/* ===== CSS CUSTOM PROPERTIES - THEME SYSTEM ===== */
:root {
  --bg: #ffffff;
  --bg-alt: #f8fafc;
  --card: #ffffff;
  --text: #0f172a;
  --text-soft: #475569;
  --text-muted: #94a3b8;
  --border: #e2e8f0;
  --border-hover: #cbd5e1;
  --accent: #0d9488;
  --accent-soft: #f0fdfa;
  --accent-text: #115e59;
  --red: #e11d48;
  --red-soft: #fff1f2;
  --amber: #d97706;
  --amber-soft: #fffbeb;
  --violet: #7c3aed;
  --violet-soft: #f5f3ff;
  --shadow: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.08);
  --radius: 12px;
  --max-width: 1100px;
}

[data-theme="dark"] {
  --bg: #0f172a;
  --bg-alt: #1e293b;
  --card: #1e293b;
  --text: #f8fafc;
  --text-soft: #94a3b8;
  --text-muted: #64748b;
  --border: #334155;
  --border-hover: #475569;
  --accent: #14b8a6;
  --accent-soft: #134e4a;
  --accent-text: #5eead4;
  --red: #fb7185;
  --red-soft: #3e1118;
  --amber: #fbbf24;
  --amber-soft: #38260a;
  --violet: #a78bfa;
  --violet-soft: #2e1a47;
  --shadow: 0 1px 3px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.4);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s, color 0.3s;
}
a { color: var(--accent); text-decoration: none; }
img { max-width: 100%; }

/* ===== UTILITIES ===== */
.hidden { display: none !important; }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.center { text-align: center; }

/* ===== THEME TOGGLE ===== */
.theme-toggle {
  position: fixed; top: 16px; right: 16px; z-index: 1000;
  width: 40px; height: 40px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--card);
  color: var(--text-soft); font-size: 18px; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.2s;
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }

/* ===== RESUME BUTTON ===== */
.resume-btn {
  position: fixed; bottom: 20px; right: 20px; z-index: 999;
  background: var(--accent); color: white; border: none;
  padding: 12px 20px; border-radius: 12px; font-weight: 700;
  font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px;
  cursor: pointer; box-shadow: var(--shadow-lg); transition: all 0.2s;
}
.resume-btn:hover { transform: translateY(-2px); filter: brightness(1.1); }

/* ===== NAVIGATION ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  background: rgba(255,255,255,0.85); backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border); transform: translateY(-100%);
  transition: transform 0.3s;
}
[data-theme="dark"] .navbar { background: rgba(15,23,42,0.85); }
.navbar.visible { transform: translateY(0); }
.nav-inner { max-width: var(--max-width); margin: 0 auto; padding: 10px 24px; display: flex; align-items: center; justify-content: space-between; }
.nav-logo { font-weight: 900; font-size: 18px; color: var(--text); }
.nav-links { display: flex; gap: 4px; }
.nav-links a { padding: 6px 12px; border-radius: 6px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-muted); transition: all 0.15s; }
.nav-links a:hover, .nav-links a.active { color: var(--accent); background: var(--accent-soft); }
.menu-btn { display: none; background: none; border: none; font-size: 20px; color: var(--text); cursor: pointer; }
.mobile-menu { border-top: 1px solid var(--border); padding: 12px 24px; display: flex; flex-direction: column; gap: 4px; }
.mobile-menu a { padding: 10px 12px; border-radius: 6px; font-size: 12px; font-weight: 700; text-transform: uppercase; color: var(--text-soft); }

/* ===== HERO ===== */
.hero { min-height: 100vh; background: linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 50%, var(--accent-soft) 100%); }
.hero-layout { display: flex; max-width: 1400px; margin: 0 auto; min-height: 100vh; }
.hero-sidebar { width: 380px; padding: 60px 32px 40px; border-right: 1px solid var(--border); display: flex; flex-direction: column; justify-content: center; gap: 20px; position: sticky; top: 0; height: 100vh; }
.hero-main { flex: 1; padding: 60px 48px; display: flex; flex-direction: column; justify-content: center; }
.badge { display: inline-flex; align-items: center; gap: 6px; background: var(--accent-soft); color: var(--accent-text); border: 1px solid rgba(13,148,136,0.2); padding: 6px 12px; border-radius: 8px; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; width: fit-content; }
.hero h1 { font-size: 56px; font-weight: 900; line-height: 0.95; letter-spacing: -2px; }
.typewriter { font-size: 14px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--accent); min-height: 22px; }
.hero-headline { font-size: 14px; line-height: 1.6; color: var(--text-soft); }
.hero-contact { display: flex; flex-direction: column; gap: 8px; }
.hero-contact a, .hero-contact span { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-soft); transition: color 0.15s; }
.hero-contact a:hover { color: var(--accent); }
.hero-contact svg, .hero-contact .icon { width: 14px; text-align: center; color: var(--text-muted); }
.hero-filters small { display: block; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 2px; color: var(--text-muted); margin-bottom: 10px; }
.filter-btns { display: flex; flex-direction: column; gap: 6px; }
.filter-btn { padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--text-soft); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; cursor: pointer; transition: all 0.15s; text-align: left; }
.filter-btn:hover { border-color: var(--border-hover); color: var(--text); }
.filter-btn.active { background: var(--accent); border-color: var(--accent); color: white; }

/* Bio & Stats */
.hero-bio { font-size: 16px; line-height: 1.7; color: var(--text-soft); max-width: 640px; margin-bottom: 32px; }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 32px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); transition: all 0.2s; }
.stat:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.stat-num { font-size: 28px; font-weight: 900; color: var(--accent); }
.stat-label { font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-top: 4px; }
.hero-ctas { display: flex; gap: 10px; flex-wrap: wrap; }

/* ===== BUTTONS ===== */
.btn-primary { display: inline-block; background: var(--accent); color: white; padding: 10px 24px; border-radius: 10px; font-size: 13px; font-weight: 700; transition: all 0.15s; border: none; cursor: pointer; }
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-secondary { display: inline-block; background: var(--card); color: var(--text); padding: 10px 24px; border-radius: 10px; font-size: 13px; font-weight: 700; border: 1px solid var(--border); transition: all 0.15s; }
.btn-secondary:hover { border-color: var(--border-hover); background: var(--bg-alt); }

/* ===== SECTIONS ===== */
.section { padding: 80px 0; }
.section.alt { background: var(--bg-alt); }
.section-label { display: block; font-size: 10px; font-weight: 900; text-transform: uppercase; letter-spacing: 2px; color: var(--accent); margin-bottom: 10px; }
.section-label.red { color: var(--red); }
.section-label.amber { color: var(--amber); }
.section-label.violet { color: var(--violet); }
.section h2 { font-size: 36px; font-weight: 900; letter-spacing: -1px; line-height: 1.1; }
.section-desc { color: var(--text-soft); font-size: 15px; max-width: 600px; margin-top: 12px; margin-bottom: 36px; }

/* ===== TIMELINE ===== */
.timeline { position: relative; padding-left: 32px; }
.timeline::before { content: ''; position: absolute; left: 7px; top: 0; bottom: 0; width: 2px; background: linear-gradient(to bottom, var(--accent), transparent); opacity: 0.3; }
.timeline-item { position: relative; margin-bottom: 16px; }
.timeline-dot { position: absolute; left: -28px; top: 20px; width: 12px; height: 12px; background: var(--accent); border: 2px solid var(--bg); border-radius: 50%; }
.timeline-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.timeline-header { padding: 16px 20px; cursor: pointer; display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.timeline-header:hover { border-color: var(--border-hover); }
.timeline-meta { display: flex; gap: 10px; align-items: center; margin-bottom: 4px; flex-wrap: wrap; }
.timeline-org { font-size: 10px; font-weight: 900; text-transform: uppercase; letter-spacing: 1px; color: var(--accent); }
.timeline-date { font-size: 10px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; }
.timeline-role { font-size: 16px; font-weight: 700; }
.timeline-place { font-size: 12px; color: var(--text-muted); margin-top: 2px; }
.timeline-toggle { width: 28px; height: 28px; border-radius: 6px; background: var(--bg-alt); border: none; color: var(--text-muted); font-size: 16px; cursor: pointer; display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: all 0.2s; }
.timeline-body { padding: 0 20px 20px; display: none; }
.timeline-body.open { display: block; animation: slideDown 0.3s ease; }
.timeline-quote { background: var(--accent-soft); border-left: 3px solid var(--accent); padding: 12px 16px; border-radius: 0 8px 8px 0; margin-bottom: 16px; font-style: italic; font-size: 13px; color: var(--accent-text); }
.timeline-achievements { list-style: none; padding: 0; }
.timeline-achievements li { display: flex; gap: 12px; margin-bottom: 12px; font-size: 13px; }
.timeline-achievements li::before { content: ''; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; margin-top: 6px; flex-shrink: 0; }
.timeline-achievements strong { color: var(--text); }

/* ===== PROJECTS ===== */
.filter-bar { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.pfilter { padding: 6px 14px; border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--text-soft); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; cursor: pointer; transition: all 0.15s; }
.pfilter:hover { border-color: var(--border-hover); color: var(--text); }
.pfilter.active { background: var(--red); border-color: var(--red); color: white; }
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.project-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); transition: all 0.2s; }
.project-card:hover { border-color: var(--red); transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.project-body { padding: 20px; cursor: pointer; }
.project-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.project-icon { width: 36px; height: 36px; border-radius: 8px; background: var(--red-soft); display: flex; align-items: center; justify-content: center; font-size: 16px; }
.project-meta { display: flex; gap: 8px; align-items: center; }
.project-platform { font-size: 9px; font-weight: 700; padding: 3px 8px; border-radius: 4px; background: var(--accent-soft); color: var(--accent-text); border: 1px solid rgba(13,148,136,0.15); }
.project-live { font-size: 9px; font-weight: 700; color: #059669; display: flex; align-items: center; gap: 3px; }
.project-title { font-size: 15px; font-weight: 700; }
.project-sub { font-size: 11px; color: var(--text-muted); margin-bottom: 10px; }
.project-tech { display: flex; gap: 6px; }
.project-tech span { font-size: 10px; font-weight: 600; color: var(--text-muted); background: var(--bg-alt); padding: 3px 8px; border-radius: 4px; }
.project-detail { padding: 0 20px 20px; display: none; }
.project-detail.open { display: block; animation: slideDown 0.3s ease; }
.project-detail p { font-size: 12px; color: var(--text-soft); line-height: 1.6; margin-bottom: 12px; }
.project-highlights { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 16px; }
.project-highlights span { font-size: 11px; color: var(--text-soft); display: flex; align-items: center; gap: 4px; }
.project-link { display: inline-flex; align-items: center; gap: 6px; font-size: 11px; font-weight: 700; padding: 8px 16px; border-radius: 8px; background: var(--red-soft); color: var(--red); border: 1px solid rgba(225,29,72,0.15); }
.project-link:hover { background: rgba(225,29,72,0.1); }

/* ===== AI SHOWCASE ===== */
.tabs { display: flex; gap: 8px; margin-bottom: 32px; }
.tab-btn { padding: 10px 20px; border-radius: 10px; border: 1px solid var(--border); background: transparent; color: var(--text-soft); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; cursor: pointer; transition: all 0.15s; }
.tab-btn:hover { border-color: var(--border-hover); color: var(--text); }
.tab-btn.active { background: var(--accent); border-color: var(--accent); color: white; }
.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.3s ease; }
.metrics-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; margin-bottom: 32px; }
.metric { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: center; box-shadow: var(--shadow); transition: all 0.2s; }
.metric:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.metric-num { font-size: 24px; font-weight: 900; color: var(--accent); }
.metric-label { font-size: 9px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-top: 6px; }
.pipeline { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow); }
.pipeline h3 { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 20px; }
.pipeline-steps { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.pipeline-step { background: var(--accent-soft); border: 1px solid rgba(13,148,136,0.15); color: var(--accent-text); padding: 10px 18px; border-radius: 8px; font-size: 12px; font-weight: 700; white-space: nowrap; }
.pipeline-arrow { color: var(--text-muted); font-size: 14px; }

.constraints-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.constraint { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); transition: all 0.2s; }
.constraint:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.constraint-icon { width: 40px; height: 40px; border-radius: 8px; background: var(--accent-soft); display: flex; align-items: center; justify-content: center; font-size: 18px; margin-bottom: 12px; }
.constraint h4 { font-size: 14px; font-weight: 700; margin-bottom: 8px; }
.constraint p { font-size: 12px; color: var(--text-soft); line-height: 1.6; }

.before-after { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.before, .after { border-radius: var(--radius); padding: 28px; }
.before { background: var(--red-soft); border: 1px solid rgba(225,29,72,0.12); }
.after { background: var(--accent-soft); border: 1px solid rgba(13,148,136,0.12); }
.before h4 { font-size: 11px; font-weight: 700; text-transform: uppercase; color: var(--red); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.after h4 { font-size: 11px; font-weight: 700; text-transform: uppercase; color: var(--accent-text); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.before blockquote, .after blockquote { background: var(--card); padding: 16px; border-radius: 8px; font-size: 13px; font-style: italic; line-height: 1.6; margin-bottom: 16px; }
.before blockquote { border: 1px solid rgba(225,29,72,0.1); color: var(--text-soft); }
.after blockquote { border: 1px solid rgba(13,148,136,0.1); color: var(--text); }
.before ul, .after ul { list-style: none; padding: 0; }
.before ul li, .after ul li { font-size: 11px; display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.before ul li { color: var(--red); }
.after ul li { color: var(--accent-text); }

.nike-mode { grid-column: 1 / -1; background: var(--amber-soft); border: 1px solid rgba(217,119,6,0.12); border-radius: var(--radius); padding: 28px; }
.nike-mode h4 { font-size: 11px; font-weight: 700; text-transform: uppercase; color: var(--amber); margin-bottom: 4px; }
.nike-mode p { font-size: 12px; color: var(--text-soft); margin-bottom: 16px; }
.nike-lines { display: flex; flex-wrap: wrap; gap: 12px 24px; }
.nike-lines span { font-size: 14px; font-weight: 700; color: #92400e; letter-spacing: 0.3px; }

/* ===== BOOK ===== */
.book-layout { display: grid; grid-template-columns: 3fr 2fr; gap: 32px; }
.book-part { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; margin-bottom: 12px; box-shadow: var(--shadow); }
.book-part-header { padding: 16px 20px; display: flex; align-items: center; gap: 12px; cursor: pointer; }
.book-part-icon { width: 36px; height: 36px; border-radius: 8px; background: var(--amber-soft); display: flex; align-items: center; justify-content: center; font-size: 16px; }
.book-part h4 { font-size: 14px; font-weight: 700; flex: 1; }
.book-part-body { padding: 0 20px 16px; display: none; }
.book-part-body.open { display: block; animation: slideDown 0.3s ease; }
.chapter { display: flex; gap: 10px; align-items: flex-start; background: var(--bg-alt); padding: 10px 14px; border-radius: 8px; margin-bottom: 8px; }
.chapter-num { width: 24px; height: 24px; border-radius: 6px; background: var(--amber-soft); color: var(--amber); display: flex; align-items: center; justify-content: center; font-size: 10px; font-weight: 900; flex-shrink: 0; }
.chapter p { font-size: 12px; color: var(--text-soft); line-height: 1.5; }
.book-concepts { position: sticky; top: 80px; }
.book-concepts h3 { font-size: 11px; font-weight: 900; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.concept-btn { display: block; width: 100%; text-align: left; padding: 10px 14px; border-radius: 8px; border: none; background: transparent; color: var(--text-soft); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; cursor: pointer; transition: all 0.15s; margin-bottom: 4px; }
.concept-btn:hover { background: var(--bg-alt); color: var(--text); }
.concept-btn.active { background: var(--amber-soft); color: #92400e; border: 1px solid rgba(217,119,6,0.1); }
.concept-detail { background: var(--bg-alt); border: 1px solid var(--border); border-radius: 8px; padding: 16px; margin-top: 12px; }
.concept-detail h4 { font-size: 14px; font-weight: 700; margin-bottom: 8px; }
.concept-detail p { font-size: 12px; color: var(--text-soft); line-height: 1.6; }

/* ===== SKILLS ===== */
.edu-card { display: flex; gap: 16px; background: linear-gradient(90deg, var(--accent-soft), transparent); border: 1px solid rgba(13,148,136,0.1); border-radius: var(--radius); padding: 24px; margin-bottom: 24px; }
.edu-icon { width: 48px; height: 48px; border-radius: 12px; background: var(--accent-soft); border: 1px solid rgba(13,148,136,0.15); display: flex; align-items: center; justify-content: center; font-size: 22px; flex-shrink: 0; }
.edu-card h3 { font-size: 16px; font-weight: 700; }
.edu-degree { font-size: 13px; font-weight: 600; color: var(--accent); }
.edu-period { font-size: 11px; color: var(--text-muted); margin: 4px 0 8px; }
.edu-card p { font-size: 12px; color: var(--text-soft); }
.skills-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.skill-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.skill-card h4 { font-size: 10px; font-weight: 900; text-transform: uppercase; letter-spacing: 1px; color: var(--text); margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.skill-card h4 .icon { color: var(--accent); }
.skill-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.skill-tags span { font-size: 11px; font-weight: 600; color: var(--text-soft); background: var(--bg-alt); padding: 4px 10px; border-radius: 6px; border: 1px solid var(--border); }

/* ===== PAPERS ===== */
.papers-list { display: flex; flex-direction: column; gap: 12px; }
.paper { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); transition: all 0.2s; }
.paper:hover { border-color: var(--violet); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.paper-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; margin-bottom: 8px; }
.paper-title { display: flex; gap: 12px; align-items: flex-start; }
.paper-icon { width: 32px; height: 32px; border-radius: 8px; background: var(--violet-soft); display: flex; align-items: center; justify-content: center; font-size: 14px; flex-shrink: 0; }
.paper h3 { font-size: 13px; font-weight: 700; }
.paper-meta { display: flex; gap: 8px; margin-top: 4px; }
.paper-type { font-size: 9px; font-weight: 700; text-transform: uppercase; background: var(--violet-soft); color: var(--violet); padding: 2px 8px; border-radius: 4px; }
.paper-year { font-size: 11px; color: var(--text-muted); }
.paper p { font-size: 12px; color: var(--text-soft); line-height: 1.5; padding-left: 44px; }

/* ===== EDITING GUIDE ===== */
.edit-guide { padding: 40px 0; }
.edit-guide details { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.edit-guide summary { cursor: pointer; list-style: none; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 24px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 16px; }
.edit-guide summary::-webkit-details-marker { display: none; }
.edit-guide summary h3 { font-size: 14px; font-weight: 700; flex: 1; }
.edit-guide summary small { font-size: 11px; color: var(--text-muted); }
.guide-steps { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; padding: 20px 0; }
.step { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.step-num { width: 28px; height: 28px; border-radius: 8px; background: var(--accent-soft); color: var(--accent); display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: 900; margin-bottom: 10px; }
.step h4 { font-size: 13px; font-weight: 700; margin-bottom: 6px; }
.step p { font-size: 11px; color: var(--text-soft); line-height: 1.5; }

/* ===== CONTACT ===== */
.contact-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; max-width: 800px; margin: 0 auto 24px; }
.contact-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; text-align: left; box-shadow: var(--shadow); transition: all 0.2s; }
.contact-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.contact-card .icon { font-size: 18px; margin-bottom: 8px; display: block; color: var(--accent); }
.contact-card small { font-size: 9px; font-weight: 900; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); }
.contact-card a { font-size: 13px; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 4px; }
.location { color: var(--text-muted); font-size: 13px; }

/* ===== FOOTER ===== */
footer { text-align: center; padding: 40px 24px; border-top: 1px solid var(--border); }
footer p { font-size: 11px; color: var(--text-muted); }

/* ===== RESUME MODAL ===== */
.modal { position: fixed; inset: 0; z-index: 2000; background: rgba(0,0,0,0.5); backdrop-filter: blur(4px); display: flex; align-items: center; justify-content: center; padding: 20px; }
.modal-content { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); width: 100%; max-width: 700px; max-height: 90vh; display: flex; flex-direction: column; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 20px 24px; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 16px; }
.modal-header p { font-size: 11px; color: var(--text-muted); }
.close-btn { width: 32px; height: 32px; border-radius: 8px; border: none; background: var(--bg-alt); color: var(--text-muted); font-size: 20px; cursor: pointer; }
.close-btn:hover { background: var(--border); }
.modal-tabs { display: flex; gap: 8px; padding: 16px 24px; border-bottom: 1px solid var(--border); overflow-x: auto; }
.rtab { padding: 8px 16px; border-radius: 8px; border: 1px solid var(--border); background: transparent; color: var(--text-soft); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; cursor: pointer; white-space: nowrap; }
.rtab:hover { border-color: var(--border-hover); color: var(--text); }
.rtab.active { background: var(--accent); border-color: var(--accent); color: white; }
.keywords { padding: 12px 24px; border-bottom: 1px solid var(--border); background: var(--bg-alt); }
.keywords small { display: block; font-size: 9px; font-weight: 900; text-transform: uppercase; letter-spacing: 1px; color: var(--text-muted); margin-bottom: 8px; }
.kw-list { display: flex; flex-wrap: wrap; gap: 6px; }
.kw-list span { font-size: 9px; font-weight: 700; background: var(--accent-soft); color: var(--accent-text); padding: 3px 8px; border-radius: 4px; border: 1px solid rgba(13,148,136,0.1); }
.resume-preview { flex: 1; overflow-y: auto; padding: 20px 24px; font-size: 11px; font-family: 'Courier New', monospace; line-height: 1.7; color: var(--text-soft); white-space: pre-wrap; max-height: 400px; }
.modal-actions { display: flex; gap: 12px; padding: 16px 24px; border-top: 1px solid var(--border); }
.modal-actions button { flex: 1; padding: 12px; border-radius: 10px; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; cursor: pointer; border: none; }

/* ===== ANIMATIONS ===== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.5s, transform 0.5s; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .hero-layout { flex-direction: column; }
  .hero-sidebar { width: 100%; height: auto; position: relative; border-right: none; border-bottom: 1px solid var(--border); padding: 40px 24px; }
  .hero-main { padding: 40px 24px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .book-layout { grid-template-columns: 1fr; }
  .before-after { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .menu-btn { display: block; }
}
@media (max-width: 640px) {
  .hero h1 { font-size: 40px; }
  .section h2 { font-size: 28px; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .constraints-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .guide-steps { grid-template-columns: 1fr; }
  .resume-btn { bottom: 16px; right: 16px; padding: 10px 14px; font-size: 11px; }
}