/* ================================================================
   DESIGN SYSTEM — Personal Developer Portfolio
   ================================================================ */

/* === CSS Custom Properties === */
:root {
    /* Colors - Dark Theme (Default) */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #12121a;
    --color-bg-tertiary: #1a1a28;
    --color-bg-card: rgba(22, 22, 35, 0.8);
    --color-bg-card-hover: rgba(30, 30, 48, 0.9);
    --color-bg-glass: rgba(22, 22, 35, 0.6);
    --color-bg-input: rgba(30, 30, 48, 0.5);

    --color-text-primary: #f0f0f5;
    --color-text-secondary: #a0a0b8;
    --color-text-muted: #6b6b80;

    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(255, 255, 255, 0.12);

    /* Accent Colors */
    --color-accent-primary: #6c63ff;
    --color-accent-primary-rgb: 108, 99, 255;
    --color-accent-primary-hover: #7b73ff;
    --color-accent-secondary: #00d4aa;
    --color-accent-secondary-rgb: 0, 212, 170;
    --color-accent-tertiary: #ff6b9d;
    --color-accent-gradient: linear-gradient(135deg, #6c63ff 0%, #00d4aa 50%, #ff6b9d 100%);
    --color-accent-gradient-soft: linear-gradient(135deg, rgba(108, 99, 255, 0.15) 0%, rgba(0, 212, 170, 0.15) 100%);

    /* Surfaces */
    --color-surface-glow: rgba(108, 99, 255, 0.08);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --fs-xs: 0.75rem;
    --fs-sm: 0.875rem;
    --fs-base: 1rem;
    --fs-md: 1.125rem;
    --fs-lg: 1.25rem;
    --fs-xl: 1.5rem;
    --fs-2xl: 2rem;
    --fs-3xl: 2.5rem;
    --fs-4xl: 3.5rem;
    --fs-5xl: 4.5rem;

    --fw-light: 300;
    --fw-regular: 400;
    --fw-medium: 500;
    --fw-semibold: 600;
    --fw-bold: 700;
    --fw-extrabold: 800;

    --lh-tight: 1.15;
    --lh-snug: 1.3;
    --lh-normal: 1.6;
    --lh-relaxed: 1.8;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 40px rgba(108, 99, 255, 0.15);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

    /* Layout */
    --container-max: 1200px;
    --navbar-height: 72px;
}

/* === Light Theme === */
[data-theme="light"] {
    --color-bg-primary: #f8f9fc;
    --color-bg-secondary: #ffffff;
    --color-bg-tertiary: #f0f1f5;
    --color-bg-card: rgba(255, 255, 255, 0.9);
    --color-bg-card-hover: rgba(255, 255, 255, 1);
    --color-bg-glass: rgba(255, 255, 255, 0.7);
    --color-bg-input: rgba(240, 241, 245, 0.8);

    --color-text-primary: #1a1a2e;
    --color-text-secondary: #4a4a6a;
    --color-text-muted: #8a8aaa;

    --color-border: rgba(0, 0, 0, 0.06);
    --color-border-hover: rgba(0, 0, 0, 0.12);

    --color-accent-primary: #5a52d5;
    --color-accent-primary-rgb: 90, 82, 213;
    --color-accent-primary-hover: #4840c0;

    --color-surface-glow: rgba(108, 99, 255, 0.05);

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 40px rgba(108, 99, 255, 0.08);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--navbar-height);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--fs-base);
    font-weight: var(--fw-regular);
    line-height: var(--lh-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    transition: background-color var(--transition-slow), color var(--transition-slow);
    overflow-x: hidden;
}

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

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

ul, ol {
    list-style: none;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
}

input, textarea {
    font-family: inherit;
    font-size: inherit;
}

strong {
    font-weight: var(--fw-semibold);
    color: var(--color-text-primary);
}

::selection {
    background: rgba(var(--color-accent-primary-rgb), 0.3);
    color: var(--color-text-primary);
}

/* === Layout === */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.section {
    padding: var(--space-5xl) 0;
    position: relative;
}

.section__header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section__label {
    display: inline-block;
    font-size: var(--fs-sm);
    font-weight: var(--fw-semibold);
    color: var(--color-accent-primary);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: var(--space-md);
    padding: var(--space-xs) var(--space-lg);
    background: rgba(var(--color-accent-primary-rgb), 0.1);
    border-radius: var(--radius-full);
    border: 1px solid rgba(var(--color-accent-primary-rgb), 0.2);
}

.section__title {
    font-size: var(--fs-3xl);
    font-weight: var(--fw-bold);
    line-height: var(--lh-tight);
    margin-bottom: var(--space-md);
    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;
}

.section__subtitle {
    font-size: var(--fs-md);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
    line-height: var(--lh-relaxed);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-weight: var(--fw-semibold);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    cursor: pointer;
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn:hover::before {
    opacity: 1;
}

.btn--primary {
    background: var(--color-accent-primary);
    color: #fff;
    border: 1px solid transparent;
    box-shadow: 0 4px 16px rgba(var(--color-accent-primary-rgb), 0.3);
}

.btn--primary:hover {
    background: var(--color-accent-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(var(--color-accent-primary-rgb), 0.4);
}

.btn--outline {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-hover);
}

.btn--outline:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
    transform: translateY(-2px);
}

.btn--sm {
    padding: 0.5rem 1rem;
    font-size: var(--fs-sm);
}

.btn--lg {
    padding: 0.875rem 1.75rem;
    font-size: var(--fs-base);
}

.btn--full {
    width: 100%;
}

/* === Tags === */
.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    color: var(--color-accent-primary);
    background: rgba(var(--color-accent-primary-rgb), 0.1);
    border: 1px solid rgba(var(--color-accent-primary-rgb), 0.15);
    border-radius: var(--radius-full);
    letter-spacing: 0.02em;
}

.tag--sm {
    padding: 0.2rem 0.6rem;
    font-size: 0.7rem;
}

/* ================================================================
   NAVBAR
   ================================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    z-index: 1000;
    transition: all var(--transition-base);
}

.navbar.scrolled {
    background: var(--color-bg-glass);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.navbar__container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.navbar__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
    color: var(--color-text-primary);
}

.navbar__logo-icon {
    font-size: 1.5rem;
}

.navbar__logo-text {
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar__links {
    display: flex;
    gap: var(--space-xl);
}

.navbar__link {
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-text-secondary);
    padding: var(--space-xs) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.navbar__link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-primary);
    border-radius: 1px;
    transition: width var(--transition-base);
}

.navbar__link:hover,
.navbar__link.active {
    color: var(--color-text-primary);
}

.navbar__link:hover::after,
.navbar__link.active::after {
    width: 100%;
}

.navbar__actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-secondary);
    background: var(--color-bg-glass);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.theme-toggle:hover {
    color: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    transform: rotate(20deg);
}

[data-theme="dark"] .theme-toggle__icon--moon { display: none; }
[data-theme="light"] .theme-toggle__icon--sun { display: none; }

.navbar__resume-btn {
    text-decoration: none;
}

/* Hamburger */
.navbar__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    padding: 4px 0;
}

.navbar__hamburger span {
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
}

.navbar__hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.navbar__hamburger.active span:nth-child(2) {
    opacity: 0;
}

.navbar__hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    background: var(--color-bg-secondary);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-xl);
    z-index: 999;
    transform: translateY(-110%);
    transition: transform var(--transition-base);
    display: none;
}

.mobile-menu.active {
    transform: translateY(0);
}

.mobile-menu__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.mobile-menu__link {
    font-size: var(--fs-lg);
    font-weight: var(--fw-medium);
    color: var(--color-text-secondary);
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
}

.mobile-menu__link:hover {
    color: var(--color-accent-primary);
}

/* ================================================================
   HERO SECTION
   ================================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: var(--navbar-height);
}

.hero__bg-effects {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
}

.hero__orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.4;
    animation: orbFloat 20s ease-in-out infinite;
}

.hero__orb--1 {
    width: 500px;
    height: 500px;
    background: var(--color-accent-primary);
    top: -10%;
    right: -5%;
    opacity: 0.12;
}

.hero__orb--2 {
    width: 400px;
    height: 400px;
    background: var(--color-accent-secondary);
    bottom: -10%;
    left: -5%;
    opacity: 0.1;
    animation-delay: -7s;
}

.hero__orb--3 {
    width: 300px;
    height: 300px;
    background: var(--color-accent-tertiary);
    top: 50%;
    left: 50%;
    opacity: 0.06;
    animation-delay: -14s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -40px) scale(1.05); }
    66% { transform: translate(-20px, 20px) scale(0.95); }
}

.hero__grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--color-border) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.3;
    mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black, transparent);
    -webkit-mask-image: radial-gradient(ellipse 60% 60% at 50% 50%, black, transparent);
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    padding-top: var(--space-2xl);
    padding-bottom: var(--space-2xl);
}

.hero__content {
    position: relative;
    z-index: 2;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: rgba(var(--color-accent-secondary-rgb), 0.1);
    border: 1px solid rgba(var(--color-accent-secondary-rgb), 0.2);
    border-radius: var(--radius-full);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-accent-secondary);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease-out;
}

.hero__badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent-secondary);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.5); }
}

.hero__title {
    font-size: var(--fs-4xl);
    font-weight: var(--fw-extrabold);
    line-height: var(--lh-tight);
    margin-bottom: var(--space-xl);
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.hero__title-accent {
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: var(--fs-md);
    color: var(--color-text-secondary);
    line-height: var(--lh-relaxed);
    max-width: 540px;
    margin-bottom: var(--space-2xl);
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero__cta-group {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-2xl);
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero__social {
    display: flex;
    gap: var(--space-md);
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.hero__social-link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

.hero__social-link:hover {
    color: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    transform: translateY(-3px);
    box-shadow: 0 4px 16px rgba(var(--color-accent-primary-rgb), 0.2);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Hero Visual */
.hero__visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero__image-wrapper {
    position: relative;
    width: 380px;
    height: 380px;
}

.hero__image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    position: relative;
    z-index: 2;
    border: 3px solid var(--color-border);
}

.hero__image-ring {
    position: absolute;
    inset: -12px;
    border-radius: 50%;
    border: 1px solid rgba(var(--color-accent-primary-rgb), 0.2);
    animation: ringPulse 4s ease-in-out infinite;
}

.hero__image-ring--2 {
    inset: -28px;
    border-color: rgba(var(--color-accent-secondary-rgb), 0.1);
    animation-delay: -2s;
}

@keyframes ringPulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.03); opacity: 1; }
}

.hero__floating-card {
    position: absolute;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-text-primary);
    box-shadow: var(--shadow-lg);
    z-index: 5;
    animation: floatCard 6s ease-in-out infinite;
}

.hero__floating-icon {
    font-size: 1.2rem;
}

.hero__floating-card--1 {
    top: 15%;
    right: -5%;
    animation-delay: 0s;
}

.hero__floating-card--2 {
    bottom: 20%;
    left: -8%;
    animation-delay: -2s;
}

.hero__floating-card--3 {
    bottom: 5%;
    right: 2%;
    animation-delay: -4s;
}

@keyframes floatCard {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* Scroll Indicator */
.hero__scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-muted);
    font-size: var(--fs-xs);
    font-weight: var(--fw-medium);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    animation: fadeInUp 0.6s ease-out 0.6s both;
}

.hero__scroll-indicator svg {
    animation: bounceDown 2s ease-in-out infinite;
}

@keyframes bounceDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

/* ================================================================
   ABOUT SECTION
   ================================================================ */
.about__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: start;
}

.about__text p {
    color: var(--color-text-secondary);
    line-height: var(--lh-relaxed);
    margin-bottom: var(--space-lg);
}

.about__highlights {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

.about__highlight-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.about__highlight-card:hover {
    border-color: rgba(var(--color-accent-primary-rgb), 0.3);
    background: var(--color-bg-card-hover);
    transform: translateX(4px);
}

.about__highlight-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.about__highlight-card strong {
    display: block;
    font-weight: var(--fw-semibold);
    margin-bottom: var(--space-xs);
    color: var(--color-text-primary);
}

.about__highlight-card span {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    line-height: var(--lh-normal);
}

/* Stats */
.about__stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
}

.about__stat-card {
    padding: var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.about__stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-accent-gradient);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.about__stat-card:hover {
    transform: translateY(-4px);
    border-color: rgba(var(--color-accent-primary-rgb), 0.3);
    box-shadow: var(--shadow-glow);
}

.about__stat-card:hover::before {
    opacity: 1;
}

.about__stat-number {
    font-size: var(--fs-3xl);
    font-weight: var(--fw-extrabold);
    color: var(--color-accent-primary);
    display: inline;
}

.about__stat-suffix {
    font-size: var(--fs-xl);
    font-weight: var(--fw-bold);
    color: var(--color-accent-primary);
}

.about__stat-label {
    display: block;
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-sm);
    font-weight: var(--fw-medium);
}

/* ================================================================
   EXPERIENCE / TIMELINE
   ================================================================ */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 28px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-accent-primary), var(--color-accent-secondary), transparent);
    border-radius: 1px;
}

.timeline__item {
    position: relative;
    padding-left: 72px;
    margin-bottom: var(--space-2xl);
}

.timeline__item:last-child {
    margin-bottom: 0;
}

.timeline__marker {
    position: absolute;
    left: 0;
    top: 0;
    width: 58px;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: var(--space-xl);
}

.timeline__dot {
    width: 16px;
    height: 16px;
    background: var(--color-accent-primary);
    border-radius: 50%;
    border: 3px solid var(--color-bg-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-accent-primary-rgb), 0.3);
    position: relative;
    z-index: 2;
    transition: all var(--transition-base);
}

.timeline__item:hover .timeline__dot {
    transform: scale(1.3);
    box-shadow: 0 0 0 6px rgba(var(--color-accent-primary-rgb), 0.2), var(--shadow-glow);
}

.timeline__card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.timeline__card:hover {
    border-color: rgba(var(--color-accent-primary-rgb), 0.3);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.timeline__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.timeline__role {
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.timeline__company {
    font-size: var(--fs-base);
    color: var(--color-accent-primary);
    font-weight: var(--fw-semibold);
}

.timeline__meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-xs);
}

.timeline__date {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
    font-weight: var(--fw-medium);
}

.timeline__location {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
}

.timeline__achievements {
    list-style: none;
    margin-bottom: var(--space-lg);
}

.timeline__achievements li {
    position: relative;
    padding-left: var(--space-xl);
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    line-height: var(--lh-relaxed);
    margin-bottom: var(--space-sm);
}

.timeline__achievements li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--color-accent-primary);
    font-weight: var(--fw-bold);
}

.timeline__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* ================================================================
   PROJECTS
   ================================================================ */
.projects__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.project-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    cursor: pointer;
}

.project-card:hover {
    border-color: rgba(var(--color-accent-primary-rgb), 0.3);
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.project-card__image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/10;
}

.project-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.project-card:hover .project-card__image img {
    transform: scale(1.05);
}

.project-card__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.project-card:hover .project-card__overlay {
    opacity: 1;
}

.project-card__content {
    padding: var(--space-xl);
}

.project-card__title {
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.project-card__summary {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    line-height: var(--lh-relaxed);
    margin-bottom: var(--space-md);
}

.project-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

/* ================================================================
   PROJECT MODAL
   ================================================================ */
.modal {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
}

.modal__content {
    position: relative;
    max-width: 800px;
    max-height: 85vh;
    width: 100%;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow-y: auto;
    transform: translateY(20px) scale(0.95);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-xl);
}

.modal.active .modal__content {
    transform: translateY(0) scale(1);
}

.modal__close {
    position: absolute;
    top: var(--space-lg);
    right: var(--space-lg);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    z-index: 10;
    transition: all var(--transition-fast);
}

.modal__close:hover {
    color: var(--color-accent-tertiary);
    border-color: var(--color-accent-tertiary);
}

.modal__body {
    padding: var(--space-3xl);
}

.modal__image {
    width: 100%;
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-xl);
    border: 1px solid var(--color-border);
}

.modal__title {
    font-size: var(--fs-2xl);
    font-weight: var(--fw-bold);
    margin-bottom: var(--space-md);
}

.modal__section {
    margin-bottom: var(--space-xl);
}

.modal__section-title {
    font-size: var(--fs-md);
    font-weight: var(--fw-semibold);
    color: var(--color-accent-primary);
    margin-bottom: var(--space-sm);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.modal__section p,
.modal__section li {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
    line-height: var(--lh-relaxed);
}

.modal__section ul {
    list-style: disc;
    padding-left: var(--space-xl);
}

.modal__section ul li {
    margin-bottom: var(--space-sm);
}

.modal__tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.modal__links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

/* ================================================================
   SKILLS SECTION
   ================================================================ */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.skills__category {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.skills__category:hover {
    border-color: rgba(var(--color-accent-primary-rgb), 0.3);
    box-shadow: var(--shadow-glow);
}

.skills__category-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.skills__category-icon {
    font-size: 1.5rem;
}

.skills__category-title {
    font-size: var(--fs-lg);
    font-weight: var(--fw-bold);
}

.skills__items {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.skill-item__name {
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-text-secondary);
}

.skill-item__bar {
    height: 6px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.skill-item__progress {
    height: 100%;
    width: 0;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-full);
    transition: width 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
}

.skill-item__progress::after {
    content: '';
    position: absolute;
    right: 0;
    top: -2px;
    width: 10px;
    height: 10px;
    background: var(--color-accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(var(--color-accent-primary-rgb), 0.4);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.skill-item__progress.animated::after {
    opacity: 1;
}

/* ================================================================
   CONTACT SECTION
   ================================================================ */
.contact {
    background: var(--color-bg-secondary);
}

.contact__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: start;
}

.contact__info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.contact__info-card {
    display: flex;
    align-items: flex-start;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.contact__info-card:hover {
    border-color: rgba(var(--color-accent-primary-rgb), 0.3);
    transform: translateX(4px);
}

.contact__info-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(var(--color-accent-primary-rgb), 0.1);
    border-radius: var(--radius-md);
    color: var(--color-accent-primary);
    flex-shrink: 0;
}

.contact__info-card h4 {
    font-size: var(--fs-base);
    font-weight: var(--fw-semibold);
    margin-bottom: var(--space-xs);
}

.contact__info-card a,
.contact__info-card span {
    font-size: var(--fs-sm);
    color: var(--color-text-secondary);
}

.contact__info-card a:hover {
    color: var(--color-accent-primary);
}

.contact__social-links {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.contact__social-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-text-secondary);
    transition: all var(--transition-base);
}

.contact__social-link:hover {
    color: var(--color-accent-primary);
    border-color: var(--color-accent-primary);
    transform: translateY(-2px);
}

/* Form */
.contact__form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-label {
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    color: var(--color-text-primary);
}

.form-input {
    padding: 0.875rem var(--space-lg);
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
    outline: none;
}

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

.form-input:focus {
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-accent-primary-rgb), 0.15);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.contact__form-status {
    font-size: var(--fs-sm);
    font-weight: var(--fw-medium);
    text-align: center;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    display: none;
}

.contact__form-status.success {
    display: block;
    color: var(--color-accent-secondary);
    background: rgba(var(--color-accent-secondary-rgb), 0.1);
    border: 1px solid rgba(var(--color-accent-secondary-rgb), 0.2);
}

.contact__form-status.error {
    display: block;
    color: var(--color-accent-tertiary);
    background: rgba(255, 107, 157, 0.1);
    border: 1px solid rgba(255, 107, 157, 0.2);
}

/* ================================================================
   FOOTER
   ================================================================ */
.footer {
    padding: var(--space-2xl) 0;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-primary);
}

.footer__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.footer__left {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.footer__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: var(--fw-semibold);
    color: var(--color-text-primary);
}

.footer__text {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
}

.footer__social {
    display: flex;
    gap: var(--space-md);
}

.footer__social a {
    color: var(--color-text-muted);
    transition: all var(--transition-fast);
}

.footer__social a:hover {
    color: var(--color-accent-primary);
    transform: translateY(-2px);
}

.footer__copyright {
    font-size: var(--fs-sm);
    color: var(--color-text-muted);
}

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

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

.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }

/* ================================================================
   RESPONSIVE DESIGN
   ================================================================ */
@media (max-width: 1024px) {
    :root {
        --fs-4xl: 2.75rem;
        --fs-3xl: 2rem;
    }

    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero__cta-group {
        justify-content: center;
    }

    .hero__social {
        justify-content: center;
    }

    .hero__visual {
        display: none;
    }

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

    .about__stats {
        grid-template-columns: repeat(4, 1fr);
    }

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

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

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

@media (max-width: 768px) {
    :root {
        --fs-4xl: 2.25rem;
        --fs-3xl: 1.75rem;
        --fs-2xl: 1.5rem;
        --space-5xl: 5rem;
        --space-4xl: 3.5rem;
    }

    .navbar__links {
        display: none;
    }

    .navbar__hamburger {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .navbar__resume-btn {
        display: none;
    }

    .about__stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .timeline::before {
        left: 18px;
    }

    .timeline__item {
        padding-left: 52px;
    }

    .timeline__marker {
        width: 38px;
    }

    .timeline__header {
        flex-direction: column;
    }

    .timeline__meta {
        align-items: flex-start;
    }

    .footer__container {
        flex-direction: column;
        text-align: center;
    }

    .footer__left {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    :root {
        --fs-4xl: 1.85rem;
        --fs-3xl: 1.5rem;
        --space-5xl: 4rem;
        --space-4xl: 2.5rem;
    }

    .container {
        padding: 0 var(--space-md);
    }

    .hero__cta-group {
        flex-direction: column;
        align-items: stretch;
    }

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

/* ================================================================
   CUSTOM SCROLLBAR
   ================================================================ */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* ================================================================
   FOCUS STYLES (Accessibility)
   ================================================================ */
:focus-visible {
    outline: 2px solid var(--color-accent-primary);
    outline-offset: 2px;
}

/* ================================================================
   PRINT STYLES
   ================================================================ */
@media print {
    .navbar,
    .hero__bg-effects,
    .hero__scroll-indicator,
    .theme-toggle,
    .modal {
        display: none !important;
    }

    body {
        background: white;
        color: black;
    }
}