:root {
  --bg-primary: #0a0a0a;
  --bg-card: #111;
  --bg-card-hover: rgba(255,255,255,0.03);
  --bg-item: rgba(255,255,255,0.02);
  --bg-tooltip: #1a1a1a;
  --bg-logo: #fff;
  --bg-toggle: #1a1a1a;
  --text-primary: #e0e0e0;
  --text-secondary: #888;
  --text-tertiary: #666;
  --text-heading: #ddd;
  --text-card: #ccc;
  --text-white: #fff;
  --accent: #f9bf4b;
  --accent-rgb: 249,191,75;
  --border-primary: #2a2a2a;
  --border-card: #222;
  --border-logo: #333;
  --border-accent: rgba(249,191,75,0.3);
  --border-accent-hover: rgba(249,191,75,0.2);
  --shadow-card: rgba(0,0,0,0.3);
  --shadow-card-hover: rgba(0,0,0,0.4);
  --shadow-tooltip: rgba(0,0,0,0.5);
  --footer-color: #444;
  --footer-link: #666;
  --rec-btn-border: #333;
  --rec-btn-color: #888;
  --rec-btn-hover: #ccc;
  --rec-btn-border-hover: #666;
}

[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-card: rgba(0,0,0,0.03);
  --bg-card-hover: rgba(0,0,0,0.05);
  --bg-item: rgba(0,0,0,0.02);
  --bg-tooltip: #ffffff;
  --bg-logo: #ffffff;
  --bg-toggle: #f0f0f0;
  --text-primary: #111111;
  --text-secondary: #555555;
  --text-tertiary: #777777;
  --text-heading: #222222;
  --text-card: #333333;
  --text-white: #000000;
  --accent: #f9bf4b;
  --accent-rgb: 249,191,75;
  --border-primary: #d5d5d5;
  --border-card: #c0c0c0;
  --border-logo: #aaa;
  --border-accent: rgba(249,191,75,0.45);
  --border-accent-hover: rgba(249,191,75,0.25);
  --shadow-card: rgba(0,0,0,0.12);
  --shadow-card-hover: rgba(0,0,0,0.2);
  --shadow-tooltip: rgba(0,0,0,0.2);
  --footer-color: #888;
  --footer-link: #777;
  --rec-btn-border: #c0c0c0;
  --rec-btn-color: #555;
  --rec-btn-hover: #222;
  --rec-btn-border-hover: #aaa;
}
[data-theme=light] .header-row1 .logo img { filter: brightness(0) invert(0.15); }
[data-theme=light] .rec-avatar { background: #f5f5f5; border-color: #ddd; }
[data-theme=light] .edu-logo { border: 1px solid #ddd; }

* { margin: 0; padding: 0; box-sizing: border-box; }
body { background: var(--bg-primary); color: var(--text-primary); font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; line-height: 1.6; transition: background 0.3s ease, color 0.3s ease; }
.container { max-width: 900px; margin: 0 auto; padding: 0 24px; }

header { padding: 1px 0; border-bottom: 1px solid var(--border-primary); position: relative; }
.header-row1 { display: flex; flex-direction: row; justify-content: center; align-items: center; gap: 40px; margin-bottom: 1px; }
.header-row1 .logo { display: flex; align-items: center; justify-content: center; }
.header-row1 .logo img { width: 200px; height: auto; object-fit: contain; }
.header-row1 .tagline { text-align: center; }
.header-row1 .tagline h1 { font-size: 1rem; font-weight: 400; color: var(--text-white); letter-spacing: 2px; text-transform: uppercase; }
.header-row1 .tagline p { margin-top: 8px; color: var(--text-secondary); font-size: 0.9rem; line-height: 1.5; }

.theme-toggle {
  position: absolute; top: 12px; right: 24px;
  background: var(--bg-toggle); border: 1px solid var(--border-card);
  border-radius: 8px; padding: 8px 12px; cursor: pointer;
  font-size: 1.1rem; line-height: 1; transition: all 0.3s ease;
  display: flex; align-items: center; gap: 6px;
}
.theme-toggle:hover { border-color: var(--accent); }
.theme-toggle .toggle-icon { transition: transform 0.3s ease; }

section { padding: 40px 0; border-bottom: 1px solid var(--border-primary); }
section:last-child { border-bottom: none; }
h2 { font-size: 1.4rem; font-weight: 600; color: var(--accent); margin-bottom: 20px; letter-spacing: 1px; display: flex; align-items: center; gap: 12px; }
h2::before { content: ''; width: 4px; height: 24px; background: var(--accent); border-radius: 2px; }

.exp-item { margin-bottom: 24px; padding: 14px; background: var(--bg-item); border-radius: 10px; border: 1px solid var(--border-card); transition: all 0.3s ease; }
.exp-item:hover { border-color: var(--border-accent-hover); background: var(--bg-card-hover); }
.exp-item .exp-header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.exp-item .company-logo { width: 30px; height: 30px; background: var(--bg-card); border: 1px solid var(--border-logo); border-radius: 6px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.exp-item .company-logo span { font-size: 0.6rem; color: var(--text-secondary); font-weight: 600; }
.exp-item h3 { font-size: 0.95rem; color: var(--text-heading); flex: 1; }
.exp-item .company { font-size: 0.85rem; color: var(--accent); margin-bottom: 2px; font-weight: 600; }
.exp-item .period { font-size: 0.75rem; color: var(--text-tertiary); margin-bottom: 6px; }
.exp-item p { font-size: 0.8rem; line-height: 1.6; color: var(--text-secondary); }
.exp-item .clients { font-size: 0.7rem; color: var(--text-tertiary); margin-top: 8px; font-style: italic; display: flex; align-items: center; gap: 6px; }
.exp-item .clients::before { content: '◆'; color: var(--accent); font-size: 0.5rem; }
.exp-item ul { list-style: none; padding: 0; }
.exp-item ul li { font-size: 0.8rem; line-height: 1.6; color: var(--text-secondary); padding: 3px 0; padding-left: 16px; position: relative; }
.exp-item ul li::before { content: '–'; position: absolute; left: 0; color: var(--accent); }
.exp-item .achievements { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border-primary); }
.exp-item .achievements h4 { font-size: 0.8rem; color: var(--accent); margin-bottom: 6px; }
.exp-item .achievements ul li::before { content: '★'; color: var(--accent); }

.cert-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
.cert-card { background: var(--bg-card); border: 1px solid var(--border-card); border-radius: 10px; padding: 14px; text-align: center; transition: all 0.3s ease; }
.cert-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: 0 6px 20px var(--shadow-card); }
.cert-card img { width: 44px; height: 44px; margin-bottom: 8px; border-radius: 8px; object-fit: contain; }
.cert-card h3 { font-size: 0.75rem; color: var(--text-card); font-weight: 500; line-height: 1.4; }

.gallup-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.gallup-card {
    background: var(--bg-card); border: 1px solid var(--border-card); border-radius: 10px; padding: 18px 14px;
    text-align: center; transition: all 0.3s ease; cursor: default; position: relative;
}
.gallup-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: 0 6px 20px var(--shadow-card); }
.gallup-card h3 { font-size: 0.85rem; color: var(--text-card); font-weight: 500; }
.gallup-card .tooltip {
    display: none; position: absolute; bottom: calc(100% + 10px); left: 50%; transform: translateX(-50%);
    background: var(--bg-tooltip); border: 1px solid var(--accent); border-radius: 8px; padding: 12px 16px;
    font-size: 0.75rem; color: var(--text-primary); line-height: 1.5; width: 220px; z-index: 10;
    box-shadow: 0 8px 24px var(--shadow-tooltip);
}
.gallup-card .tooltip::after {
    content: ''; position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
    border: 6px solid transparent; border-top-color: var(--accent);
}
.gallup-card:hover .tooltip { display: block; }

.project-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.project-card {
    background: var(--bg-card); border: 1px solid var(--border-card); border-radius: 10px; padding: 20px 16px;
    text-align: center; transition: all 0.3s ease; text-decoration: none;
    display: flex; align-items: center; justify-content: center; min-height: 80px;
}
.project-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: 0 6px 20px var(--shadow-card); }
.project-card h3 { font-size: 0.85rem; color: var(--text-primary); line-height: 1.4; transition: color 0.3s ease; }
.project-card:hover h3 { color: var(--accent); }
.project-card.more { border-style: dashed; }
.project-card.more h3 { color: var(--accent); }

.rec-quote-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 16px; }
.rec-quote-card {
    background: var(--bg-card); border: 1px solid var(--border-card); border-radius: 10px; padding: 20px 16px;
    transition: all 0.3s ease; text-decoration: none; display: flex; flex-direction: column;
}
.rec-quote-card:hover { border-color: var(--border-accent); }
.rec-quote-card .quote-text { font-size: 0.8rem; color: var(--text-card); line-height: 1.5; font-style: italic; margin-bottom: 12px; flex: 1; }
.rec-quote-card .quote-text::before { content: '"'; color: var(--accent); font-size: 1.2rem; }
.rec-quote-card .quote-text::after { content: '"'; color: var(--accent); font-size: 1.2rem; }
.rec-quote-card .quote-author { font-size: 0.75rem; color: var(--text-secondary); font-weight: 500; }
.rec-quote-card.more { border-style: dashed; align-items: center; justify-content: center; cursor: pointer; }
.rec-quote-card.more .quote-text { display: none; }
.rec-quote-card.more .quote-author { color: var(--accent); font-size: 0.85rem; }

.services-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 16px; }
.service-card { background: var(--bg-card); border: 1px solid var(--border-card); border-radius: 10px; padding: 18px; transition: all 0.3s ease; display: flex; flex-direction: column; }
.service-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: 0 10px 28px var(--shadow-card-hover); }
.service-card h3 { font-size: 0.9rem; color: var(--accent); margin-bottom: 6px; }
.service-card p { font-size: 0.75rem; color: var(--text-secondary); margin-bottom: 10px; line-height: 1.4; flex: 1; }
.service-card a { color: var(--accent); text-decoration: none; font-size: 0.75rem; padding: 5px 12px; border: 1px solid var(--border-accent); border-radius: 6px; display: inline-block; transition: all 0.2s ease; margin-top: auto; align-self: flex-start; }
.service-card a:hover { background: rgba(var(--accent-rgb),0.1); border-color: var(--accent); }

.edu-grid { display: flex; gap: 20px; align-items: center; }
.edu-logo { width: 70px; height: 70px; background: var(--bg-logo); border-radius: 12px; padding: 8px; flex-shrink: 0; }
.edu-logo img { width: 100%; height: 100%; object-fit: contain; }
.edu-info h3 { font-size: 1rem; color: var(--text-heading); margin-bottom: 4px; }
.edu-info .company { font-size: 0.85rem; color: var(--accent); margin-bottom: 2px; font-weight: 600; }
.edu-info .period { font-size: 0.75rem; color: var(--text-tertiary); margin-bottom: 6px; }
.edu-info p { font-size: 0.8rem; color: var(--text-secondary); }

footer { padding: 32px 0; text-align: center; color: var(--footer-color); font-size: 0.8rem; }
footer a { color: var(--footer-link); text-decoration: none; transition: color 0.2s; }
footer a:hover { color: var(--accent); }

.back-link { display: inline-block; margin-bottom: 20px; color: var(--accent); text-decoration: none; font-size: 0.85rem; padding: 8px 16px; border: 1px solid var(--border-accent); border-radius: 8px; transition: all 0.3s ease; }
.back-link:hover { background: rgba(var(--accent-rgb),0.1); border-color: var(--accent); }

.nav-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.nav-card {
    background: var(--bg-card); border: 1px solid var(--border-card); border-radius: 12px; padding: 28px 16px;
    text-align: center; transition: all 0.3s ease; cursor: pointer; text-decoration: none;
    display: flex; align-items: center; justify-content: center; min-height: 120px;
}
.nav-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: 0 6px 20px var(--shadow-card); }
.nav-card h3 { font-size: 0.85rem; color: var(--text-primary); line-height: 1.4; transition: color 0.3s ease; }
.nav-card:hover h3 { color: var(--accent); }

.rec-card {
    background: var(--bg-card); border: 1px solid var(--border-card); border-radius: 12px; padding: 24px;
    margin-bottom: 16px; transition: all 0.3s ease;
}
.rec-card:hover { border-color: var(--border-accent-hover); }
.rec-header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.rec-avatar {
    width: 48px; height: 48px; border-radius: 50%; background: var(--bg-toggle);
    border: 1px solid var(--border-logo); display: flex; align-items: center; justify-content: center;
    font-size: 1.1rem; font-weight: 600; color: var(--accent); flex-shrink: 0;
}
.rec-info h3 { font-size: 0.95rem; color: var(--text-white); font-weight: 600; }
.rec-info .role { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.3; }
.rec-text { font-size: 0.85rem; color: var(--text-card); line-height: 1.6; margin-bottom: 14px; }
.rec-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.rec-btn {
    font-size: 0.75rem; padding: 6px 14px; border-radius: 6px; cursor: pointer;
    transition: all 0.2s ease; text-decoration: none; display: inline-flex; align-items: center; gap: 6px;
}
.rec-btn-link {
    background: transparent; border: 1px solid var(--border-accent); color: var(--accent);
}
.rec-btn-link:hover { background: rgba(var(--accent-rgb),0.1); border-color: var(--accent); }
.rec-btn-original {
    background: transparent; border: 1px solid var(--rec-btn-border); color: var(--rec-btn-color);
}
.rec-btn-original:hover { border-color: var(--rec-btn-border-hover); color: var(--rec-btn-hover); }
.rec-original {
    display: none; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border-primary);
    font-size: 0.8rem; color: var(--text-secondary); line-height: 1.6; font-style: italic;
}
.rec-original.show { display: block; }

.slide-view { padding: 40px 0; text-align: center; }
.slide-view h2 { font-size: 1.4rem; font-weight: 600; color: var(--accent); margin-bottom: 24px; letter-spacing: 1px; display: flex; align-items: center; justify-content: center; gap: 12px; }
.slide-view h2::before { content: ''; width: 4px; height: 24px; background: var(--accent); border-radius: 2px; }
.content-wrapper { position: relative; display: inline-block; }
.content-img { width: 100%; max-width: 900px; display: block; border-radius: 12px; border: 1px solid var(--border-primary); }
.content-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: transparent; z-index: 1; }

.slide-nav { padding: 24px 0; }
nav { padding-top: 40px; }
.nav-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.nav-links a {
    background: var(--bg-card); border: 1px solid var(--border-card); border-radius: 8px; padding: 8px 14px;
    font-size: 0.75rem; color: var(--text-card); text-decoration: none; transition: all 0.3s ease;
}
.nav-links a:hover, .nav-links a.active { border-color: var(--accent); color: var(--accent); }

@media (max-width: 700px) {
    .header-row1 { flex-direction: column; gap: 20px; }
    .header-row1 .logo img { width: 160px; }
    .services-grid, .cert-grid, .project-grid, .gallup-grid, .rec-quote-grid { grid-template-columns: 1fr; }
    .edu-grid { flex-direction: column; align-items: flex-start; }
    header { padding: 1px 0; }
    section { padding: 32px 0; }
    .nav-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
    .theme-toggle { top: 12px; right: 12px; }
}