/* ================================================================
   SEO MASTER PRO - GLOBAL STYLES
   Complete Design System & Base Styles
   ================================================================ */

/* ================================================================
   CSS VARIABLES (Design Tokens)
   ================================================================ */
:root {
    /* Colors - Primary (Blue for Admin) */
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-primary-light: #60a5fa;
    --color-primary-rgb: 37, 99, 235;

    /* Colors - Secondary (Gold for Client) */
    --color-secondary: #d4af37;
    --color-secondary-dark: #b8941f;
    --color-secondary-light: #f7dc6f;
    --color-secondary-rgb: 212, 175, 55;

    /* Colors - Neutral */
    --color-dark: #0a0a0a;
    --color-darker: #050505;
    --color-gray-900: #1a1a1a;
    --color-gray-800: #2a2a2a;
    --color-gray-700: #3a3a3a;
    --color-gray-600: #4a4a4a;
    --color-gray-500: #6b7280;
    --color-gray-400: #9ca3af;
    --color-gray-300: #d1d5db;
    --color-gray-200: #e5e7eb;
    --color-gray-100: #f3f4f6;
    --color-white: #ffffff;

    /* Colors - Text */
    --color-text-primary: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-tertiary: #64748b;
    --color-text-inverse: #1a1a1a;

    /* Colors - Status */
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Colors - Background */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --bg-card: rgba(37, 99, 235, 0.05);
    --bg-hover: rgba(37, 99, 235, 0.1);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.3);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', monospace;

    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
    --text-5xl: 3rem;

    /* Font Weights */
    --font-light: 300;
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;
    --font-extrabold: 800;
    --font-black: 900;

    /* Line Heights */
    --leading-tight: 1.25;
    --leading-snug: 1.375;
    --leading-normal: 1.5;
    --leading-relaxed: 1.625;
    --leading-loose: 2;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* Z-Index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

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

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

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--color-text-primary);
    line-height: var(--leading-normal);
    overflow-x: hidden;
}

/* ================================================================
   TYPOGRAPHY
   ================================================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--color-white);
}

h1 { font-size: var(--text-4xl); margin-bottom: var(--spacing-lg); }
h2 { font-size: var(--text-3xl); margin-bottom: var(--spacing-md); }
h3 { font-size: var(--text-2xl); margin-bottom: var(--spacing-md); }
h4 { font-size: var(--text-xl); margin-bottom: var(--spacing-sm); }
h5 { font-size: var(--text-lg); margin-bottom: var(--spacing-sm); }
h6 { font-size: var(--text-base); margin-bottom: var(--spacing-sm); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

strong, b {
    font-weight: var(--font-bold);
}

small {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

code {
    font-family: var(--font-mono);
    background: var(--bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

/* ================================================================
   UTILITY CLASSES
   ================================================================ */

/* Display */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-inline-block { display: inline-block !important; }
.d-flex { display: flex !important; }
.d-inline-flex { display: inline-flex !important; }
.d-grid { display: grid !important; }

/* Flex */
.flex-row { flex-direction: row; }
.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }
.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.align-start { align-items: flex-start; }
.align-end { align-items: flex-end; }
.align-center { align-items: center; }
.align-stretch { align-items: stretch; }
.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text Color */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-tertiary { color: var(--color-text-tertiary); }
.text-white { color: var(--color-white); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }
.text-info { color: var(--color-info); }

/* Font Weight */
.font-light { font-weight: var(--font-light); }
.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

/* Margins */
.m-0 { margin: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.ml-auto { margin-left: auto; }
.mr-auto { margin-right: auto; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Padding */
.p-0 { padding: 0; }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

/* Width */
.w-full { width: 100%; }
.w-auto { width: auto; }

/* Position */
.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }
.position-sticky { position: sticky; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-scroll { overflow: scroll; }

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

/* ================================================================
   BUTTONS
   ================================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.75rem 1.5rem;
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    line-height: 1;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(var(--color-primary-rgb), 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--color-text-primary);
    border: 1px solid var(--color-gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-gray-700);
    border-color: var(--color-gray-600);
}

.btn-success {
    background: var(--color-success);
    color: var(--color-white);
}

.btn-warning {
    background: var(--color-warning);
    color: var(--color-white);
}

.btn-error {
    background: var(--color-error);
    color: var(--color-white);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-gray-700);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--color-text-primary);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: var(--text-sm);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: var(--text-lg);
}

.btn-icon {
    padding: 0.75rem;
    width: 2.75rem;
    height: 2.75rem;
}

/* ================================================================
   FORMS
   ================================================================ */
.form-group {
    margin-bottom: var(--spacing-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: var(--text-base);
    font-family: inherit;
    background: var(--bg-tertiary);
    border: 1px solid var(--color-gray-700);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.form-input::placeholder {
    color: var(--color-text-tertiary);
}

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

.form-error {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--text-sm);
    color: var(--color-error);
}

.form-help {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.form-checkbox,
.form-radio {
    width: 1.25rem;
    height: 1.25rem;
    cursor: pointer;
}

/* ================================================================
   CARDS
   ================================================================ */
.card {
    background: var(--bg-card);
    border: 1px solid rgba(var(--color-primary-rgb), 0.2);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 20px 40px rgba(var(--color-primary-rgb), 0.2);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-gray-800);
}

.card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-bold);
    color: var(--color-white);
    margin: 0;
}

.card-body {
    color: var(--color-text-secondary);
}

.card-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-gray-800);
}

/* ================================================================
   BADGES
   ================================================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background: rgba(var(--color-primary-rgb), 0.1);
    color: var(--color-primary-light);
    border: 1px solid rgba(var(--color-primary-rgb), 0.3);
}

.badge-success {
    background: rgba(34, 197, 94, 0.1);
    color: #86efac;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.1);
    color: #fcd34d;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.badge-error {
    background: rgba(239, 68, 68, 0.1);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.badge-info {
    background: rgba(59, 130, 246, 0.1);
    color: #93c5fd;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

/* ================================================================
   TABLES
   ================================================================ */
.table-container {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-gray-800);
}

.table {
    width: 100%;
    border-collapse: collapse;
}

.table thead {
    background: var(--bg-tertiary);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
    font-size: var(--text-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 1px solid var(--color-gray-800);
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--color-gray-900);
    color: var(--color-text-secondary);
}

.table tbody tr {
    transition: background var(--transition-fast);
}

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

/* ================================================================
   ALERTS
   ================================================================ */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.alert-success {
    background: rgba(34, 197, 94, 0.1);
    border: 1px solid rgba(34, 197, 94, 0.3);
    color: #86efac;
}

.alert-warning {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    color: #fcd34d;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.alert-info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #93c5fd;
}

/* ================================================================
   MODALS
   ================================================================ */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    backdrop-filter: blur(4px);
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--color-gray-800);
    border-radius: var(--radius-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
    z-index: var(--z-modal);
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid var(--color-gray-800);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--color-white);
    margin: 0;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--text-2xl);
    cursor: pointer;
    padding: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-hover);
    color: var(--color-text-primary);
}

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

.modal-footer {
    padding: var(--spacing-xl);
    border-top: 1px solid var(--color-gray-800);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--spacing-md);
}

/* ================================================================
   LOADING SPINNER
   ================================================================ */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-700);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 20px;
    height: 20px;
    border-width: 2px;
}

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

/* ================================================================
   TOOLTIPS
   ================================================================ */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip-text {
    visibility: hidden;
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-tertiary);
    color: var(--color-text-primary);
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-md);
    font-size: var(--text-sm);
    white-space: nowrap;
    z-index: var(--z-tooltip);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
}

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 1024px) {
    :root {
        --text-4xl: 2rem;
        --text-3xl: 1.75rem;
    }
}

@media (max-width: 768px) {
    :root {
        --text-4xl: 1.75rem;
        --text-3xl: 1.5rem;
        --text-2xl: 1.25rem;
    }

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

    .btn {
        padding: 0.625rem 1.25rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

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