/* ========================================
   JustCodeIt - Modern CSS Styles
   ======================================== */

/* CSS Variables */
:root {
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #10b981;
    --color-accent: #f59e0b;
    
    --color-bg: #0f172a;
    --color-bg-secondary: #1e293b;
    --color-bg-card: #334155;
    --color-text: #f8fafc;
    --color-text-muted: #94a3b8;
    --color-text-dark: #1e293b;
    --color-border: #475569;
    --color-error: #ef4444;
    --color-success: #22c55e;
    
    --font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.5);
    
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ========================================
   Header & Navigation
   ======================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 1.2rem;
}

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

.nav-list {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--color-text-muted);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

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

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

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--color-text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    border: none;
    transition: var(--transition);
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-border);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    background: rgba(99, 102, 241, 0.1);
}

.btn-full {
    width: 100%;
}

.btn-large {
    padding: 16px 40px;
    font-size: 1.1rem;
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    padding: 140px 0 80px;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--color-primary-light), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: 30px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.code-block {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border);
}

.code-header {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
}

.code-header .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f56; }
.dot.yellow { background: #ffbd2e; }
.dot.green { background: #27ca40; }

.code-block pre {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    overflow-x: auto;
}

.code-block code {
    display: block;
}

.keyword { color: #c678dd; }
.function { color: #61afef; }
.string { color: #98c379; }
.arrow { color: #56b6c2; }
.method { color: #e5c07b; }

/* ========================================
   Sections
   ======================================== */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 15px;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-bottom: 50px;
}

/* ========================================
   Technologies Section
   ======================================== */
.technologies {
    padding: 80px 0;
    background: var(--color-bg-secondary);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.tech-card {
    background: var(--color-bg);
    padding: 30px;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.tech-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.tech-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.tech-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ========================================
   Features Section
   ======================================== */
.features {
    padding: 80px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--color-bg-secondary);
    padding: 35px 25px;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.feature-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

/* ========================================
   CTA Section
   ======================================== */
.cta {
    padding: 100px 0;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    text-align: center;
}

.cta h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
}

.cta p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 30px;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    background: var(--color-bg-secondary);
    padding: 60px 0 30px;
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand p {
    color: var(--color-text-muted);
    margin-top: 15px;
    font-size: 0.95rem;
}

.footer-links h4,
.footer-social h4 {
    font-size: 1rem;
    margin-bottom: 20px;
    color: var(--color-text);
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.footer-links a:hover {
    color: var(--color-primary-light);
}

.social-links {
    display: flex;
    gap: 10px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    border-radius: var(--radius-md);
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
}

.social-link:hover {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ========================================
   Login Page
   ======================================== */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-card {
    background: var(--color-bg-secondary);
    padding: 40px;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-xl);
}

.login-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 30px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 1.5rem;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.login-form {
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.form-error {
    color: var(--color-error);
    font-size: 0.9rem;
    margin-bottom: 15px;
    min-height: 20px;
    text-align: center;
}

.login-divider {
    display: flex;
    align-items: center;
    margin: 25px 0;
}

.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

.login-divider span {
    padding: 0 15px;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.login-footer {
    text-align: center;
    margin-top: 25px;
}

.back-link {
    color: var(--color-text-muted);
    font-size: 0.95rem;
}

.back-link:hover {
    color: var(--color-primary-light);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 992px) {
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.8rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        order: -1;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero {
        padding: 100px 0 50px;
    }
    
    .hero-title {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .tech-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-brand {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
    
    .login-card {
        padding: 30px 20px;
    }
}