/* ===============================================
   CODECRAFTER - Advanced QR Code Generator
   Dark Theme with Modern Design
   =============================================== */

:root {
    /* Dark Theme Colors - Professional Dark */
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1729;
    --bg-card: #141b2d;
    --bg-card-hover: #1a2235;
    
    /* Accent Colors - Amber/Gold */
    --primary: #f59e0b;
    --primary-dark: #d97706;
    --accent: #fbbf24;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    /* Accent Colors - Solid */
    --primary-solid: #f59e0b;
    
    /* Text Colors */
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    /* Gradients - Amber */
    --gradient-primary: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-accent: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 25px rgba(245, 158, 11, 0.2);
    
    /* Border */
    --border: 1px solid #1e293b;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    min-height: 100vh;
}

/* ===============================================
   ANIMATED BACKGROUND
   =============================================== */
.background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.stars {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(255, 255, 255, 0.8), transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(245, 158, 11, 0.2), transparent),
        radial-gradient(1px 1px at 50% 50%, rgba(255, 255, 255, 0.6), transparent),
        radial-gradient(1px 1px at 80% 10%, rgba(251, 191, 36, 0.15), transparent);
    background-repeat: repeat;
    background-size: 200px 200px;
    animation: starsMove 120s linear infinite;
    opacity: 0.5;
}

@keyframes starsMove {
    from { transform: translateY(0); }
    to { transform: translateY(-200px); }
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    animation: particlesFloat 30s ease-in-out infinite alternate;
}

@keyframes particlesFloat {
    from { transform: translateX(-20px) translateY(-10px); }
    to { transform: translateX(20px) translateY(10px); }
}

/* ===============================================
   NAVIGATION
   =============================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(10, 14, 26, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: var(--border);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.back-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    font-weight: 500;
}

.back-link:hover {
    color: var(--primary);
    background: rgba(59, 130, 246, 0.1);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Space Grotesk', sans-serif;
    color: var(--text-primary);
}

.logo i {
    font-size: 1.75rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.theme-toggle {
    background: rgba(255, 255, 255, 0.05);
    border: var(--border);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: rgba(59, 130, 246, 0.15);
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--primary);
}

/* ===============================================
   CONTAINER
   =============================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 100px 2rem 3rem;
}

/* ===============================================
   GENERATOR HERO
   =============================================== */
.generator-hero {
    margin-bottom: 3rem;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 2rem;
}

/* Input Panel */
.input-panel,
.preview-panel {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: var(--border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    position: relative;
    overflow: hidden;
}

.input-panel::before,
.preview-panel::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.1), transparent);
    animation: glowPulse 8s ease-in-out infinite;
    z-index: 0;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.6; transform: scale(1.1); }
}

.input-panel > *,
.preview-panel > * {
    position: relative;
    z-index: 1;
}

.panel-header {
    margin-bottom: 2rem;
}

.panel-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    font-family: 'Space Grotesk', sans-serif;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.panel-header h2 i {
    color: var(--primary);
}

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

/* Type Selector */
.type-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0.75rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.type-btn i {
    font-size: 1.25rem;
}

.type-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.3);
    color: var(--primary);
}

.type-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.2);
}

/* Input Forms */
.input-forms {
    margin-bottom: 2rem;
}

.form-content {
    display: none;
}

.form-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.char-count {
    text-align: right;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

/* Customization Section */
.customization-section {
    margin-bottom: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.customization-section h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.customization-section h3 i {
    color: var(--primary);
}

.custom-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.option-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.option-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.color-picker {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.color-picker input[type="color"] {
    width: 50px;
    height: 40px;
    border: var(--border);
    border-radius: 8px;
    cursor: pointer;
    background: transparent;
}

.color-picker span {
    color: var(--text-secondary);
    font-family: monospace;
}

.option-group input[type="range"] {
    width: 100%;
}

.option-group span {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Generate Button */
.generate-btn {
    width: 100%;
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: 12px;
    color: white;
    font-weight: 600;
    font-size: 1.1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    box-shadow: var(--shadow-md);
}

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

.generate-btn:active {
    transform: translateY(0);
}

/* Preview Panel */
.qr-preview {
    min-height: 350px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.03);
    border: 2px dashed rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.qr-placeholder {
    text-align: center;
    color: var(--text-muted);
}

.qr-placeholder i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

#qrCanvas {
    max-width: 100%;
    border-radius: 8px;
}

/* QR Actions */
.qr-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: var(--border);
    border-radius: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.action-btn:hover {
    background: rgba(59, 130, 246, 0.15);
    border-color: var(--primary);
    color: var(--primary);
}

/* QR Stats */
.qr-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
}

.stat-item i {
    font-size: 1.5rem;
    color: var(--primary);
}

.stat-item div span {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-item div small {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ===============================================
   RECENT SECTION
   =============================================== */
.recent-section {
    margin-bottom: 3rem;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-header h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.75rem;
    font-weight: 700;
    font-family: 'Space Grotesk', sans-serif;
}

.section-header h2 i {
    color: var(--primary);
}

.clear-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: var(--border);
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
}

.clear-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: var(--danger);
    color: var(--danger);
}

.recent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
}

.no-history {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-secondary);
}

.no-history i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.history-item {
    background: var(--bg-card);
    border: var(--border);
    border-radius: 12px;
    padding: 1rem;
    transition: all 0.3s ease;
    cursor: pointer;
}

.history-item:hover {
    background: var(--bg-card-hover);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.history-item canvas {
    width: 100%;
    border-radius: 8px;
    margin-bottom: 0.75rem;
}

.history-info {
    font-size: 0.85rem;
}

.history-type {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.history-date {
    color: var(--text-muted);
}

/* ===============================================
   TOAST NOTIFICATION
   =============================================== */
.toast {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: var(--border);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 1rem;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 10000;
}

.toast.show {
    transform: translateX(0);
}

.toast i {
    color: var(--success);
    font-size: 1.2rem;
}

.toast span {
    color: var(--text-primary);
    font-weight: 500;
}

/* ===============================================
   RESPONSIVE DESIGN
   =============================================== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }

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

    .custom-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 100px 1.5rem 2rem;
    }

    .input-panel,
    .preview-panel {
        padding: 1.5rem;
    }

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

    .form-row {
        grid-template-columns: 1fr;
    }

    .qr-actions {
        grid-template-columns: 1fr;
    }

    .qr-stats {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 640px) {
    .nav-container {
        padding: 0 1rem;
    }

    .logo span {
        display: none;
    }

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

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

    .toast {
        right: 1rem;
        left: 1rem;
    }
}