    font-size: 0.9375rem; font-weight: 600;
    transition: var(--transition); cursor: pointer; border: none;
    position: relative; overflow: hidden;
}
.btn::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0; transition: var(--transition);
}
.btn:hover::after { opacity: 1; }
.btn-primary { background: var(--color-accent); color: white; }
.btn-primary:hover {
    background: var(--color-accent-light); transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--color-accent-glow-strong);
}
.btn-outline {
    background: transparent; color: var(--color-text);
    border: 1px solid var(--color-border-light);
}
.btn-outline:hover {
    border-color: var(--color-accent); color: var(--color-accent-light);
    transform: translateY(-2px);
}
.btn-ghost {
    background: transparent; color: var(--color-text-secondary);
    padding: 14px 20px;
}
.btn-ghost:hover { color: var(--color-text); transform: translateY(-2px); }
.btn-sm { padding: 10px 20px; font-size: 0.8125rem; }
.btn-large { padding: 18px 36px; font-size: 1rem; }

/* --- Hero --- */
.hero {
    min-height: 100vh; display: flex; align-items: center;
    position: relative; overflow: hidden; padding: 120px 24px 80px;
}
.hero-bg-grid {
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(99, 102, 241, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(99, 102, 241, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 100%);
}
.hero-content { max-width: 1200px; margin: 0 auto; width: 100%; position: relative; z-index: 1; }
.hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 8px 16px; border-radius: 100px;
    background: var(--color-accent-glow);
    border: 1px solid rgba(99, 102, 241, 0.2);
    font-size: 0.8rem; font-weight: 500; color: var(--color-accent-light);
    margin-bottom: 32px; animation: fadeInUp 0.8s ease both;
}
.hero-badge::before {
    content: ''; width: 8px; height: 8px; border-radius: 50%;
    background: var(--color-green); animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}
.hero-title { margin-bottom: 24px; animation: fadeInUp 0.8s ease 0.1s both; }
.hero-greeting {
    display: block; font-size: 1.125rem; font-weight: 400;
    color: var(--color-text-secondary); letter-spacing: 0.05em;
    text-transform: uppercase; margin-bottom: 8px;
}
.hero-name {
    display: block; font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900; line-height: 1; letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-subtitle {
    font-family: var(--font-mono); font-size: 1.125rem;
    color: var(--color-accent-light); margin-bottom: 20px;
    min-height: 1.5em; animation: fadeInUp 0.8s ease 0.2s both;
}
.typing-cursor { animation: blink 1s step-end infinite; color: var(--color-accent); }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }
.hero-description {
    font-size: 1.125rem; color: var(--color-text-secondary);
    max-width: 600px; margin-bottom: 40px; animation: fadeInUp 0.8s ease 0.3s both;
}
.hero-description strong { color: var(--color-text); }
.hero-cta {
    display: flex; gap: 12px; flex-wrap: wrap;
    margin-bottom: 64px; animation: fadeInUp 0.8s ease 0.4s both;
}
.hero-stats { display: flex; gap: 48px; animation: fadeInUp 0.8s ease 0.5s both; }
.stat { display: flex; flex-direction: column; }
.stat-number { font-size: 2.5rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1; }
.stat-plus { font-size: 2rem; font-weight: 700; color: var(--color-accent); }
.stat-label {
    font-size: 0.8125rem; color: var(--color-text-muted);
    margin-top: 4px; text-transform: uppercase; letter-spacing: 0.1em;
}
.stat-sub { font-size: 0.6875rem; color: var(--color-accent-light); margin-top: 2px; }
.scroll-indicator {
    position: absolute; bottom: 32px; right: 32px;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.scroll-indicator span {
    font-size: 0.6875rem; text-transform: uppercase; letter-spacing: 0.2em;
    color: var(--color-text-muted); writing-mode: vertical-rl;
}
.scroll-line { width: 1px; height: 60px; background: var(--color-border); position: relative; overflow: hidden; }
.scroll-line::after {
    content: ''; position: absolute; top: -100%; width: 100%; height: 40%;
    background: var(--color-accent); animation: scrollDown 2s ease-in-out infinite;
}
@keyframes scrollDown { 0% { top: -40%; } 100% { top: 100%; } }

/* --- Sections --- */
.section { padding: 120px 0; position: relative; }
.section-dark { background: var(--color-bg-alt); }
.section-header { margin-bottom: 64px; }
.section-tag {
    display: inline-block; font-family: var(--font-mono);
    font-size: 0.8125rem; color: var(--color-accent);
    letter-spacing: 0.1em; margin-bottom: 16px;
}
.section-title { font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; letter-spacing: -0.02em; }
.section-description {
    font-size: 1.0625rem; color: var(--color-text-secondary);
    margin-top: 12px; max-width: 560px;
}

/* --- About --- */
.about-grid { display: grid; grid-template-columns: 1fr 380px; gap: 64px; align-items: start; }
.about-text p { color: var(--color-text-secondary); margin-bottom: 20px; font-size: 1.0625rem; }
.about-text strong { color: var(--color-text); }
.about-lead { font-size: 1.1875rem !important; color: var(--color-text) !important; }
.about-highlights { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 32px; }
.highlight {
    display: flex; align-items: center; gap: 10px;
    padding: 12px 16px; background: var(--color-surface);
    border-radius: var(--radius-sm); border: 1px solid var(--color-border);
    font-size: 0.875rem; font-weight: 500;
    transition: var(--transition);
}
.highlight:hover { border-color: var(--color-accent); transform: translateX(4px); }
.highlight-icon { color: var(--color-accent); display: flex; flex-shrink: 0; }
.about-card { position: sticky; top: 100px; }
.about-card-inner {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: 32px; text-align: center;
    transition: var(--transition-slow);
}
.about-avatar { margin-bottom: 20px; }
.avatar-placeholder {
    width: 100px; height: 100px; border-radius: 50%;
    background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
    display: flex; align-items: center; justify-content: center;
    font-size: 2rem; font-weight: 800; color: white;
    margin: 0 auto; position: relative;
    box-shadow: 0 0 40px var(--color-accent-glow-strong);
}
.avatar-placeholder span { position: relative; z-index: 1; }
.avatar-ring {
    position: absolute; inset: -4px; border-radius: 50%;
    border: 2px solid var(--color-accent); opacity: 0.3;
    animation: ring-pulse 3s ease-in-out infinite;
}
@keyframes ring-pulse {
    0%, 100% { transform: scale(1); opacity: 0.3; }
    50% { transform: scale(1.1); opacity: 0.6; }
}
.avatar-small { width: 72px; height: 72px; font-size: 1.25rem; }
.avatar-small .avatar-ring { inset: -3px; }
.about-card-info h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 4px; }
.about-card-info p { color: var(--color-text-secondary); font-size: 0.875rem; }
.about-card-details { margin-top: 24px; display: flex; flex-direction: column; gap: 12px; }
.card-detail {
    display: flex; justify-content: space-between; align-items: center;
    padding: 10px 0; border-top: 1px solid var(--color-border); font-size: 0.875rem;
}
.detail-label { color: var(--color-text-muted); }
.detail-value { font-weight: 600; }
.status-active {
    color: var(--color-green); display: flex; align-items: center; gap: 6px;
}
.status-active::before {
    content: ''; width: 6px; height: 6px; border-radius: 50%;
    background: var(--color-green); animation: pulse-dot 2s ease-in-out infinite;
}

/* --- Why Hire Me (Value Props) --- */
.value-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.value-card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: 32px;
    transition: var(--transition); position: relative; overflow: hidden;
}
.value-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    opacity: 0; transition: var(--transition);
}
.value-card:hover { border-color: var(--color-accent); transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.15);
}
.value-card:hover::before { opacity: 1; }
.value-card-large {
    grid-column: span 3;
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(99, 102, 241, 0.05) 100%);
    border-color: rgba(99, 102, 241, 0.15);
}
.value-card-large::before { opacity: 1; }
.value-number {
    font-family: var(--font-mono); font-size: 0.875rem;
    color: var(--color-accent); font-weight: 600; margin-bottom: 16px;
}
.value-card h3 { font-size: 1.25rem; font-weight: 800; margin-bottom: 12px; }
.value-card p { color: var(--color-text-secondary); font-size: 0.9375rem; margin-bottom: 20px; line-height: 1.7; }
.value-proof { display: flex; flex-wrap: wrap; gap: 8px; }
.proof-tag {
    padding: 4px 12px; font-size: 0.75rem; font-family: var(--font-mono);
    background: var(--color-accent-glow); border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 100px; color: var(--color-accent-light); font-weight: 500;
}

/* --- Skills --- */
.skills-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.skill-category {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 28px; transition: var(--transition);
}
.skill-category:hover {
    border-color: var(--color-accent); transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.skill-category-header { display: flex; align-items: center; gap: 14px; margin-bottom: 20px; }
.skill-icon {
    width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
    background: var(--color-accent-glow); border-radius: var(--radius-sm); color: var(--color-accent-light);
}
.skill-category h3 { font-size: 1rem; font-weight: 700; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.skill-tag {
    padding: 6px 14px; background: var(--color-bg); border: 1px solid var(--color-border);
    border-radius: 100px; font-size: 0.8125rem; font-weight: 500;
    color: var(--color-text-secondary); transition: var(--transition);
}
.skill-tag-hot {
    background: var(--color-accent-glow); border-color: rgba(99, 102, 241, 0.2);
    color: var(--color-accent-light);
}
.skill-category:hover .skill-tag { border-color: var(--color-border-light); color: var(--color-text); }

/* Skill Bars */
.skill-bars { display: flex; flex-direction: column; gap: 16px; }
.skill-bar-item { }
.skill-bar-header {
    display: flex; justify-content: space-between; align-items: center;
    margin-bottom: 8px; font-size: 0.875rem; font-weight: 600;
}
.skill-bar-label { font-size: 0.75rem; color: var(--color-text-muted); font-weight: 400; }
.skill-bar {
    height: 6px; background: var(--color-bg); border-radius: 100px; overflow: hidden;
}
.skill-bar-fill {
    height: 100%; width: 0; border-radius: 100px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Projects --- */
.projects-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.project-card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: 32px;
    transition: var(--transition); position: relative; overflow: hidden;
}
.project-card::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    opacity: 0; transition: var(--transition);
}
.project-card:hover {
    border-color: var(--color-border-light); transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}
.project-card:hover::before { opacity: 1; }
.project-featured {
    grid-column: span 2;
    background: linear-gradient(135deg, var(--color-surface) 0%, rgba(99, 102, 241, 0.05) 100%);
    border-color: rgba(99, 102, 241, 0.15);
}
.project-featured::before { opacity: 1; }
.project-card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.project-number { font-family: var(--font-mono); font-size: 0.875rem; color: var(--color-accent); font-weight: 600; }
.project-links { display: flex; gap: 8px; }
.project-link-icon {
    width: 40px; height: 40px; display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius-sm); border: 1px solid var(--color-border);
    color: var(--color-text-secondary); transition: var(--transition);
}
.project-link-icon:hover {
    border-color: var(--color-accent); color: var(--color-accent-light);
    background: var(--color-accent-glow);
}
.project-title { font-size: 1.5rem; font-weight: 800; margin-bottom: 6px; }
.project-subtitle { font-size: 0.9375rem; color: var(--color-accent-light); margin-bottom: 16px; font-weight: 500; }
.project-description { color: var(--color-text-secondary); font-size: 0.9375rem; margin-bottom: 24px; line-height: 1.7; }
.project-description strong { color: var(--color-text); }

/* Project Metrics */
.project-metrics { display: flex; gap: 24px; margin-bottom: 20px; }
.metric { display: flex; flex-direction: column; }
.metric-value { font-size: 1.25rem; font-weight: 800; color: var(--color-text); font-family: var(--font-mono); }
.metric-label { font-size: 0.6875rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

.project-tech { display: flex; flex-wrap: wrap; gap: 8px; }
.project-tech span {
    padding: 4px 12px; font-size: 0.75rem; font-family: var(--font-mono);
    background: var(--color-bg); border: 1px solid var(--color-border);
    border-radius: 100px; color: var(--color-text-muted); font-weight: 500;
}
.project-badge {
    position: absolute; top: 20px; right: 20px; padding: 4px 12px;
    font-size: 0.6875rem; font-weight: 600; text-transform: uppercase;
    letter-spacing: 0.08em; border-radius: 100px;
}
.badge-live { background: rgba(34, 197, 94, 0.1); color: var(--color-green); border: 1px solid rgba(34, 197, 94, 0.2); }
.badge-ai { background: var(--color-accent-glow); color: var(--color-accent-light); border: 1px solid rgba(99, 102, 241, 0.2); }
.badge-enterprise { background: rgba(249, 115, 22, 0.1); color: var(--color-orange); border: 1px solid rgba(249, 115, 22, 0.2); }
.badge-hardware { background: rgba(6, 182, 212, 0.1); color: var(--color-cyan); border: 1px solid rgba(6, 182, 212, 0.2); }
.badge-client { background: rgba(236, 72, 153, 0.1); color: var(--color-pink); border: 1px solid rgba(236, 72, 153, 0.2); }

/* --- GitHub Section --- */
.github-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 20px; }
.github-card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: 28px; transition: var(--transition);
}
.github-card:hover { border-color: var(--color-border-light); }
.github-overview { text-align: center; }
.github-avatar { margin-bottom: 16px; }
.github-card h3 { font-size: 1.125rem; font-weight: 700; margin-bottom: 4px; }
.github-card h4 { font-size: 0.9375rem; font-weight: 700; margin-bottom: 16px; }
.github-bio { color: var(--color-text-secondary); font-size: 0.8125rem; margin-bottom: 20px; }
.github-stats-row { display: flex; justify-content: center; gap: 24px; margin-bottom: 24px; }
.github-stat { text-align: center; }
.gs-number { display: block; font-size: 1.5rem; font-weight: 800; }
.gs-label { font-size: 0.6875rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.08em; }

/* Language Bars */
.lang-bars { display: flex; flex-direction: column; gap: 12px; }
.lang-bar-row { display: flex; align-items: center; gap: 10px; }
.lang-name { font-size: 0.8125rem; font-weight: 500; min-width: 100px; display: flex; align-items: center; gap: 6px; }
.lang-dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.lang-bar { flex: 1; height: 6px; background: var(--color-bg); border-radius: 100px; overflow: hidden; }
.lang-bar-fill {
    height: 100%; width: 0; border-radius: 100px;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.lang-pct { font-size: 0.75rem; color: var(--color-text-muted); font-family: var(--font-mono); min-width: 40px; text-align: right; }

/* Activity Feed */
.activity-feed { display: flex; flex-direction: column; gap: 0; }
.activity-item {
    display: flex; align-items: flex-start; gap: 12px;
    padding: 10px 0; border-bottom: 1px solid var(--color-border);
}
.activity-item:last-child { border-bottom: none; }
.activity-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--color-border-light); flex-shrink: 0; margin-top: 6px;
}
.activity-dot.active { background: var(--color-green); }
.activity-content { font-size: 0.8125rem; color: var(--color-text-secondary); line-height: 1.5; }
.activity-content strong { color: var(--color-text); font-weight: 600; }
.activity-time { display: block; font-size: 0.6875rem; color: var(--color-text-muted); margin-top: 2px; }

/* --- Education --- */
.education-content { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.education-main { position: sticky; top: 100px; }
.education-degree {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius-lg); padding: 40px; transition: var(--transition);
}
.education-degree h3 { font-size: 1.5rem; font-weight: 800; margin-bottom: 12px; }
.education-school { font-size: 1.0625rem; color: var(--color-text-secondary); margin-bottom: 4px; }
.education-uni { color: var(--color-text-muted); font-size: 0.9375rem; margin-bottom: 20px; }
.education-status {
    display: inline-flex; align-items: center; gap: 8px; padding: 8px 16px;
    background: rgba(34, 197, 94, 0.1); border: 1px solid rgba(34, 197, 94, 0.2);
    color: var(--color-green); border-radius: 100px; font-size: 0.8125rem; font-weight: 600;
}
.timeline { display: flex; flex-direction: column; position: relative; }
.timeline::before {
    content: ''; position: absolute; left: 24px; top: 0; bottom: 0;
    width: 2px; background: var(--color-border);
}
.timeline-item { display: flex; gap: 24px; padding: 28px 0; position: relative; }
.timeline-marker {
    width: 48px; height: 48px; flex-shrink: 0; display: flex;
    align-items: center; justify-content: center;
    background: var(--color-surface); border: 2px solid var(--color-accent);
    border-radius: 50%; font-family: var(--font-mono);
    font-size: 0.8125rem; font-weight: 700; color: var(--color-accent-light);
    position: relative; z-index: 1;
}
.timeline-content h4 { font-size: 1.0625rem; font-weight: 700; margin-bottom: 12px; }
.timeline-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.timeline-tags span {
    padding: 6px 14px; background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: 100px; font-size: 0.8125rem; color: var(--color-text-secondary);
}

/* --- Contact --- */
.contact-hero { text-align: center; margin-bottom: 64px; }
.contact-headline {
    font-size: clamp(2rem, 5vw, 3.5rem); font-weight: 900;
    letter-spacing: -0.03em; line-height: 1.1; margin-bottom: 24px;
}
.accent-text { color: var(--color-accent-light); }
.contact-lead {
    font-size: 1.125rem; color: var(--color-text-secondary);
    max-width: 600px; margin: 0 auto 40px;
}
.contact-cta-row { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.contact-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-bottom: 64px;
}
.contact-card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 28px 20px;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    transition: var(--transition); cursor: pointer;
}
.contact-card:hover {
    border-color: var(--color-accent); transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}
.contact-icon {
    width: 48px; height: 48px; display: flex; align-items: center; justify-content: center;
    background: var(--color-accent-glow); border-radius: 50%;
    color: var(--color-accent-light); margin-bottom: 4px;
}
.contact-label { font-size: 0.75rem; color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.1em; }
.contact-value { font-size: 0.875rem; font-weight: 600; }
.contact-references { text-align: center; }
.contact-references h3 { font-size: 1.25rem; font-weight: 700; margin-bottom: 24px; }
.references-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; max-width: 600px; margin: 0 auto; }
.reference-card {
    background: var(--color-surface); border: 1px solid var(--color-border);
    border-radius: var(--radius); padding: 24px; text-align: left;
}
.reference-card h4 { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.reference-card p { font-size: 0.8125rem; color: var(--color-text-secondary); margin-bottom: 8px; }
.reference-card span { font-size: 0.8125rem; color: var(--color-text-muted); font-family: var(--font-mono); }

/* --- Footer --- */
.footer { padding: 32px 0; border-top: 1px solid var(--color-border); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; }
.footer-logo { font-size: 1.25rem; font-weight: 800; }
.footer p { font-size: 0.8125rem; color: var(--color-text-muted); }
.footer-gh {
    color: var(--color-text-muted); transition: var(--transition);
    display: flex; align-items: center;
}
.footer-gh:hover { color: var(--color-accent-light); transform: scale(1.1); }

/* --- Animations --- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
[data-animate] {
    opacity: 0; transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-animate].visible { opacity: 1; transform: translateY(0); }

/* Staggered animation delay for children */
[data-animate]:nth-child(2) { transition-delay: 0.1s; }
[data-animate]:nth-child(3) { transition-delay: 0.2s; }
[data-animate]:nth-child(4) { transition-delay: 0.3s; }
[data-animate]:nth-child(5) { transition-delay: 0.4s; }

/* --- Tilt effect base --- */
[data-tilt] { transition: transform 0.15s ease; }

/* --- Responsive --- */
@media (max-width: 1024px) {
    .about-grid { grid-template-columns: 1fr; gap: 40px; }
    .about-card { position: static; }
    .skills-grid { grid-template-columns: 1fr; }
    .projects-grid { grid-template-columns: 1fr; }
    .project-featured { grid-column: span 1; }
    .value-grid { grid-template-columns: 1fr 1fr; }
    .value-card-large { grid-column: span 2; }
    .education-content { grid-template-columns: 1fr; gap: 40px; }
    .education-main { position: static; }
    .github-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .nav-links {
        display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
        background: var(--color-bg); flex-direction: column; align-items: center;
        justify-content: center; gap: 24px; z-index: 99;
    }
    .nav-links.active { display: flex; }
    .nav-links .nav-link { font-size: 1.25rem; }
    .nav-toggle { display: flex; z-index: 101; }
    .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
    .hero { padding: 100px 24px 60px; }
    .hero-stats { gap: 32px; flex-wrap: wrap; }
    .stat-number { font-size: 2rem; }
    .section { padding: 80px 0; }
    .section-header { margin-bottom: 40px; }
    .value-grid { grid-template-columns: 1fr; }
    .value-card-large { grid-column: span 1; }
    .about-highlights { grid-template-columns: 1fr; }
    .hero-cta { flex-direction: column; max-width: 280px; }
    .scroll-indicator { display: none; }
    .references-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .contact-cta-row { flex-direction: column; align-items: center; }
    .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
    .project-metrics { gap: 16px; flex-wrap: wrap; }
    .toast { top: auto; bottom: 24px; right: 12px; left: 12px; font-size: 0.75rem; }
}

@media (max-width: 480px) {
    .hero-name { font-size: 2.5rem; }
    .hero-stats { flex-direction: column; gap: 20px; }
    .stat { flex-direction: row; align-items: baseline; gap: 12px; }
}

/* ========================================
   Interactive Book — Peza Nyumba Case Study
   ======================================== */

.book-wrapper {
    position: relative;
    max-width: 740px;
    margin: 0 auto;
    perspective: 1800px;
    z-index: 1;
    isolation: isolate;
}

.book {
    position: relative;
    width: 100%;
    min-height: 560px;
    overflow: hidden;
}

/* --- Individual Page --- */
.book-page {
    position: absolute;
    inset: 0;
    opacity: 0;
    transform: rotateY(12deg) scale(0.95);
    transform-origin: left center;
    transition: opacity 0.5s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 0;
}

.book-page.active {
    opacity: 1;
    transform: rotateY(0deg) scale(1);
    pointer-events: auto;
    z-index: 2;
}

.book-page.flip-left {
    opacity: 0;
    transform: rotateY(-30deg) scale(0.92);
}

.book-page.flip-right {
    opacity: 0;
    transform: rotateY(30deg) scale(0.92);
}

.page-inner {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 48px 44px;
    min-height: 560px;
    position: relative;
    overflow: hidden;
    box-shadow:
        8px 0 30px -10px rgba(0, 0, 0, 0.4),
        inset -2px 0 8px -2px rgba(0, 0, 0, 0.15);
}

.page-inner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(99, 102, 241, 0.3) 20%,
        rgba(99, 102, 241, 0.1) 80%,
        transparent 100%
    );
}

/* Book spine decoration */
.book-spine {
    position: absolute;
    left: -2px;
    top: 10%;
    bottom: 10%;
    width: 4px;
    background: linear-gradient(180deg, var(--color-accent), var(--color-accent-light));
    border-radius: 4px;
    opacity: 0.4;
    pointer-events: none;
}

/* --- Page Number --- */
.page-number {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.08em;
}

.page-title {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

.page-divider {
    width: 48px;
    height: 3px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-light));
    border-radius: 3px;
    margin-bottom: 28px;
}

/* --- Cover Page --- */
.page-cover {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(
        135deg,
        var(--color-surface) 0%,
        rgba(99, 102, 241, 0.06) 50%,
        var(--color-surface) 100%
    );
    border-color: rgba(99, 102, 241, 0.15);
}

.cover-glow {
    position: absolute;
    top: -60px;
    right: -60px;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.cover-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-glow);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 20px;
    color: var(--color-accent-light);
    margin-bottom: 28px;
    animation: cover-float 4s ease-in-out infinite;
}

@keyframes cover-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.cover-title {
    font-size: 2.25rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cover-subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    font-weight: 500;
}

.cover-divider {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
    margin-bottom: 20px;
}

.cover-tagline {
    font-size: 0.9375rem;
    color: var(--color-text-muted);
    margin-bottom: 28px;
    max-width: 400px;
}

.cover-tech-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 36px;
}

.cover-tech-row span {
    padding: 5px 14px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    background: var(--color-accent-glow);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 100px;
    color: var(--color-accent-light);
    font-weight: 500;
}

.cover-page-hint {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    animation: hint-nudge 2s ease-in-out infinite;
}

@keyframes hint-nudge {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(6px); }
}


/* --- Chapter Page Layout --- */
.page-chapter {
    display: flex;
    flex-direction: column;
}

.chapter-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 4px 12px;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    border-radius: 100px;
}

.badge-fullstack { background: rgba(99, 102, 241, 0.15); color: var(--color-accent-light); border: 1px solid rgba(99, 102, 241, 0.25); }

.chapter-subtitle {
    font-size: 0.9375rem;
    color: var(--color-accent-light);
    font-weight: 500;
    margin-bottom: 4px;
}

.chapter-description {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 20px;
}

.chapter-description strong { color: var(--color-text); }

.chapter-stats {
    display: flex;
    gap: 24px;
    margin-bottom: 20px;
}

.chapter-stat { display: flex; flex-direction: column; }

.chapter-stat-num {
    font-size: 1.25rem;
    font-weight: 800;
    font-family: var(--font-mono);
    color: var(--color-text);
    line-height: 1;
}

.chapter-stat-label {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 2px;
}

.chapter-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.chapter-tech span {
    padding: 4px 12px;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    color: var(--color-text-muted);
    font-weight: 500;
}

.chapter-links {
    display: flex;
    gap: 12px;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
}

.chapter-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 0.8125rem;
    font-weight: 600;
    background: var(--color-accent-glow);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: 100px;
    color: var(--color-accent-light);
    transition: var(--transition);
}

.chapter-link:hover {
    background: rgba(99, 102, 241, 0.25);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

/* --- Chapter Label (above book) --- */
.book-chapter-label {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-bottom: 16px;
    min-height: 1.5em;
    transition: opacity 0.3s ease;
}

/* --- Page Counter --- */
.book-page-counter {
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 12px;
    letter-spacing: 0.1em;
}

/* --- Book Controls --- */
.book-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 32px;
}

.book-btn {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.book-btn:hover:not(:disabled) {
    border-color: var(--color-accent);
    color: var(--color-accent-light);
    background: var(--color-accent-glow);
    transform: scale(1.1);
}

.book-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.book-pagination {
    display: flex;
    align-items: center;
    gap: 6px;
}

.book-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-border);
    cursor: pointer;
    transition: var(--transition);
}

.book-dot:hover {
    background: var(--color-border-light);
    transform: scale(1.3);
}

.book-dot.active {
    background: var(--color-accent);
    box-shadow: 0 0 10px var(--color-accent-glow-strong);
    transform: scale(1.3);
    width: 20px;
    border-radius: 100px;
}

/* --- Book Responsive --- */
@media (max-width: 768px) {
    .page-inner {
        padding: 32px 24px;
        min-height: 520px;
    }

    .book { min-height: 520px; }

    .cover-title { font-size: 1.75rem; }
    .cover-icon { width: 64px; height: 64px; border-radius: 16px; }
    .cover-icon svg { width: 36px; height: 36px; }

    .chapter-stats { gap: 16px; flex-wrap: wrap; }

    .book-spine { display: none; }

    .book-dot { width: 6px; height: 6px; }
    .book-dot.active { width: 16px; }
    .book-pagination { gap: 4px; }
}

@media (max-width: 480px) {
    .page-inner { min-height: 480px; padding: 28px 20px; }
    .cover-tech-row span { font-size: 0.6875rem; padding: 4px 10px; }
    .chapter-description { font-size: 0.875rem; }
    .chapter-stats { gap: 12px; }
    .chapter-links { flex-wrap: wrap; }
}