/**
 * AdSyncFlow Pro - Design System Core
 * Modern AI-focused design system with advanced animations
 * Version: 2.0
 */

/* ============================================
   COLOR PALETTE - AI/Digital Theme
   ============================================ */
:root {
    /* Primary Colors - AI Gradient */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #38bdf8;
    --color-accent: #a855f7;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-info: #06b6d4;
    
    /* Neutral Colors */
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-border: #e2e8f0;
    --color-heading: #0f172a;
    --color-body: #475569;
    --color-muted: #94a3b8;
    --color-disabled: #cbd5e0;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    --gradient-secondary: linear-gradient(135deg, #06b6d4 0%, #38bdf8 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #22d3ee 100%);
    --gradient-danger: linear-gradient(135deg, #f97316 0%, #ef4444 100%);
    --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #eef2ff 50%, #f8fafc 100%);
    
    /* Shadows */
    --shadow-xs: 0 2px 8px rgba(15, 23, 42, 0.06);
    --shadow-sm: 0 4px 12px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.12);
    --shadow-lg: 0 16px 48px rgba(15, 23, 42, 0.15);
    --shadow-xl: 0 24px 64px rgba(15, 23, 42, 0.20);
    --shadow-glow: 0 0 24px rgba(99, 102, 241, 0.25);
    
    /* Border Radius */
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius-md: 14px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Spacing */
    --space-xs: 8px;
    --space-sm: 12px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    
    /* Typography */
    --font-sans: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", "Courier New", monospace;
    
    --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;
    --font-size-4xl: 2.5rem;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    
    /* Layout */
    --container-max-width: 1600px;
    --content-max-width: 1400px;
    --sidebar-width: 280px;
}

/* ============================================
   GLOBAL 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-sans);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: 1.6;
    color: var(--color-body);
    background: var(--gradient-bg);
    min-height: 100vh;
}

/* ============================================
   LAYOUT SYSTEM
   ============================================ */
.page-wrapper {
    width: 100%;
    max-width: 100%;
    min-height: calc(100vh - 80px);
}

.page-content {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: var(--space-2xl) var(--space-lg);
}

.content-container {
    width: 100%;
    max-width: var(--content-max-width);
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

/* ============================================
   GRID SYSTEM
   ============================================ */
.row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    margin: 0 calc(-1 * var(--space-lg) / 2);
}

.row > * {
    padding: 0 calc(var(--space-lg) / 2);
}

.col { flex: 1 1 0; min-width: 0; }
.col-1 { flex: 0 0 calc(100% / 12 * 1); max-width: calc(100% / 12 * 1); }
.col-2 { flex: 0 0 calc(100% / 12 * 2); max-width: calc(100% / 12 * 2); }
.col-3 { flex: 0 0 calc(100% / 12 * 3); max-width: calc(100% / 12 * 3); }
.col-4 { flex: 0 0 calc(100% / 12 * 4); max-width: calc(100% / 12 * 4); }
.col-6 { flex: 0 0 calc(100% / 12 * 6); max-width: calc(100% / 12 * 6); }
.col-8 { flex: 0 0 calc(100% / 12 * 8); max-width: calc(100% / 12 * 8); }
.col-9 { flex: 0 0 calc(100% / 12 * 9); max-width: calc(100% / 12 * 9); }
.col-12 { flex: 0 0 100%; max-width: 100%; }

/* ============================================
   PAGE HEADER
   ============================================ */
.page-header {
    background: var(--color-surface);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    padding: clamp(32px, 4vw, 56px);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
    animation: fadeInDown 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(circle at right top, rgba(99, 102, 241, 0.12), transparent 70%);
    pointer-events: none;
}

.page-header h1 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: var(--font-weight-extrabold);
    color: var(--color-heading);
    margin: 0 0 var(--space-sm) 0;
    position: relative;
    z-index: 1;
}

.page-header p {
    font-size: clamp(0.95rem, 1.5vw, 1.1rem);
    color: var(--color-muted);
    margin: 0;
    max-width: 800px;
    position: relative;
    z-index: 1;
}

.page-header-icon {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    margin-bottom: var(--space-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: iconFloat 4s ease-in-out infinite;
}

/* ============================================
   CARD SYSTEM
   ============================================ */
.card {
    background: var(--color-surface);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--color-border);
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) backwards;
}

.card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(145deg, rgba(99, 102, 241, 0.04), rgba(56, 189, 248, 0.04));
    opacity: 0;
    transition: var(--transition-base);
    pointer-events: none;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(99, 102, 241, 0.2);
}

.card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.card-title {
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    font-weight: var(--font-weight-bold);
    color: var(--color-heading);
    margin: 0;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.card-body {
    padding: var(--space-lg);
}

/* ============================================
   FORM ELEMENTS
   ============================================ */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-heading);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-control,
.form-select {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-heading);
    background: rgba(255, 255, 255, 0.9);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    outline: none;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.12);
    background: #ffffff;
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: var(--color-muted);
    font-weight: var(--font-weight-normal);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
}

select.form-control[multiple] {
    padding: var(--space-sm);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: 12px 24px;
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    line-height: 1;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transform: translateX(-100%);
    transition: transform 0.6s;
}

.btn:hover::before {
    transform: translateX(100%);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: var(--color-border);
    color: var(--color-heading);
}

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

.btn-danger {
    background: var(--gradient-danger);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.4);
}

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

.btn-outline-primary:hover {
    background: var(--color-primary);
    color: #ffffff;
    transform: translateY(-2px);
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: 16px 32px;
    font-size: var(--font-size-lg);
}

/* ============================================
   TABLES
   ============================================ */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-family: var(--font-sans);
    font-size: var(--font-size-sm);
}

table thead {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.08), rgba(56, 189, 248, 0.06));
    position: sticky;
    top: 0;
    z-index: 10;
}

table thead th {
    padding: 16px;
    text-align: left;
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}

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

table tbody tr:hover {
    background: linear-gradient(90deg, rgba(99, 102, 241, 0.04), rgba(56, 189, 248, 0.02));
    transform: translateX(2px);
}

table tbody td {
    padding: 14px 16px;
    color: var(--color-body);
    font-weight: var(--font-weight-medium);
}

table tbody tr:last-child {
    border-bottom: none;
}

/* Summary Row Styles */
.summary-row {
    background: var(--gradient-primary) !important;
    color: #ffffff !important;
    font-weight: var(--font-weight-bold);
}

.summary-row td {
    color: #ffffff !important;
    padding: 18px 16px !important;
}

/* Metric Cell Styles */
.metric-cell {
    text-align: right;
    font-weight: var(--font-weight-semibold);
    font-variant-numeric: tabular-nums;
}

/* ============================================
   BADGES & CHIPS
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.metric-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    border: 1px solid rgba(99, 102, 241, 0.2);
    box-shadow: var(--shadow-xs);
    transition: var(--transition-base);
}

.metric-chip:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.metric-chip i {
    font-size: 1.1em;
}

/* ============================================
   ALERTS & NOTIFICATIONS
   ============================================ */
.alert {
    padding: 18px 24px;
    border-radius: var(--radius-md);
    border-left: 4px solid;
    margin-bottom: var(--space-lg);
    animation: slideInLeft 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: var(--shadow-sm);
}

.alert-success {
    background: rgba(16, 185, 129, 0.08);
    border-color: var(--color-success);
    color: #065f46;
}

.alert-danger {
    background: rgba(239, 68, 68, 0.08);
    border-color: var(--color-danger);
    color: #991b1b;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.08);
    border-color: var(--color-warning);
    color: #92400e;
}

.alert-info {
    background: rgba(6, 182, 212, 0.08);
    border-color: var(--color-info);
    color: #0c4a6e;
}

/* ============================================
   ANIMATIONS
   ============================================ */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translate3d(0, -30px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 30px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translate3d(-30px, 0, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translate3d(30px, 0, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

@keyframes iconFloat {
    0%, 100% {
        transform: translateY(0) rotate(0deg);
    }
    50% {
        transform: translateY(-8px) rotate(5deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.8;
        transform: scale(1.05);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) backwards;
}

.fade-in-down {
    animation: fadeInDown 0.6s cubic-bezier(0.16, 1, 0.3, 1) backwards;
}

/* Stagger animations */
.card:nth-child(1) { animation-delay: 0ms; }
.card:nth-child(2) { animation-delay: 100ms; }
.card:nth-child(3) { animation-delay: 200ms; }
.card:nth-child(4) { animation-delay: 300ms; }
.card:nth-child(5) { animation-delay: 400ms; }

/* ============================================
   LOADING STATES
   ============================================ */
.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.skeleton {
    background: linear-gradient(
        90deg,
        rgba(148, 163, 184, 0.1) 25%,
        rgba(148, 163, 184, 0.2) 50%,
        rgba(148, 163, 184, 0.1) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-md);
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */
@media (max-width: 1400px) {
    .content-container {
        max-width: 1200px;
    }
}

@media (max-width: 1200px) {
    .page-content {
        padding: var(--space-xl) var(--space-md);
    }
    
    .col-3,
    .col-4,
    .col-6 {
        flex: 0 0 calc(50% - var(--space-lg));
        max-width: calc(50% - var(--space-lg));
    }
}

@media (max-width: 768px) {
    .page-content {
        padding: var(--space-lg) var(--space-sm);
    }
    
    .content-container {
        gap: var(--space-md);
    }
    
    .card {
        border-radius: var(--radius-lg);
    }
    
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        padding: var(--space-md);
    }
    
    .card-body {
        padding: var(--space-md);
    }
    
    .row {
        gap: var(--space-md);
    }
    
    .col-3,
    .col-4,
    .col-6,
    .col-8,
    .col-9 {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    table {
        font-size: var(--font-size-xs);
    }
    
    table thead th,
    table tbody td {
        padding: 10px 12px;
    }
}

@media (max-width: 576px) {
    :root {
        font-size: 14px;
    }
    
    .page-header {
        padding: var(--space-lg);
    }
    
    .btn {
        padding: 10px 18px;
        font-size: var(--font-size-sm);
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.text-muted { color: var(--color-muted); }

.bg-primary { background: var(--color-primary); }
.bg-gradient-primary { background: var(--gradient-primary); }

.d-flex { display: flex; }
.d-block { display: block; }
.d-none { display: none; }

.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }

.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }

.fw-normal { font-weight: var(--font-weight-normal); }
.fw-medium { font-weight: var(--font-weight-medium); }
.fw-semibold { font-weight: var(--font-weight-semibold); }
.fw-bold { font-weight: var(--font-weight-bold); }

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-sm);
    border: 2px solid var(--color-bg);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-primary) var(--color-bg);
}