/* AlphAstra App - Main Styles */

:root {
    --primary-color: #667eea;
    --primary-dark: #764ba2;
    --secondary-color: #3b82f6;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --white: #ffffff;
    --black: #000000;
    
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --radius-sm: 0.375rem;
    --radius: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    
    --transition: all 0.3s ease;
}

/* Dark Theme */
body.dark-theme {
    --gray-50: #1f2937;
    --gray-100: #374151;
    --gray-200: #4b5563;
    --gray-300: #6b7280;
    --gray-400: #9ca3af;
    --gray-500: #d1d5db;
    --gray-600: #e5e7eb;
    --gray-700: #f3f4f6;
    --gray-800: #f9fafb;
    --gray-900: #ffffff;
    --white: #111827;
    --black: #ffffff;
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.6;
    min-height: 100vh;
    transition: var(--transition);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Navigation */
.app-nav {
    background: var(--white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--gray-900);
    cursor: pointer;
    transition: var(--transition);
}

.nav-brand:hover {
    opacity: 0.8;
    transform: translateY(-1px);
}

.nav-logo {
    width: 40px;
    height: 40px;
}

.nav-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 0.5rem;
    flex: 1;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--gray-600);
    font-weight: 500;
    transition: var(--transition);
}

.nav-link:hover {
    background: var(--gray-100);
    color: var(--primary-color);
}

.nav-link.active {
    background: var(--gradient-primary);
    color: var(--white);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Main Content */
.app-main {
    padding: 3rem 0;
    min-height: calc(100vh - 80px);
}

/* Dashboard Hero */
.dashboard-hero {
    text-align: center;
    margin-bottom: 4rem;
}

.dashboard-hero h1 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.dashboard-hero p {
    font-size: 1.25rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
}

/* Scan Card */
.scan-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 800px;
    margin: 0 auto 2rem;
}

.scan-input-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.input-wrapper {
    flex: 1;
    min-width: 300px;
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray-400);
    font-size: 1.25rem;
}

.scan-input {
    width: 100%;
    padding: 1.25rem 3.5rem 1.25rem 3.5rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
    color: var(--gray-900);
}

.scan-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.scan-input.error {
    border-color: var(--danger-color);
}

.scan-input.success {
    border-color: var(--success-color);
}

.btn-clear {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

.btn-clear:hover {
    background: var(--gray-100);
    color: var(--gray-600);
}

.btn-scan {
    padding: 1.25rem 2.5rem;
    background: var(--gradient-primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    transition: var(--transition);
    white-space: nowrap;
}

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

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

.btn-scan:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

.url-validation {
    margin-top: 0.75rem;
    font-size: 0.875rem;
    min-height: 1.5rem;
}

.url-validation.error {
    color: var(--danger-color);
}

.url-validation.success {
    color: var(--success-color);
}

/* Loading State */
.loading-state {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    margin: 0 auto;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--gray-200);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 1.5rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-state p {
    font-size: 1.125rem;
    color: var(--gray-700);
    margin-bottom: 1.5rem;
}

.loading-progress {
    max-width: 400px;
    margin: 0 auto;
}

.progress-bar {
    height: 8px;
    background: var(--gray-200);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.progress-fill {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 999px;
    transition: width 0.3s ease;
    width: 0%;
}

.progress-text {
    font-size: 0.875rem;
    color: var(--gray-600);
    font-weight: 600;
}

/* Stats Section */
.stats-section {
    margin-bottom: 4rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    transition: var(--transition);
}

.stat-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-lg);
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--white);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* Recent Section */
.recent-section {
    margin-bottom: 4rem;
}

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

.section-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--gray-900);
}

.btn-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.btn-link:hover {
    color: var(--primary-dark);
}

.recent-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--gray-300);
}

.empty-state i {
    font-size: 4rem;
    color: var(--gray-300);
    margin-bottom: 1rem;
}

.empty-state p {
    color: var(--gray-600);
    font-size: 1.125rem;
}

/* Guide Section */
.guide-section {
    margin-bottom: 4rem;
}

.guide-card {
    background: var(--white);
    padding: 2.5rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.guide-card h3 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 2rem;
    text-align: center;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

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

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

.guide-step p {
    color: var(--gray-600);
    line-height: 1.6;
}

/* Buttons */
.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    background: var(--gray-100);
    color: var(--gray-600);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.btn-icon:hover {
    background: var(--gray-200);
    color: var(--gray-900);
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--white);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 1rem;
    min-width: 300px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left: 4px solid var(--success-color);
}

.toast.error {
    border-left: 4px solid var(--danger-color);
}

.toast.warning {
    border-left: 4px solid var(--warning-color);
}

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

.toast.success .toast-icon {
    color: var(--success-color);
}

.toast.error .toast-icon {
    color: var(--danger-color);
}

.toast.warning .toast-icon {
    color: var(--warning-color);
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 0.25rem;
}

.toast-message {
    font-size: 0.875rem;
    color: var(--gray-600);
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-wrap: wrap;
    }
    
    .nav-menu {
        order: 3;
        width: 100%;
        justify-content: center;
    }
    
    .nav-link span {
        display: none;
    }
    
    .dashboard-hero h1 {
        font-size: 2rem;
    }
    
    .scan-input-group {
        flex-direction: column;
    }
    
    .input-wrapper {
        min-width: 100%;
    }
    
    .btn-scan {
        width: 100%;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .guide-steps {
        grid-template-columns: 1fr;
    }
}