/* =====================
   GLOBAL STYLES
===================== */
:root {
    /* Colors - Light Theme */
    --color-background: #f5f5f7;
    --color-background-secondary: #ffffff;
    --color-text-primary: #1d1d1f;
    --color-text-secondary: #6e6e73;
    --color-accent: #0071e3;
    --color-accent-hover: #0077ed;
    --color-border: rgba(0, 0, 0, 0.1);
    --color-card-shadow: rgba(0, 0, 0, 0.05);
    --color-card-hover: rgba(0, 0, 0, 0.03);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 5rem;

    /* Border radius */
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark Theme Colors */
[data-theme="dark"] {
    --color-background: #000000;
    --color-background-secondary: #1c1c1e;
    --color-text-primary: #f5f5f7;
    --color-text-secondary: #a1a1a6;
    --color-accent: #2997ff;
    --color-accent-hover: #0071e3;
    --color-border: rgba(255, 255, 255, 0.15);
    --color-card-shadow: rgba(0, 0, 0, 0.3);
    --color-card-hover: rgba(255, 255, 255, 0.05);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--color-text-primary);
    background-color: var(--color-background);
    overflow-x: hidden;
    transition: background-color var(--transition-medium), color var(--transition-medium);
}

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2.25rem;
    font-weight: 600;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-secondary);
}

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

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

ul {
    list-style: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 1.75rem;
    border-radius: 30px;
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background-color: var(--color-accent-hover);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

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

.btn-secondary:hover {
    background-color: var(--color-card-hover);
    color: var(--color-text-primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.btn-white {
    background-color: white;
    color: var(--color-accent);
}

.btn-white:hover {
    background-color: var(--color-background-secondary);
    color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    padding: 0.75rem 1.5rem;
}

.btn-outline:hover {
    background-color: var(--color-card-hover);
    color: var(--color-text-primary);
    transform: translateY(-2px);
}

/* =====================
   HEADER STYLES
===================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    background-color: rgba(255, 255, 255, 0.8);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: 0 1px 0 rgba(0, 0, 0, 0.05);
    transition: all var(--transition-medium);
}

[data-theme="dark"] .header {
    background-color: rgba(0, 0, 0, 0.8);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

.header.scrolled {
    padding: 0.75rem 0;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
}

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

.main-nav ul {
    display: flex;
    gap: var(--spacing-md);
}

.main-nav a {
    color: var(--color-text-primary);
    font-weight: 500;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width var(--transition-medium);
}

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

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background-color: transparent;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

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

.theme-toggle .fa-sun {
    display: none;
}

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

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-background);
    z-index: 999;
    padding-top: 80px;
    transform: translateX(100%);
    transition: transform var(--transition-medium);
    display: none;
}

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

.mobile-menu-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
}

.mobile-menu ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    text-align: center;
}

.mobile-menu a {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--color-text-primary);
}

/* =====================
   HERO SECTION
===================== */
.hero {
    padding: calc(var(--spacing-xxl) * 2) 0 var(--spacing-xxl);
    position: relative;
}

.hero-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.hero-text h1 span {
    display: inline-block;
    color: var(--color-accent);
    position: relative;
}

.hero-text h1 span::after {
    content: '';
    position: absolute;
    bottom: 0.2rem;
    left: 0;
    width: 100%;
    height: 0.5rem;
    background-color: rgba(0, 113, 227, 0.2);
    z-index: -1;
}

.hero-text p {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    max-width: 90%;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
}

.hero-animation {
    flex: 1;
    max-width: 500px;
}

lottie-player {
    width: 100%;
    height: 100%;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.scroll-indicator:hover {
    opacity: 1;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--color-text-primary);
    border-radius: 20px;
    position: relative;
    margin-bottom: var(--spacing-xs);
}

.mouse::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background-color: var(--color-text-primary);
    border-radius: 2px;
    animation: scrollMouse 2s infinite;
}

@keyframes scrollMouse {
    0%, 100% { opacity: 0; transform: translate(-50%, 0); }
    50% { opacity: 1; transform: translate(-50%, 8px); }
}

.scroll-indicator p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* Cursor Follower */
.cursor-follower {
    position: fixed;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(0, 113, 227, 0.3);
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 9999;
    transition: width 0.3s, height 0.3s, background-color 0.3s;
    opacity: 0;
}

.cursor-follower.active {
    opacity: 1;
}

.cursor-follower.hover {
    width: 60px;
    height: 60px;
    background-color: rgba(0, 113, 227, 0.2);
}

/* =====================
   SECTION COMMON STYLES
===================== */
section {
    padding: var(--spacing-xxl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-xs);
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background-color: var(--color-accent);
}

.section-header p {
    font-size: 1.2rem;
    max-width: 600px;
    margin: var(--spacing-md) auto 0;
}

/* =====================
   BENTO GRID STYLES
===================== */
.bento-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.bento-item {
    background-color: var(--color-background-secondary);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: 0 5px 15px var(--color-card-shadow);
    position: relative;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
}

.bento-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px var(--color-card-shadow);
}

.bento-large {
    grid-column: span 2;
    grid-row: span 2;
}

.bento-content {
    padding: var(--spacing-md);
    height: 100%;
    z-index: 2;
    position: relative;
}

.bento-hover-effect {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at var(--mouse-x, center) var(--mouse-y, center), rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 50%);
    opacity: 0;
    transition: opacity var(--transition-fast);
    pointer-events: none;
    z-index: 1;
}

[data-theme="dark"] .bento-hover-effect {
    background: radial-gradient(circle at var(--mouse-x, center) var(--mouse-y, center), rgba(255,255,255,0.05) 0%, rgba(255,255,255,0) 50%);
}

.bento-item:hover .bento-hover-effect {
    opacity: 1;
}

.tag {
    display: inline-block;
    padding: 0.35rem 0.75rem;
    background-color: rgba(0, 113, 227, 0.1);
    color: var(--color-accent);
    border-radius: 30px;
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.bento-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: var(--spacing-sm);
    color: var(--color-accent);
    font-weight: 500;
    transition: gap var(--transition-fast);
}

.bento-link:hover {
    gap: 0.75rem;
}

.bento-link i {
    font-size: 0.875rem;
}

.bento-large .bento-content {
    display: flex;
    flex-direction: column;
}

.bento-text {
    flex-grow: 1;
    margin-bottom: var(--spacing-md);
}

.bento-image {
    height: 220px;
    overflow: hidden;
    border-radius: var(--border-radius-sm);
}

.preview-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.bento-item:hover .preview-image {
    transform: scale(1.05);
}

.bento-icon {
    position: absolute;
    bottom: var(--spacing-md);
    right: var(--spacing-md);
    font-size: 2.5rem;
    color: rgba(0, 113, 227, 0.2);
}

/* Skills Grid */
.bento-skills .bento-content {
    padding: var(--spacing-md);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
}

.skill-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm);
    background-color: var(--color-card-hover);
    border-radius: var(--border-radius-sm);
    transition: transform var(--transition-fast);
}

.skill-item:hover {
    transform: translateY(-3px);
}

.skill-item i {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-accent);
}

.skill-item span {
    font-weight: 500;
    font-size: 0.875rem;
}

/* Animation Bento */
.bento-animation {
    overflow: hidden;
    padding: 0;
}

.bento-animation .bento-content {
    padding: 0;
    height: 100%;
}

/* Week Items */
.week-item {
    position: relative;
    overflow: hidden;
}

.week-number {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    padding: 0.35rem 0.75rem;
    border-radius: 30px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.week-1 .week-number { background-color: #34c759; }
.week-2 .week-number { background-color: #ff9500; }
.week-3 .week-number { background-color: #ff2d55; }
.week-4 .week-number { background-color: #5e5ce6; }

.week-links {
    margin: var(--spacing-sm) 0;
}

.week-links li {
    margin-bottom: 0.5rem;
}

.week-links a {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast), transform var(--transition-fast);
    display: inline-block;
}

.week-links a:hover {
    color: var(--color-accent);
    transform: translateX(3px);
}

.progress-indicator {
    margin-top: var(--spacing-sm);
    width: 100%;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: 10px;
    height: 6px;
    overflow: hidden;
}

[data-theme="dark"] .progress-indicator {
    background-color: rgba(255, 255, 255, 0.1);
}

.progress-bar {
    height: 100%;
    border-radius: 10px;
    background-color: var(--color-accent);
}

.progress-indicator span {
    display: block;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    margin-top: 0.25rem;
}

/* =====================
   ABOUT SECTION
===================== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    border-radius: var(--border-radius-md);
    box-shadow: 0 10px 30px var(--color-card-shadow);
}

.about-badges {
    display: flex;
    gap: var(--spacing-sm);
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
}

.badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--color-accent);
    color: white;
    border-radius: 30px;
    font-size: 0.875rem;
    font-weight: 500;
    box-shadow: 0 5px 15px var(--color-card-shadow);
}

.badge:nth-child(2) {
    background-color: #34c759;
}

.about-text h2 {
    margin-bottom: var(--spacing-md);
}

.about-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* =====================
   FOOTER STYLES
===================== */
.footer {
    background-color: var(--color-background-secondary);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.footer-logo h3 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
}

.footer-logo span {
    color: var(--color-accent);
}

.footer-logo p {
    font-size: 0.95rem;
}

.footer-links {
    display: flex;
    gap: var(--spacing-xl);
}

.footer-column h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-primary);
}

.footer-column ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-column ul a {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.875rem;
    margin-bottom: 0;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: var(--color-card-hover);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background-color: var(--color-accent);
    color: white;
    transform: translateY(-3px);
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: var(--color-accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: none;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-medium);
    z-index: 800;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--color-accent-hover);
    transform: translateY(-5px);
}

/* =====================
   RESPONSIVE STYLES
===================== */
@media (max-width: 1024px) {
    html {
        font-size: 15px;
    }

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

    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .about-image {
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

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

    .hero-text p {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

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

    .bento-large {
        grid-column: span 1;
        grid-row: span 1;
    }

    .footer-content,
    .footer-links {
        flex-direction: column;
        gap: var(--spacing-lg);
    }

    .footer-bottom {
        flex-direction: column;
        gap: var(--spacing-md);
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2.5rem;
    }

    .section-header h2 {
        font-size: 2rem;
    }

    .hero {
        padding: calc(var(--spacing-xxl) * 1.5) 0 var(--spacing-xl);
    }

    .hero-text h1 {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .about-badges {
        position: static;
        transform: none;
        margin-top: var(--spacing-sm);
        justify-content: center;
    }

    .about-buttons {
        flex-direction: column;
    }
}