/* ========================================
   CSS CUSTOM PROPERTIES & THEME VARIABLES
   ======================================== */

:root {
    /* Dark Theme Colors - Richer & Deeper */
    --dark-bg-primary: #020617;
    --dark-bg-secondary: #0f172a;
    --dark-bg-tertiary: #1e293b;
    --dark-text-primary: #f8fafc;
    --dark-text-secondary: #cbd5e1;
    --dark-text-muted: #94a3b8;

    /* Light Theme Colors - Clean & Crisp */
    --light-bg-primary: #ffffff;
    --light-bg-secondary: #f8fafc;
    --light-bg-tertiary: #f1f5f9;
    --light-text-primary: #0f172a;
    --light-text-secondary: #334155;
    --light-text-muted: #64748b;

    /* Accent Colors - Vibrant & Modern */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
    --accent-gradient-alt: linear-gradient(135deg, #3b82f6 0%, #14b8a6 100%);
    --accent-glow: 0 0 20px rgba(99, 102, 241, 0.5);

    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

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

    /* Typography */
    --font-primary: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Outfit', 'Inter', sans-serif;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 15px rgba(99, 102, 241, 0.3);

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   DARK THEME
   ======================================== */

.dark-theme {
    --bg-primary: var(--dark-bg-primary);
    --bg-secondary: var(--dark-bg-secondary);
    --bg-tertiary: var(--dark-bg-tertiary);
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --text-muted: var(--dark-text-muted);
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.08);
    --header-bg: rgba(2, 6, 23, 0.85);
}

/* ========================================
   LIGHT THEME
   ======================================== */

.light-theme {
    --bg-primary: var(--light-bg-primary);
    --bg-secondary: var(--light-bg-secondary);
    --bg-tertiary: var(--light-bg-tertiary);
    --text-primary: var(--light-text-primary);
    --text-secondary: var(--light-text-secondary);
    --text-muted: var(--light-text-muted);
    --card-bg: rgba(255, 255, 255, 0.8);
    --card-border: rgba(0, 0, 0, 0.06);
    --header-bg: rgba(255, 255, 255, 0.85);
}

/* ========================================
   GLOBAL STYLES
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.page {
    min-height: 100vh;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
}

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

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

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

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

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

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-base);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
}

.logo {
    font-size: 1.75rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

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

.main-nav a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.main-nav a:hover {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.main-nav a.active {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
}

.main-nav a.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--accent-gradient);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.theme-toggle {
    background: var(--accent-primary);
    border: none;
    color: white;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.theme-toggle:hover {
    background: var(--accent-secondary);
    transform: scale(1.08);
    box-shadow: var(--shadow-glow);
}

.mobile-menu-toggle {
    display: none;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.mobile-nav {
    display: none;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) 0;
    border-top: 1px solid var(--card-border);
}

.mobile-nav a {
    color: var(--text-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav a:hover,
.mobile-nav a.active {
    color: var(--accent-primary);
    background: var(--card-bg);
}

/* ========================================
   MAIN CONTENT
   ======================================== */

.main-content {
    flex: 1;
}

/* ========================================
   PAGE HEADER
   ======================================== */

.page-header {
    text-align: center;
    padding: calc(var(--spacing-2xl) + 80px) 0 var(--spacing-xl);
    background: var(--bg-secondary);
}

.page-title {
    margin-bottom: var(--spacing-sm);
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.page-subtitle {
    color: var(--text-muted);
    font-size: 1.125rem;
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero-section {
    min-height: 100vh;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--bg-primary);
    overflow: hidden;
    padding-top: 80px;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--accent-gradient);
    opacity: 0.05;
    z-index: 0;
}

.hero-content {
    position: relative;
    width: 100%;
    z-index: 1;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-2xl);
    padding: var(--spacing-2xl) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.hero-text {
    flex: 1;
    min-width: 300px;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    color: var(--accent-primary);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.hero-title {
    margin-bottom: var(--spacing-xs);
}

.hero-role {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.hero-description {
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

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

.hero-image {
    flex: 1;
    min-width: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeInRight 1s ease-out;
}

.image-wrapper {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-glow {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--accent-gradient);
    border-radius: 50%;
    filter: blur(40px);
    opacity: 0.3;
    animation: pulse 3s ease-in-out infinite;
}

.profile-icon {
    font-size: 250px;
    color: var(--accent-primary);
    position: relative;
    z-index: 1;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-indicator i {
    font-size: 2rem;
    color: var(--accent-primary);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
    font-size: 1rem;
    text-decoration: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

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

.btn-secondary {
    background: transparent;
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.btn-secondary:hover {
    background: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.btn-sm {
    padding: 0.625rem 1.25rem;
    font-size: 0.875rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* ========================================
   CARDS
   ======================================== */

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

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   SECTIONS
   ======================================== */

section {
    padding: var(--spacing-2xl) 0;
}

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

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-gradient);
    margin: var(--spacing-sm) auto 0;
    border-radius: var(--radius-sm);
}

/* ========================================
   FOOTER
   ======================================== */

.main-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--card-border);
    padding: var(--spacing-lg) 0;
    margin-top: auto;
}

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

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

.footer-links a {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

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

/* ========================================
   ANIMATIONS
   ======================================== */

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

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

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }

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

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateX(-50%) translateY(0);
    }

    40% {
        transform: translateX(-50%) translateY(-10px);
    }

    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
        opacity: 0.3;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.5;
    }
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

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

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

    .mobile-nav {
        display: flex;
    }

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

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

    .social-links {
        justify-content: center;
    }

    .image-wrapper {
        width: 200px;
        height: 200px;
    }

    .profile-icon {
        font-size: 150px;
    }
}