/* ============================================
   Design Tokens
   ============================================ */
:root,
[data-theme="light"] {
    --bg-primary: #f4f6fb;
    --bg-secondary: #ffffff;
    --bg-elevated: #ffffff;
    --bg-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #6B8DD6 100%);
    --text-primary: #1a1d26;
    --text-secondary: #5a6178;
    --text-muted: #8b92a8;
    --text-inverse: #ffffff;
    --accent: #6366f1;
    --accent-hover: #4f46e5;
    --accent-soft: rgba(99, 102, 241, 0.12);
    --accent-glow: rgba(99, 102, 241, 0.35);
    --border: #e2e8f0;
    --border-hover: #c7d2fe;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
    --navbar-bg: rgba(255, 255, 255, 0.85);
    --tag-bg: #eef2ff;
    --tag-text: #4338ca;
    --success: #10b981;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 1100px;
}

[data-theme="dark"] {
    --bg-primary: #0f1117;
    --bg-secondary: #1a1d27;
    --bg-elevated: #22263a;
    --bg-hero: linear-gradient(135deg, #1e1b4b 0%, #312e81 40%, #4338ca 100%);
    --text-primary: #f1f3f9;
    --text-secondary: #a0a8c0;
    --text-muted: #6b7394;
    --text-inverse: #ffffff;
    --accent: #818cf8;
    --accent-hover: #a5b4fc;
    --accent-soft: rgba(129, 140, 248, 0.15);
    --accent-glow: rgba(129, 140, 248, 0.3);
    --border: #2d3348;
    --border-hover: #4c5280;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
    --navbar-bg: rgba(15, 17, 23, 0.9);
    --tag-bg: rgba(129, 140, 248, 0.15);
    --tag-text: #a5b4fc;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    transition: background-color var(--transition), color var(--transition);
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-hover);
}

img {
    max-width: 100%;
    display: block;
}

/* ============================================
   Navbar
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--navbar-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-sm);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 16px;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.15rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

.nav-logo:hover {
    color: var(--accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 4px;
    align-items: center;
}

.nav-link {
    display: block;
    padding: 8px 14px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
    background: var(--accent-soft);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    transition: border-color var(--transition), background var(--transition);
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--accent);
    background: var(--accent-soft);
}

[data-theme="dark"] .theme-icon-sun { display: inline; }
[data-theme="dark"] .theme-icon-moon { display: none; }
[data-theme="light"] .theme-icon-sun,
:root:not([data-theme="dark"]) .theme-icon-sun { display: none; }
[data-theme="light"] .theme-icon-moon,
:root:not([data-theme="dark"]) .theme-icon-moon { display: inline; }

/* ============================================
   Hero
   ============================================ */
.hero {
    position: relative;
    padding: 140px 24px 80px;
    text-align: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: var(--bg-hero);
    z-index: 0;
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 80%, rgba(255,255,255,0.05) 0%, transparent 40%);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.profile-pic {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid rgba(255, 255, 255, 0.25);
    margin: 0 auto 24px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: transform 0.4s ease;
}

.profile-pic:hover {
    transform: scale(1.05);
}

.hero-greeting {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.75);
    font-weight: 400;
    margin-bottom: 8px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    color: var(--text-inverse);
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 12px;
}

.tagline {
    font-size: clamp(1rem, 2.5vw, 1.25rem);
    color: rgba(255, 255, 255, 0.85);
    font-weight: 400;
    margin-bottom: 8px;
}

.hero-location {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 32px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 36px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    font-family: var(--font);
}

.btn-primary {
    background: #ffffff;
    color: #4338ca;
    border-color: #ffffff;
}

.btn-primary:hover {
    background: transparent;
    color: #ffffff;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: transparent;
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.4);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: #ffffff;
    transform: translateY(-2px);
}

.btn-full {
    width: 100%;
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.contact-chip {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 10px 18px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    backdrop-filter: blur(8px);
    transition: background var(--transition), transform var(--transition);
    color: #ffffff;
}

.contact-chip:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: translateY(-2px);
    color: #ffffff;
}

.chip-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.7;
    margin-bottom: 2px;
}

.chip-value {
    font-size: 0.85rem;
    font-weight: 500;
}

/* ============================================
   Sections
   ============================================ */
.content-wrapper {
    padding: 20px 24px 60px;
    max-width: var(--max-width);
    margin: 0 auto;
}

.section {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
    transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.section-header {
    margin-bottom: 28px;
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: 8px;
}

.section h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.lead {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ============================================
   Timeline
   ============================================ */
.timeline-item {
    display: flex;
    gap: 20px;
    margin-bottom: 28px;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-marker {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
    margin-top: 8px;
    flex-shrink: 0;
}

.timeline-content h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.date-range {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 10px;
    display: block;
}

.highlight-badge {
    display: inline-block;
    background: var(--accent-soft);
    color: var(--accent);
    font-weight: 700;
    font-size: 0.875rem;
    padding: 4px 14px;
    border-radius: var(--radius-full);
    margin-bottom: 12px;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
}

.timeline-content ul li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 6px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.timeline-content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ============================================
   Awards
   ============================================ */
.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.award-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.award-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.award-year {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-soft);
    padding: 3px 10px;
    border-radius: var(--radius-full);
    margin-bottom: 10px;
}

.award-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.award-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ============================================
   Skills
   ============================================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
}

.skill-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: border-color var(--transition), transform var(--transition);
}

.skill-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.skill-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    display: inline-block;
    font-size: 0.78rem;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: var(--radius-full);
    background: var(--tag-bg);
    color: var(--tag-text);
    transition: transform var(--transition);
}

.tag:hover {
    transform: scale(1.05);
}

/* ============================================
   Projects
   ============================================ */
.filter-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 28px;
}

.filter-btn {
    padding: 8px 18px;
    font-size: 0.85rem;
    font-weight: 500;
    font-family: var(--font);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--bg-elevated);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.filter-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.filter-btn.active {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 16px;
}

.project-card {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.project-card.hidden {
    display: none;
}

.project-card-header {
    position: relative;
}

.project-category {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent);
    margin-bottom: 6px;
}

.project-badge {
    position: absolute;
    top: 0;
    right: 0;
    font-size: 0.7rem;
    font-weight: 700;
    background: var(--success);
    color: #ffffff;
    padding: 3px 10px;
    border-radius: var(--radius-full);
}

.project-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}

.project-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.65;
    flex-grow: 1;
}

.project-links {
    display: flex;
    gap: 12px;
    margin-top: auto;
}

.project-links a {
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    transition: all var(--transition);
}

.project-links a:hover {
    background: var(--accent);
    color: #ffffff;
    border-color: var(--accent);
}

.project-note {
    margin-top: auto;
    font-size: 0.8rem;
    font-style: italic;
    color: var(--text-muted);
}

.projects-empty {
    text-align: center;
    color: var(--text-muted);
    padding: 40px 0;
    font-size: 0.95rem;
}

/* ============================================
   Footer / Contact
   ============================================ */
.site-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 24px;
}

.footer-content {
    text-align: center;
}

.footer-content .section-header {
    text-align: center;
}

.footer-lead {
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.contact-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    max-width: 560px;
    margin: 0 auto 36px;
}

.contact-action {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 20px;
    min-width: 240px;
    max-width: 100%;
    flex: 1 1 240px;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-align: left;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.contact-action:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
    color: var(--text-primary);
}

.contact-action-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
}

.contact-action-icon svg {
    width: 22px;
    height: 22px;
    display: block;
}

.contact-action-email .contact-action-icon {
    background: var(--accent-soft);
    color: var(--accent);
}

.contact-action-whatsapp .contact-action-icon {
    background: rgba(37, 211, 102, 0.15);
    color: #25d366;
}

.contact-action-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
}

.contact-action-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-muted);
}

.contact-action-value {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.contact-form {
    max-width: 560px;
    margin: 0 auto 32px;
    text-align: left;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.95rem;
    font-family: var(--font);
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input.error,
.form-group textarea.error {
    border-color: #ef4444;
}

.thank-you-box {
    max-width: 480px;
    margin: 0 auto 32px;
    padding: 32px;
    background: var(--accent-soft);
    border: 1px solid var(--accent);
    border-radius: var(--radius-md);
    text-align: center;
}

.thank-you-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 8px;
}

.thank-you-box p {
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 24px;
}

.footer-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color var(--transition);
}

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

.copyright {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ============================================
   Scroll Reveal
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--navbar-bg);
        backdrop-filter: blur(16px);
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: transform var(--transition), opacity var(--transition);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-link {
        width: 100%;
        text-align: center;
        padding: 12px;
    }

    .hero {
        padding: 120px 20px 60px;
    }

    .section {
        padding: 28px 20px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .filter-tabs {
        gap: 6px;
    }

    .filter-btn {
        padding: 6px 14px;
        font-size: 0.8rem;
    }

    .contact-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .contact-action {
        min-width: 0;
        flex: 1 1 auto;
    }
}

@media (max-width: 480px) {
    .profile-pic {
        width: 120px;
        height: 120px;
    }

    .contact-chip {
        padding: 8px 14px;
    }

    .awards-grid {
        grid-template-columns: 1fr;
    }
}