/* ============================================================
   LIQUID GLASS DESIGN SYSTEM
   Apple-Inspired Glassmorphism Aesthetic
   Shared styles for Repair Tracker Application
   ============================================================ */

/* Cairo Font from Google Fonts (imported separately in HTML) */
@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@300;400;500;600;700&display=swap');

/* ============================================================
   CSS VARIABLES - CORE DESIGN TOKENS
   ============================================================ */

:root {
    /* Apple-Inspired Color Palette */
    --color-primary: #007AFF;
    --color-primary-light: #5AC8FA;
    --color-primary-dark: #0051D5;
    --color-accent: #5E5CE6;
    --color-accent-dark: #4644CC;
    --color-accent-light: #BF5AF2;
    --color-success: #34C759;
    --color-warning: #FF9500;
    --color-error: #FF3B30;
    --color-info: #5AC8FA;

    /* Neutral Glass Tones */
    --color-background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    --color-bg: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 100%);
    --color-surface: rgba(255, 255, 255, 0.7);
    --color-surface-elevated: rgba(255, 255, 255, 0.85);
    --color-glass: rgba(255, 255, 255, 0.25);
    --color-glass-hover: rgba(255, 255, 255, 0.35);
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-light: rgba(255, 255, 255, 0.18);
    --color-text: #1D1D1F;
    --color-text-secondary: #6E6E73;
    --color-text-tertiary: #8E8E93;
    --color-text-light: #6E6E73;
    --color-text-inverse: #ffffff;

    /* Typography - Cairo Font for Perfect Arabic Support */
    --font-family: 'Cairo', -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI Arabic', 'Helvetica Neue', sans-serif;
    --font-family-display: 'Cairo', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Courier New', monospace;
    --font-size-base: 15px;
    --font-size-sm: 13px;
    --font-size-lg: 17px;
    --font-size-xl: 22px;
    --font-size-xxl: 28px;

    /* Spacing - Generous Apple-style */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-xxl: 48px;

    /* Glass Shadows - Soft & Layered */
    --shadow-xs: 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.16);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.08), inset 0 1px 1px rgba(255, 255, 255, 0.5);
    --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.06);

    /* Border Radius - Rounded Apple Style */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    --border-radius: 12px; /* Legacy support */

    /* Transitions - Smooth & Fluid */
    --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);

    /* Blur Effects */
    --blur-sm: 10px;
    --blur-md: 20px;
    --blur-lg: 40px;
}

/* ============================================================
   DARK MODE THEME VARIABLES
   ============================================================ */

[data-theme="dark"] {
    /* Apple-Inspired Dark Color Palette */
    --color-primary: #0A84FF;           /* Brighter blue for dark backgrounds */
    --color-primary-light: #64D2FF;
    --color-primary-dark: #0070E0;
    --color-accent: #7D7AFF;            /* Brighter purple */
    --color-accent-dark: #6B68FF;
    --color-accent-light: #DA8FFF;
    --color-success: #32D74B;           /* Brighter green */
    --color-warning: #FFD60A;           /* Brighter yellow/orange */
    --color-error: #FF453A;             /* Brighter red */
    --color-info: #64D2FF;

    /* Dark Glass Tones */
    --color-background: linear-gradient(135deg, #1c1c1e 0%, #2c2c2e 50%, #3a3a3c 100%);
    --color-bg: linear-gradient(135deg, #1c1c1e 0%, #2c2c2e 50%, #3a3a3c 100%);
    --color-surface: rgba(44, 44, 46, 0.7);
    --color-surface-elevated: rgba(58, 58, 60, 0.85);
    --color-glass: rgba(58, 58, 60, 0.3);
    --color-glass-hover: rgba(72, 72, 74, 0.4);
    --color-border: rgba(255, 255, 255, 0.12);
    --color-border-light: rgba(255, 255, 255, 0.18);
    --color-text: #F5F5F7;              /* Almost white */
    --color-text-secondary: #AEAEB2;    /* Gray text */
    --color-text-tertiary: #8E8E93;     /* Lighter gray */
    --color-text-light: #AEAEB2;
    --color-text-inverse: #1c1c1e;      /* Dark text for light backgrounds */

    /* Enhanced Shadows for Dark Mode */
    --shadow-xs: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
    --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4), inset 0 1px 1px rgba(255, 255, 255, 0.1);
    --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Update body background for dark mode */
[data-theme="dark"] body {
    background: linear-gradient(135deg, #1c1c1e 0%, #2c2c2e 50%, #3a3a3c 100%);
    background-attachment: fixed;
}

/* Dark mode gradient overlay */
[data-theme="dark"] body::before {
    background: radial-gradient(circle at 20% 50%, rgba(125, 122, 255, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(10, 132, 255, 0.08) 0%, transparent 50%);
}

/* ============================================================
   BASE STYLES & RESET
   ============================================================ */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    height: 100%;
    height: 100vh;
    height: 100dvh;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background: linear-gradient(135deg, #f5f7fa 0%, #e8ecf1 50%, #dfe4ea 100%);
    background-attachment: fixed;
    line-height: 1.6;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Animated background gradient overlay for depth */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(94, 92, 230, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(0, 122, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
    animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-display);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

h1 {
    font-size: var(--font-size-xxl);
    font-weight: 700;
}

h2 {
    font-size: var(--font-size-xl);
}

h3 {
    font-size: var(--font-size-lg);
}

/* ============================================================
   GLASS CARD COMPONENTS
   ============================================================ */

.glass-card {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-glass);
    padding: var(--space-xl);
    transition: all var(--transition-base);
}

.glass-card:hover {
    background: rgba(255, 255, 255, 0.8);
    box-shadow:
        0 12px 40px rgba(0, 0, 0, 0.1),
        inset 0 1px 1px rgba(255, 255, 255, 0.6);
    transform: translateY(-2px);
}

.glass-card-header {
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
}

.glass-card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    font-family: var(--font-family-display);
}

.glass-card-body {
    padding: var(--space-md) 0;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-lg);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
    user-select: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.25),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 122, 255, 0.35),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.2);
}

.btn-secondary {
    background: rgba(0, 0, 0, 0.04);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: rgba(0, 0, 0, 0.08);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn-success {
    background: var(--color-success);
    color: white;
    box-shadow: 0 4px 12px rgba(52, 199, 89, 0.25);
}

.btn-success:hover {
    background: #2FB84E;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(52, 199, 89, 0.35);
}

.btn-warning {
    background: var(--color-warning);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 149, 0, 0.25);
}

.btn-warning:hover {
    background: #E68600;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 149, 0, 0.35);
}

.btn-error {
    background: var(--color-error);
    color: white;
    box-shadow: 0 4px 12px rgba(255, 59, 48, 0.25);
}

.btn-error:hover {
    background: #E6352B;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 59, 48, 0.35);
}

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

/* ============================================================
   FORM ELEMENTS
   ============================================================ */

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    border: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    color: var(--color-text);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1),
                0 4px 12px rgba(0, 0, 0, 0.08);
}

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

/* ============================================================
   BADGES & STATUS INDICATORS
   ============================================================ */

.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-md);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
    white-space: nowrap;
}

.badge-primary {
    background: rgba(0, 122, 255, 0.12);
    color: var(--color-primary);
    border: 1px solid rgba(0, 122, 255, 0.2);
}

.badge-success {
    background: rgba(52, 199, 89, 0.12);
    color: var(--color-success);
    border: 1px solid rgba(52, 199, 89, 0.2);
}

.badge-warning {
    background: rgba(255, 149, 0, 0.12);
    color: var(--color-warning);
    border: 1px solid rgba(255, 149, 0, 0.2);
}

.badge-error {
    background: rgba(255, 59, 48, 0.12);
    color: var(--color-error);
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.badge-info {
    background: rgba(90, 200, 250, 0.12);
    color: var(--color-info);
    border: 1px solid rgba(90, 200, 250, 0.2);
}

/* ============================================================
   MODALS & OVERLAYS
   ============================================================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-base);
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform var(--transition-base);
}

.modal-overlay.active .modal {
    transform: scale(1);
}

.modal-header {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--color-border);
}

.modal-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    font-family: var(--font-family-display);
}

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

.modal-footer {
    padding: var(--space-xl);
    border-top: 1px solid var(--color-border);
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
}

/* ============================================================
   ALERTS & NOTIFICATIONS
   ============================================================ */

.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    border: 1px solid;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin-bottom: var(--space-lg);
}

.alert-success {
    background: rgba(52, 199, 89, 0.1);
    color: var(--color-success);
    border-color: rgba(52, 199, 89, 0.2);
}

.alert-warning {
    background: rgba(255, 149, 0, 0.1);
    color: var(--color-warning);
    border-color: rgba(255, 149, 0, 0.2);
}

.alert-error {
    background: rgba(255, 59, 48, 0.1);
    color: var(--color-error);
    border-color: rgba(255, 59, 48, 0.2);
}

.alert-info {
    background: rgba(90, 200, 250, 0.1);
    color: var(--color-info);
    border-color: rgba(90, 200, 250, 0.2);
}

/* ============================================================
   LOADING INDICATORS
   ============================================================ */

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(0, 122, 255, 0.2);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-text {
    color: var(--color-primary);
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: center;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ============================================================
   CUSTOM SCROLLBAR
   ============================================================ */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.25);
}

/* Scrollbar for dark mode */
[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ============================================================
   THEME TOGGLE COMPONENT
   ============================================================ */

.theme-toggle-container {
    position: relative;
    display: inline-block;
}

.theme-toggle {
    position: relative;
    width: 60px;
    height: 32px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 6px;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--color-glass-hover);
    box-shadow: var(--shadow-md);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.theme-icon {
    font-size: 16px;
    z-index: 2;
    transition: all var(--transition-base);
    opacity: 0.5;
    position: relative;
}

.theme-toggle-slider {
    position: absolute;
    width: 24px;
    height: 24px;
    background: var(--color-primary);
    border-radius: 50%;
    transition: all var(--transition-base);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    left: 4px;
}

/* Dark mode active state */
[data-theme="dark"] .theme-toggle-slider {
    left: calc(100% - 28px);
}

[data-theme="dark"] .theme-icon-dark {
    opacity: 1;
}

[data-theme="light"] .theme-icon-light,
:root:not([data-theme]) .theme-icon-light {
    opacity: 1;
}

/* ============================================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================================ */

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Enhanced focus indicators for dark mode */
[data-theme="dark"] *:focus-visible {
    outline-color: var(--color-primary);
}

/* ============================================================
   RTL (RIGHT-TO-LEFT) SUPPORT FOR ARABIC
   ============================================================ */

[dir="rtl"] {
    text-align: right;
}

[dir="rtl"] .modal-footer {
    flex-direction: row-reverse;
}

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

.hidden {
    display: none !important;
}

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

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

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

.pt-sm { padding-top: var(--space-sm); }
.pt-md { padding-top: var(--space-md); }
.pt-lg { padding-top: var(--space-lg); }
.pt-xl { padding-top: var(--space-xl); }

.pb-sm { padding-bottom: var(--space-sm); }
.pb-md { padding-bottom: var(--space-md); }
.pb-lg { padding-bottom: var(--space-lg); }
.pb-xl { padding-bottom: var(--space-xl); }

/* ============================================================
   RESPONSIVE DESIGN - MOBILE FIRST
   ============================================================ */

/* Mobile devices - small screens */
@media (max-width: 767px) {
    :root {
        --font-size-base: 14px;
        --font-size-sm: 12px;
        --font-size-lg: 16px;
        --font-size-xl: 20px;
        --font-size-xxl: 24px;
    }

    body {
        font-size: 16px; /* Prevent iOS zoom on input focus */
    }

    .glass-card {
        padding: var(--space-md);
        border-radius: var(--radius-lg);
    }

    .modal {
        width: 95%;
        max-height: 95vh;
    }

    .modal-header,
    .modal-body,
    .modal-footer {
        padding: var(--space-md);
    }

    .btn {
        min-height: 44px; /* Touch-friendly size */
        padding: var(--space-md) var(--space-lg);
    }

    .form-input,
    .form-textarea,
    .form-select {
        font-size: 16px; /* Prevent iOS zoom */
        min-height: 44px; /* Touch-friendly */
    }
}

/* Tablet devices */
@media (min-width: 768px) and (max-width: 1023px) {
    :root {
        --font-size-base: 14px;
        --font-size-lg: 16px;
        --font-size-xl: 20px;
    }
}

/* Desktop devices */
@media (min-width: 1024px) {
    /* Already using desktop sizes from root */
}

/* Large desktop */
@media (min-width: 1440px) {
    :root {
        --font-size-base: 16px;
        --font-size-lg: 18px;
        --font-size-xl: 24px;
        --font-size-xxl: 32px;
    }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
    .btn,
    .form-input,
    .form-textarea,
    .form-select {
        min-height: 44px;
        min-width: 44px;
    }

    /* Remove hover effects on touch devices */
    .btn:hover,
    .glass-card:hover {
        transform: none;
    }

    /* Add active/pressed states for touch feedback */
    .btn:active {
        transform: scale(0.98);
        opacity: 0.9;
    }
}