/* ============================================
   DESIGN SYSTEM - CSS Variables
   ============================================ */
:root {
    /* Colors - Premium Palette */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #13131a;
    --color-bg-tertiary: #1a1a24;
    --color-bg-card: rgba(26, 26, 36, 0.8);
    --color-bg-elevated: rgba(30, 30, 42, 0.95);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #ec4899 0%, #f43f5e 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #14b8a6 100%);
    --gradient-border: linear-gradient(135deg, rgba(99, 102, 241, 0.5), rgba(139, 92, 246, 0.5));

    /* Text Colors */
    --color-text-primary: #f8fafc;
    --color-text-secondary: #cbd5e1;
    --color-text-tertiary: #94a3b8;
    --color-text-muted: #64748b;

    /* Accent Colors */
    --color-accent-purple: #8b5cf6;
    --color-accent-blue: #6366f1;
    --color-accent-pink: #ec4899;
    --color-accent-green: #10b981;
    --color-accent-red: #ef4444;
    --color-accent-yellow: #f59e0b;

    /* Border & Divider */
    --color-border: rgba(148, 163, 184, 0.1);
    --color-border-hover: rgba(148, 163, 184, 0.2);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6), 0 10px 10px -5px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(236, 72, 153, 0.05) 0%, transparent 50%);
    animation: backgroundShift 20s ease-in-out infinite;
    z-index: -1;
}

@keyframes backgroundShift {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    50% {
        transform: translate(-10%, -10%) rotate(5deg);
    }
}

/* ============================================
   LAYOUT
   ============================================ */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* ============================================
   HEADER
   ============================================ */
.header {
    margin-bottom: var(--spacing-2xl);
    animation: slideDown 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo-icon {
    width: 48px;
    height: 48px;
    filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.4));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-8px);
    }
}

.logo-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.25rem;
}

.logo-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    font-weight: 500;
}

.header-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    font-family: var(--font-family);
}

.btn svg {
    width: 18px;
    height: 18px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-elevated);
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.btn-gradient {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
    font-size: var(--font-size-base);
    padding: 1rem 2rem;
}

.btn-gradient:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.5);
}

.btn-success {
    background: var(--gradient-success);
    color: white;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(16, 185, 129, 0.4);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn-ghost:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    border-color: var(--color-accent-purple);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.card-body {
    padding: var(--spacing-xl);
}

/* ============================================
   BADGE
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.875rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    background: var(--gradient-primary);
    color: white;
    border-radius: 9999px;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

/* ============================================
   INPUT SECTION
   ============================================ */
.input-section {
    margin-bottom: var(--spacing-xl);
}

.url-input {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    color: var(--color-text-primary);
    resize: vertical;
    transition: all var(--transition-base);
    line-height: 1.6;
}

.url-input:focus {
    outline: none;
    border-color: var(--color-accent-purple);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1), var(--shadow-glow);
}

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

.input-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-lg);
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ============================================
   PROGRESS SECTION
   ============================================ */
.progress-section {
    margin-bottom: var(--spacing-xl);
}

.progress-card {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.9;
    }
}

.progress-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-bg-tertiary);
    border-top-color: var(--color-accent-purple);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.progress-text {
    flex: 1;
}

.progress-label {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.progress-status {
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
}

.progress-bar-container {
    height: 6px;
    background: var(--color-bg-secondary);
    border-radius: 9999px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 9999px;
    transition: width var(--transition-base);
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.6);
}

/* ============================================
   RESULTS SECTION
   ============================================ */
.results-section {
    margin-bottom: var(--spacing-xl);
}

.results-stats {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
}

.results-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
}

.results-table thead {
    background: var(--color-bg-secondary);
    position: sticky;
    top: 0;
    z-index: 10;
}

.results-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    font-size: var(--font-size-xs);
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-border);
}

.results-table tbody tr {
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.results-table tbody tr:hover {
    background: var(--color-bg-secondary);
}

.results-table td {
    padding: var(--spacing-md);
    color: var(--color-text-primary);
    vertical-align: top;
}

/* Column Widths */
.col-url {
    width: 20%;
}

.col-title {
    width: 25%;
}

.col-meta {
    width: 30%;
}

.col-h1 {
    width: 20%;
}

.col-status {
    width: 5%;
}

/* Cell Styles */
.cell-url {
    color: var(--color-accent-blue);
    text-decoration: none;
    word-break: break-all;
    font-size: var(--font-size-xs);
    transition: color var(--transition-fast);
}

.cell-url:hover {
    color: var(--color-accent-purple);
    text-decoration: underline;
}

.cell-text {
    line-height: 1.5;
}

.cell-h1-list {
    list-style: none;
    padding: 0;
}

.cell-h1-list li {
    padding: 0.375rem 0;
    border-bottom: 1px solid var(--color-border);
}

.cell-h1-list li:last-child {
    border-bottom: none;
}

.status-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.status-success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-accent-green);
}

.status-error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-accent-red);
}

.status-warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--color-accent-yellow);
}

.status-icon svg {
    width: 18px;
    height: 18px;
}

.empty-state {
    color: var(--color-text-muted);
    font-style: italic;
    font-size: var(--font-size-sm);
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
    border-top: 1px solid var(--color-border);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 768px) {
    .app-container {
        padding: var(--spacing-md);
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .logo-title {
        font-size: var(--font-size-xl);
    }

    .header-actions {
        width: 100%;
    }

    .header-actions .btn {
        flex: 1;
    }

    .input-actions {
        flex-direction: column;
    }

    .input-actions .btn {
        width: 100%;
    }

    .table-container {
        overflow-x: scroll;
    }

    .results-table {
        min-width: 800px;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-muted {
    color: var(--color-text-muted);
}

.text-success {
    color: var(--color-accent-green);
}

.text-error {
    color: var(--color-accent-red);
}

.text-warning {
    color: var(--color-accent-yellow);
}