/* ==========================================================================
   LinkTec Design System - Theme System (Light/Dark Mode)
   ========================================================================== */

/* ─────────────────────────────────────────────────────────────────────────
   LIGHT THEME (Default)
   ───────────────────────────────────────────────────────────────────────── */

:root,
[data-theme="light"] {
    /* Background Colors - Pure white and very light grays */
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f8;
    --bg-tertiary: #efefef;
    --bg-elevated: #ffffff;

    /* Text Colors - Dark but not pure black */
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-tertiary: #6b6b6b;
    --text-muted: #9a9a9a;

    /* Border Colors - Very subtle */
    --border-primary: rgba(0, 0, 0, 0.08);
    --border-secondary: rgba(0, 0, 0, 0.04);
    --border-hover: rgba(180, 142, 103, 0.4);

    /* Glass Effects */
    --glass-bg: rgba(255, 255, 255, 0.9);
    --glass-border: rgba(0, 0, 0, 0.08);

    /* Shadows - Soft and subtle */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.06);
    --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.08);

    /* Component-specific - Clean white/light gray */
    --input-bg: #ffffff;
    --input-border: #e0e0e0;
    --card-bg: #ffffff;
    --header-bg: rgba(255, 255, 255, 0.95);
    --sidebar-bg: #f7f7f8;

    /* Gold accents - unchanged */
    --color-gold: #b48e67;
    --color-gold-light: #c9a882;
    --color-gold-dark: #8b6d4f;
    --color-gold-glow: rgba(180, 142, 103, 0.15);
}

/* ─────────────────────────────────────────────────────────────────────────
   DARK THEME
   ───────────────────────────────────────────────────────────────────────── */

[data-theme="dark"] {
    /* Background Colors */
    --bg-primary: #1c1c1e;
    --bg-secondary: #2c2c2e;
    --bg-tertiary: #3a3a3c;
    --bg-elevated: #2c2c2e;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #aeaeb2;
    --text-tertiary: #8e8e93;
    --text-muted: #545454;

    /* Border Colors */
    --border-primary: rgba(255, 255, 255, 0.1);
    --border-secondary: rgba(255, 255, 255, 0.05);
    --border-hover: rgba(180, 142, 103, 0.3);

    /* Glass Effects */
    --glass-bg: rgba(28, 28, 30, 0.85);
    --glass-border: rgba(255, 255, 255, 0.1);

    /* Shadows */
    --shadow-sm: 0 1px 2px 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, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 10px 10px -5px rgba(0, 0, 0, 0.3);

    /* Component-specific */
    --input-bg: #2c2c2e;
    --input-border: #3a3a3c;
    --card-bg: #2c2c2e;
    --header-bg: rgba(28, 28, 30, 0.85);
    --sidebar-bg: #2c2c2e;

    /* Gold accents */
    --color-gold: #b48e67;
    --color-gold-light: #c9a882;
    --color-gold-dark: #8b6d4f;
    --color-gold-glow: rgba(180, 142, 103, 0.2);
}

/* ─────────────────────────────────────────────────────────────────────────
   THEME TOGGLE BUTTON
   ───────────────────────────────────────────────────────────────────────── */

.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    padding: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    border-color: var(--color-gold);
    color: var(--color-gold);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-base);
}

.theme-toggle:hover svg {
    transform: rotate(15deg);
}

/* Moon icon - visible in light mode (default) */
.theme-toggle .icon-moon {
    display: block;
}

.theme-toggle .icon-sun {
    display: none;
}

/* Sun icon - visible in dark mode */
[data-theme="dark"] .theme-toggle .icon-moon {
    display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    display: block;
}

/* ─────────────────────────────────────────────────────────────────────────
   APPLY THEME VARIABLES TO ELEMENTS
   ───────────────────────────────────────────────────────────────────────── */

/* Body */
body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

/* Text */
h1,
h2,
h3,
h4,
h5,
h6 {
    color: var(--text-primary);
}

p {
    color: var(--text-secondary);
}

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

/* Links */
a {
    color: var(--color-gold);
}

a:hover {
    color: var(--color-gold-light);
}

/* Cards */
.card {
    background: var(--card-bg);
    border-color: var(--border-primary);
}

.card:hover {
    border-color: var(--border-hover);
}

.card-glass {
    background: var(--glass-bg);
    border-color: var(--glass-border);
}

/* Forms */
.form-input,
.form-textarea,
.form-select {
    background: var(--input-bg);
    border-color: var(--border-primary);
    color: var(--text-primary);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--color-gold);
    box-shadow: 0 0 0 3px var(--color-gold-glow);
}

.form-label {
    color: var(--text-primary);
}

/* Navigation */
.nav-link {
    color: var(--text-secondary);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-tertiary);
}

.nav-link.active {
    color: var(--color-gold);
}

/* Header */
.header {
    background: var(--header-bg);
    border-bottom-color: var(--border-primary);
}

/* Sidebar */
.sidebar {
    background: var(--sidebar-bg);
    border-right-color: var(--border-primary);
}

.sidebar-link {
    color: var(--text-secondary);
}

.sidebar-link:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-link.active {
    background: var(--color-gold-glow);
    color: var(--color-gold);
}

/* Tables */
.table th {
    color: var(--text-tertiary);
}

.table td {
    color: var(--text-primary);
}

.table th,
.table td {
    border-bottom-color: var(--border-primary);
}

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

/* Dividers */
.divider {
    background: linear-gradient(90deg, transparent, var(--border-primary), transparent);
}

/* Tooltips */
[data-tooltip]::after {
    background: var(--bg-elevated);
    color: var(--text-primary);
}

/* Progress */
.progress {
    background: var(--bg-tertiary);
}

/* Scrollbar for light mode */
[data-theme="light"] ::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

[data-theme="light"] ::-webkit-scrollbar-thumb {
    background: var(--text-muted);
}

[data-theme="light"] ::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* Selection for light mode */
[data-theme="light"] ::selection {
    background-color: var(--color-gold);
    color: white;
}

/* ─────────────────────────────────────────────────────────────────────────
   LOGO SWITCHING
   ───────────────────────────────────────────────────────────────────────── */

.logo-img {
    height: 44px;
    width: auto;
}

/* Sidebar logo slightly smaller */
.sidebar-logo-img {
    height: 40px;
    width: auto;
}

/* Light mode (default): show black logo */
.logo-light {
    display: block;
}

.logo-dark {
    display: none;
}

/* Dark mode: show beige/gold logo */
[data-theme="dark"] .logo-light {
    display: none;
}

[data-theme="dark"] .logo-dark {
    display: block;
}

/* ─────────────────────────────────────────────────────────────────────────
   THEME TRANSITION
   ───────────────────────────────────────────────────────────────────────── */

body,
.header,
.sidebar,
.card,
.form-input,
.form-textarea,
.form-select,
.btn,
.nav-link,
.sidebar-link {
    transition: background-color var(--transition-base),
        border-color var(--transition-base),
        color var(--transition-base);
}

/* ─────────────────────────────────────────────────────────────────────────
   LIGHT MODE SPECIFIC OVERRIDES
   ───────────────────────────────────────────────────────────────────────── */

/* Cards with subtle shadows in light mode */
:root .card,
[data-theme="light"] .card {
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-primary);
}

:root .card:hover,
[data-theme="light"] .card:hover {
    box-shadow: var(--shadow-md);
}

/* Stat cards */
:root .stat-card,
[data-theme="light"] .stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-sm);
}

/* Dashboard sections */
:root .dashboard-section,
[data-theme="light"] .dashboard-section {
    background: var(--card-bg);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-sm);
}

/* Pricing cards */
:root .pricing-card,
[data-theme="light"] .pricing-card {
    background: var(--card-bg);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-md);
}

/* Quote cards */
:root .quote-card,
[data-theme="light"] .quote-card {
    background: var(--card-bg);
    border: 1px solid var(--border-primary);
}

/* FAQ items */
:root .faq-item,
[data-theme="light"] .faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-primary);
}

/* Form inputs with white background */
:root .form-input,
:root .form-select,
:root .form-textarea,
[data-theme="light"] .form-input,
[data-theme="light"] .form-select,
[data-theme="light"] .form-textarea {
    background: var(--input-bg);
    border: 1px solid var(--input-border);
}

/* Validation banner */
:root .validation-banner,
[data-theme="light"] .validation-banner {
    background: linear-gradient(135deg, rgba(255, 159, 10, 0.08) 0%, rgba(255, 159, 10, 0.02) 100%);
    border: 1px solid rgba(255, 159, 10, 0.2);
}

/* Project items hover */
:root .project-item:hover,
[data-theme="light"] .project-item:hover {
    background: var(--bg-secondary);
}

/* Document items hover */
:root .document-item:hover,
[data-theme="light"] .document-item:hover {
    background: var(--bg-secondary);
}

/* Upload zone */
:root .upload-zone,
[data-theme="light"] .upload-zone {
    border-color: var(--border-primary);
}

:root .upload-zone:hover,
[data-theme="light"] .upload-zone:hover {
    border-color: var(--color-gold);
    background: var(--color-gold-glow);
}

/* Portfolio section background */
:root .portfolio,
[data-theme="light"] .portfolio {
    background: var(--bg-secondary);
}

/* Quote section background */
:root .quote-section,
[data-theme="light"] .quote-section {
    background: var(--bg-secondary);
}

/* FAQ section background */
:root .faq-section,
[data-theme="light"] .faq-section {
    background: var(--bg-secondary);
}