/* ==========================================================================
   SkillzDepot Inc. - Premium Design System
   ========================================================================== */

/* --- CSS Variables & Design Tokens --- */
:root {
    /* Colors - Dark Theme (High Contrast, Vibrant Accents) */
    --bg-base: #0a0a0c;
    --bg-surface: #13141a;
    --bg-glass: rgba(255, 255, 255, 0.03);
    --bg-glass-hover: rgba(255, 255, 255, 0.06);
    
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;
    
    --accent-primary: #6366f1; /* Indigo */
    --accent-primary-hover: #4f46e5;
    --accent-secondary: #8b5cf6; /* Violet */
    --accent-tertiary: #ec4899; /* Pink */
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-light: rgba(255, 255, 255, 0.15);
    
    /* Typography */
    --font-main: 'Inter', sans-serif;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 1rem;
    --spacing-4: 1.5rem;
    --spacing-5: 2rem;
    --spacing-6: 3rem;
    --spacing-8: 4rem;
    --spacing-12: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-pill: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

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

ul, ol {
    list-style: none;
}

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

/* --- Typography Utilities --- */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-3);
}

p {
    margin-bottom: var(--spacing-4);
    color: var(--text-secondary);
}

.gradient-text {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-tertiary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

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

/* --- Layout Utilities --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-4);
}

.section-padding {
    padding: var(--spacing-12) 0;
}

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

.grid {
    display: grid;
    gap: var(--spacing-6);
}

.alt-bg {
    background-color: var(--bg-surface);
}

/* --- Components --- */

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-pill);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 14px 0 rgba(99, 102, 241, 0.39);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
    background: linear-gradient(135deg, var(--accent-primary-hover), var(--accent-secondary));
}

.btn-outline {
    background: transparent;
    border-color: var(--border-light);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--accent-primary);
    background: var(--bg-glass);
    color: var(--text-primary);
}

.btn-link {
    display: inline-flex;
    align-items: center;
    color: var(--accent-primary);
    font-weight: 500;
    margin-top: var(--spacing-2);
}

.btn-link:hover {
    color: var(--accent-primary-hover);
    text-decoration: underline;
}

/* Glass Panel (Glassmorphism effect) */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Forms */
.input-field {
    width: 100%;
    padding: 1rem 1.5rem;
    border-radius: var(--radius-pill);
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: white;
    font-family: var(--font-main);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-fast);
}

.input-field:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
}

/* Badge */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: rgba(99, 102, 241, 0.1);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-pill);
    color: var(--accent-secondary);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-4);
}

/* --- Section Specific Styles --- */

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: var(--spacing-4) 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(10, 10, 12, 0.85);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-2) 0;
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -1px;
}

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

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

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
}

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0%;
    height: 2px;
    background: var(--accent-primary);
    transition: width var(--transition-normal);
}

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

.mobile-menu-btn {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 1001; /* Above the mobile menu overlay */
}

.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    margin: 5px 0;
    transition: all var(--transition-normal);
}

/* Hero Section */
.hero {
    position: relative;
    padding-top: 150px;
    padding-bottom: var(--spacing-12);
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg-shapes {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.shape {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.5;
}

.shape-1 {
    top: -10%;
    right: -5%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--accent-secondary) 0%, transparent 70%);
}

.shape-2 {
    bottom: -20%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-8);
    align-items: center;
}

.hero-title {
    font-size: clamp(3rem, 5vw, 4.5rem);
    margin-bottom: var(--spacing-4);
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 300;
    margin-bottom: var(--spacing-6);
    line-height: 1.8;
}

.hero-cta-group {
    display: flex;
    gap: var(--spacing-4);
}

/* Hero Visual / Mockup */
.hero-visual {
    position: relative;
}

.main-panel {
    width: 100%;
    height: 400px;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 2;
}

.panel-header {
    height: 40px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-3);
}

.panel-header .dots {
    display: flex;
    gap: 6px;
}

.panel-header .dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--border-light);
}

.panel-header .dots span:nth-child(1) { background-color: #ff5f56; }
.panel-header .dots span:nth-child(2) { background-color: #ffbd2e; }
.panel-header .dots span:nth-child(3) { background-color: #27c93f; }

.panel-body {
    flex: 1;
    padding: var(--spacing-4);
}

.abstract-chart {
    display: flex;
    align-items: flex-end;
    gap: 12px;
    height: 120px;
    width: 80%;
}

.bar {
    flex: 1;
    background: linear-gradient(to top, var(--accent-primary), transparent);
    border-radius: 4px 4px 0 0;
    animation: growBar 2s ease-out forwards;
    transform-origin: bottom;
}

.bar-1 { height: 40%; animation-delay: 0.1s; }
.bar-2 { height: 70%; animation-delay: 0.2s; }
.bar-3 { height: 50%; animation-delay: 0.3s; }
.bar-4 { height: 90%; animation-delay: 0.4s; }
.bar-5 { height: 60%; animation-delay: 0.5s; background: linear-gradient(to top, var(--accent-tertiary), transparent); }

@keyframes growBar {
    from { transform: scaleY(0); }
    to { transform: scaleY(1); }
}

.floating-card {
    position: absolute;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: var(--spacing-3);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    z-index: 3;
    animation: float 6s ease-in-out infinite;
}

.floating-card h4 {
    margin-bottom: 0;
    font-size: 0.875rem;
}

.floating-card p {
    margin-bottom: 0;
    font-size: 0.75rem;
}

.card-1 {
    top: 50px;
    right: -30px;
    animation-delay: 0s;
}

.card-2 {
    bottom: 50px;
    left: -40px;
    animation-delay: 3s;
}

@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
    100% { transform: translateY(0px); }
}

/* Section Headers */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--spacing-12);
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
}

/* Services Section */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-6);
}

.service-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: var(--spacing-6) var(--spacing-5);
    border-radius: var(--radius-xl);
    transition: all var(--transition-normal);
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--border-light);
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
    background: var(--bg-glass-hover);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-4);
    color: white;
}

.gradient-1 { background: linear-gradient(135deg, #3b82f6, #6366f1); }
.gradient-2 { background: linear-gradient(135deg, #8b5cf6, #d946ef); }
.gradient-3 { background: linear-gradient(135deg, #10b981, #0ea5e9); }

/* About Section */
.about-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-8);
    align-items: center;
}

.glass-image-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: visible;
}

.placeholder-img {
    width: 100%;
    aspect-ratio: 4/3;
    background: linear-gradient(45deg, var(--bg-base), var(--bg-surface));
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
}

.experience-badge {
    position: absolute;
    bottom: -30px;
    right: -30px;
    padding: var(--spacing-4);
    display: flex;
    flex-direction: column;
    align-items: center;
    z-index: 2;
}

.experience-badge .number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-primary);
    line-height: 1;
}

.experience-badge .text {
    font-size: 0.875rem;
    text-align: center;
    font-weight: 500;
}

.feature-list {
    margin-top: var(--spacing-6);
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-3);
    font-size: 1.1rem;
}

.feature-list li svg {
    width: 20px;
    height: 20px;
    color: var(--accent-tertiary);
    flex-shrink: 0;
}

/* CTA Section */
.cta-box {
    padding: var(--spacing-8);
    text-align: center;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.cta-content {
    max-width: 600px;
    margin: 0 auto var(--spacing-6);
}

.cta-content h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.cta-action {
    max-width: 500px;
    margin: 0 auto;
}

.subscribe-form {
    display: flex;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-2);
}

.subscribe-form .input-field {
    flex: 1;
}

.form-note {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Footer Section */
.footer {
    border-top: 1px solid var(--border-light);
    padding: var(--spacing-12) 0 var(--spacing-4);
    background-color: var(--bg-base);
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-8);
    margin-bottom: var(--spacing-8);
}

.footer-brand .logo {
    display: inline-block;
    margin-bottom: var(--spacing-4);
}

.footer-brand p {
    max-width: 300px;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-4);
}

.link-column h4 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-4);
    color: var(--text-primary);
}

.link-column ul li {
    margin-bottom: var(--spacing-2);
}

.link-column ul li a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.link-column ul li a:hover {
    color: var(--accent-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-6);
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* --- Animations & Utilities --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

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

.reveal-delay { transition-delay: 0.2s; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }

/* --- Responsive Design --- */
@media (max-width: 992px) {
    .hero-container, .about-container, .footer-container {
        grid-template-columns: 1fr;
    }
    
    .hero {
        padding-top: 120px;
        text-align: center;
    }

    .hero-cta-group {
        justify-content: center;
    }

    .hero-visual {
        margin-top: var(--spacing-6);
    }
    
    .main-panel {
        max-width: 600px;
        margin: 0 auto;
    }
    
    .about-visual {
        order: -1;
    }
    
    .experience-badge {
        right: 0;
        bottom: -20px;
    }
}

@media (max-width: 768px) {
    :root {
        --spacing-12: 4rem;
    }

    /* Mobile Menu Toggle */
    .mobile-menu-btn {
        display: block;
    }

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

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

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

    .nav-links {
        position: fixed;
        left: -100%;
        top: 0;
        flex-direction: column;
        background-color: var(--bg-surface);
        width: 100%;
        height: 100vh;
        justify-content: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.5);
    }

    .nav-links.active {
        left: 0;
    }
    
    .subscribe-form {
        flex-direction: column;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-cta-group {
        flex-direction: column;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .floating-card {
        display: none; /* Hide complex flying elements on tiny screens */
    }
}