/* ===== CSS Variables ===== */
:root {
    --primary: #ff6b4a;
    --primary-light: #ff8a70;
    --primary-dark: #e55a3a;
    --secondary: #1a1a2e;
    --background: #fafafa;
    --surface: #ffffff;
    --surface-hover: #f5f5f5;
    --text-primary: #1a1a2e;
    --text-secondary: #666;
    --text-muted: #999;
    --border: #e5e5e5;
    --border-light: #f0f0f0;
    --success: #10b981;
    --warning: #f59e0b;
    --shadow-sm: 0 1px 2px 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: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--primary-dark);
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    z-index: 1000;
    padding: 16px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

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

.nav-links {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

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

.nav-badge {
    background: var(--primary);
    color: white !important;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-size: 0.85rem;
}

.nav-badge:hover {
    background: var(--primary-dark);
    color: white !important;
}

/* ===== Hero Section ===== */
.hero {
    padding: 160px 0 100px;
    text-align: center;
    background: linear-gradient(180deg, #fff 0%, var(--background) 100%);
}

.hero-badge {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 8px 20px;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, #ffa07a 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 48px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 64px;
    flex-wrap: wrap;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--primary);
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ===== Section Headers ===== */
.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ===== Projects Section ===== */
.projects {
    padding: 80px 0;
}

.project-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 20px;
    border: 1px solid var(--border);
    background: var(--surface);
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    position: relative;
    transition: all 0.3s;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.project-placeholder {
    opacity: 0.7;
}

.project-status {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.status-active {
    background: #dcfce7;
    color: #166534;
}

.status-coming {
    background: #fef3c7;
    color: #92400e;
}

.status-completed {
    background: #dbeafe;
    color: #1e40af;
}

.project-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.project-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.tag {
    background: var(--border-light);
    color: var(--text-secondary);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
}

.project-links {
    display: flex;
    gap: 12px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 0.9rem;
    font-weight: 500;
}

.project-link.disabled {
    color: var(--text-muted);
    cursor: default;
}

/* ===== Built With Section ===== */
.built-with {
    padding: 80px 0;
    background: var(--surface);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
}

.tool-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 32px;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all 0.3s;
    cursor: pointer;
}

.tool-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

.tool-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.tool-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* ===== About Section ===== */
.about {
    padding: 80px 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 24px;
    text-align: center;
}

.about-text p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    text-align: center;
}

.about-terminal {
    background: var(--secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-top: 40px;
}

.terminal-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: #252540;
}

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

.terminal-dot.red { background: #ff5f57; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #28c840; }

.terminal-title {
    margin-left: auto;
    color: #666;
    font-size: 0.85rem;
}

.terminal-body {
    padding: 20px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.8;
}

.terminal-body code {
    color: #e0e0e0;
}

.terminal-prompt {
    color: var(--primary);
    font-weight: bold;
}

.terminal-output {
    color: #888;
}

/* ===== Footer ===== */
.footer {
    padding: 48px 0;
    background: var(--secondary);
    color: white;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.25rem;
    font-weight: 700;
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    color: #999;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: white;
}

.footer-copy {
    color: #666;
    font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 16px;
    }

    .nav-links {
        gap: 20px;
    }

    .hero {
        padding: 140px 0 60px;
    }

    .hero-stats {
        gap: 32px;
    }

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

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.project-card {
    animation: fadeIn 0.5s ease forwards;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }
.project-card:nth-child(4) { animation-delay: 0.4s; }