/* ===========================================
   DESIGN TOKENS
   =========================================== */
:root {
    --color-bg: #fafafa;
    --color-bg-secondary: #ffffff;
    --color-surface: rgba(255, 255, 255, 0.7);
    --color-surface-hover: rgba(255, 255, 255, 0.9);
    --color-border: rgba(0, 0, 0, 0.08);
    --color-text-primary: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-text-tertiary: #86868b;
    --color-accent: #0071e3;
    --color-accent-hover: #0077ed;
    --color-accent-subtle: rgba(0, 113, 227, 0.1);
    --color-accent-glow: rgba(0, 113, 227, 0.25);
    --glass-bg: rgba(255, 255, 255, 0.6);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
    --backdrop-blur: blur(20px);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --gradient-text: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #0071e3 0%, #5856d6 100%);
}

[data-theme="dark"] {
    --color-bg: #000000;
    --color-bg-secondary: #0d0d0d;
    --color-surface: rgba(28, 28, 30, 0.7);
    --color-surface-hover: rgba(44, 44, 46, 0.9);
    --color-border: rgba(255, 255, 255, 0.1);
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-text-tertiary: #6e6e73;
    --color-accent: #2997ff;
    --color-accent-hover: #40a9ff;
    --color-accent-subtle: rgba(41, 151, 255, 0.15);
    --color-accent-glow: rgba(41, 151, 255, 0.3);
    --glass-bg: rgba(28, 28, 30, 0.6);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: var(--font-family);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    transition: background-color 0.5s ease, color 0.5s ease;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    border-radius: 18px;
    box-shadow: var(--glass-shadow);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
    position: relative;
    overflow: hidden;
}

.glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
}

[data-theme="dark"] .glass-card:hover {
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
}

/* ===========================================
   NAVBAR
   =========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    -webkit-backdrop-filter: var(--backdrop-blur);
    border-bottom: 1px solid var(--glass-border);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    text-decoration: none;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    transition: width 0.3s ease;
}

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

.nav-social {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    border-radius: 12px;
    transition: all 0.2s;
    background: transparent;
}

.social-link:hover {
    color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 12px;
    background: var(--color-surface);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-primary);
    transition: all 0.2s;
}

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

.theme-toggle .sun-icon {
    display: block;
}

.theme-toggle .moon-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .sun-icon {
    display: none;
}

[data-theme="dark"] .theme-toggle .moon-icon {
    display: block;
}

/* ===========================================
   HERO
   =========================================== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 8rem 1.5rem 4rem;
    position: relative;
    background: var(--color-bg);
}

.hero-bg-gradient {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 1000px;
    height: 600px;
    background: radial-gradient(ellipse at center, var(--color-accent-glow) 0%, transparent 70%);
    opacity: 0.5;
    pointer-events: none;
}

.hero-content {
    max-width: 800px;
    animation: fadeInUp 0.8s ease-out;
    position: relative;
    z-index: 1;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: #34c759;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}

.hero-title {}
}

.title-line {
    display: block;
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
}

.title-name {
    display: block;
    font-size: clamp(2.5rem, 8vw, 4.5rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--color-text-primary) 0%, var(--color-text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.hero-subtitle .highlight {
    color: var(--color-accent);
    font-weight: 500;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 3rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 14px;
    text-decoration: none;
    transition: all 0.25s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-accent);
    color: #ffffff;
    box-shadow: 0 4px 20px var(--color-accent-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--color-accent-glow);
}

.btn-secondary {
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    color: var(--color-text-primary);
    border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
    background: var(--color-surface-hover);
    transform: translateY(-2px);
}

/* Certifications */
.hero-certifications {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.cert-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    text-decoration: none;
    transition: all 0.25s ease;
}

.cert-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--color-accent);
}

[data-theme="dark"] .cert-card:hover {
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.cert-logo {
    width: 48px;
    height: 48px;
    border-radius: 8px;
}

.cert-info {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.cert-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

.cert-level {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.scroll-text {
    font-size: 0.75rem;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
    animation: scrollPulse 2s infinite;
}

@keyframes scrollPulse {

    0%,
    100% {
        opacity: 1;
        height: 40px;
    }

    50% {
        opacity: 0.5;
        height: 30px;
    }
}

/* ===========================================
   SECTIONS
   =========================================== */
.section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-label {
    display: inline-block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 2.75rem);
    font-weight: 700;
    letter-spacing: -0.02em;
}

/* About */
.about-section {
    background: var(--color-bg-secondary);
}

.about-content {
    display: grid;
    gap: 2.5rem;
}

.about-text {
    padding: 2.5rem;
}

.about-intro {
    font-size: 1.25rem;
    color: var(--color-text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.about-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.highlight-card {
    padding: 2rem;
    text-align: center;
}

.highlight-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-subtle);
    border-radius: 14px;
    color: var(--color-accent);
}

.highlight-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.highlight-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

/* Experience */
.experience-section {
    background: var(--color-bg);
}

.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 1.5rem;
}

.experience-card {
    padding: 2rem;
}

.card-glow {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity 0.3s;
}

.experience-card:hover .card-glow {
    opacity: 1;
}

.experience-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-subtle);
    border-radius: 14px;
    color: var(--color-accent);
    margin-bottom: 1.25rem;
}

.experience-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.experience-card p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    line-height: 1.7;
}

.experience-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: var(--color-accent-subtle);
    color: var(--color-accent);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: 999px;
}

/* Skills Modern */
.skills-section {
    background: var(--color-bg-secondary);
}

.skills-modern {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.skill-group-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.25rem;
}

.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.skill-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1.25rem;
    background: var(--glass-bg);
    backdrop-filter: var(--backdrop-blur);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-primary);
    transition: all 0.25s ease;
}

.skill-pill:hover {
    transform: translateY(-2px);
    border-color: var(--color-accent);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

[data-theme="dark"] .skill-pill:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.skill-pill i {
    font-size: 1.5rem;
}

.skill-pill svg {
    flex-shrink: 0;
    color: var(--color-accent);
}

.skill-pill.primary {
    background: var(--gradient-accent);
    color: #fff;
    border: none;
}

.skill-pill.primary i {
    color: #fff;
}

.pill-badge {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    background: rgba(255, 255, 255, 0.25);
    border-radius: 999px;
    font-weight: 600;
}

/* Focus */
.focus-section {
    background: var(--color-bg);
}

.focus-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.focus-card {
    padding: 2rem;
    position: relative;
    overflow: hidden;
}

.focus-number {
    font-size: 4rem;
    font-weight: 700;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.2;
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    line-height: 1;
}

.focus-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.focus-card p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* Contact */
.contact-section {
    background: var(--color-bg-secondary);
    padding: 6rem 0;
}

.contact-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-text {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: 2.5rem;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 2rem;
    text-decoration: none;
    color: var(--color-text-primary);
    font-weight: 500;
    min-width: 300px;
    justify-content: center;
}

.contact-link:hover {
    color: var(--color-accent);
}

.contact-link svg {
    color: var(--color-accent);
    flex-shrink: 0;
}

/* Footer */
.footer {
    padding: 2rem 0;
    text-align: center;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
}

.footer p {
    font-size: 0.875rem;
    color: var(--color-text-tertiary);
}

/* ===========================================
   RESPONSIVE
   =========================================== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero {
        padding: 7rem 1rem 3rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .hero-certifications {
        flex-direction: column;
        align-items: center;
    }

    .cert-card {
        width: 100%;
        max-width: 320px;
    }

    .section {
        padding: 4rem 0;
    }

    .experience-grid,
    .focus-grid,
    .about-highlights {
        grid-template-columns: 1fr;
    }

    .contact-link {
        min-width: auto;
        width: 100%;
        max-width: 400px;
    }

    .skill-pills {
        justify-content: center;
    }
}

@media (max-width: 480px) {

    .about-text,
    .experience-card,
    .focus-card,
    .highlight-card {
        padding: 1.5rem;
    }

    .title-line {
        font-size: 1.25rem;
    }
}

:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

::selection {
    background: var(--color-accent);
    color: #ffffff;
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
}