/**
 * Mobile-First Custom Styles
 * Sarabun Font Integration & Thai UI Enhancements
 */

/* ============================================================================
   FONT FACE - Sarabun (Thai Google Font - CDN)
   Using Google Fonts CDN for reliability
   ============================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sarabun:wght@400;500;600;700&display=swap');

/* ============================================================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================================================ */

:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-success: #10b981;
    --color-success-hover: #059669;
    --color-warning: #f59e0b;
    --color-warning-hover: #d97706;
    --color-danger: #ef4444;
    --color-danger-hover: #dc2626;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-900: #111827;

    /* Spacing */
    --spacing-xs: 0.25rem;
    /* 4px */
    --spacing-sm: 0.5rem;
    /* 8px */
    --spacing-md: 1rem;
    /* 16px */
    --spacing-lg: 1.5rem;
    /* 24px */
    --spacing-xl: 2rem;
    /* 32px */

    /* Touch Targets (Mobile) */
    --touch-target-min: 44px;

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;

    /* 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);
}

/* ============================================================================
   BASE STYLES - MOBILE FIRST
   ============================================================================ */

* {
    font-family: 'Sarabun', sans-serif;
}

body {
    font-size: 14px;
    /* Mobile base */
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-gray-50);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Tablet and up */
@media (min-width: 768px) {
    body {
        font-size: 16px;
    }
}

/* ============================================================================
   LAYOUT - MOBILE FIRST
   ============================================================================ */

/* Mobile: Full width container */
.container-app {
    width: 100%;
    padding: var(--spacing-md);
}

/* Tablet */
@media (min-width: 768px) {
    .container-app {
        padding: var(--spacing-lg);
    }
}

/* Desktop */
@media (min-width: 1024px) {
    .container-app {
        padding: var(--spacing-xl);
        max-width: 1280px;
        margin: 0 auto;
    }
}

/* ============================================================================
   NAVIGATION - RESPONSIVE
   ============================================================================ */

/* Bottom Tab Bar (Mobile Only) */
.bottom-tab-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid var(--color-gray-200);
    display: flex;
    justify-content: space-around;
    padding: var(--spacing-sm) 0;
    z-index: 1000;
}

.bottom-tab-bar a {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    min-width: var(--touch-target-min);
    min-height: var(--touch-target-min);
    padding: var(--spacing-xs);
    color: var(--color-gray-600);
    text-decoration: none;
    font-size: 11px;
    transition: color var(--transition-fast);
}

.bottom-tab-bar a.active,
.bottom-tab-bar a:hover {
    color: var(--color-primary);
}

/* Hide bottom bar on tablet/desktop */
@media (min-width: 768px) {
    .bottom-tab-bar {
        display: none !important;
    }
}

/* Sidebar (Tablet/Desktop) */
.sidebar {
    display: none;
    /* Hidden on mobile */
}

@media (min-width: 1024px) {
    .sidebar {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 240px;
        height: 100vh;
        background: white;
        border-right: 1px solid var(--color-gray-200);
        overflow-y: auto;
    }

    .main-content-with-sidebar {
        margin-left: 240px;
    }
}

/* Hamburger Menu (Mobile/Tablet) */
.hamburger-menu {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    background: white;
    box-shadow: var(--shadow-lg);
    transition: left var(--transition-normal);
    z-index: 2000;
    overflow-y: auto;
}

.hamburger-menu.open {
    left: 0;
}

.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1999;
    display: none;
}

.menu-overlay.show {
    display: block;
}

@media (min-width: 1024px) {

    .hamburger-menu,
    .menu-overlay {
        display: none !important;
    }
}

/* ============================================================================
   TOUCH-OPTIMIZED COMPONENTS
   ============================================================================ */

/* Buttons - Large on mobile */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    /* Mobile touch target */
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 500;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
}

.btn:active {
    transform: scale(0.98);
    /* Haptic-style feedback */
}

@media (min-width: 768px) {
    .btn {
        min-height: 40px;
        padding: 8px 16px;
    }
}

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

.btn-primary:hover {
    background-color: var(--color-primary-hover);
}

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

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

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

/* Form Inputs - Large on mobile */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    height: 48px;
    padding: 12px 16px;
    font-size: 16px;
    /* Prevent iOS zoom */
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast);
}

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

@media (min-width: 768px) {

    .form-input,
    .form-select {
        height: 40px;
        padding: 8px 12px;
        font-size: 14px;
    }
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ============================================================================
   CARDS - RESPONSIVE SPACING
   ============================================================================ */

.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

@media (min-width: 768px) {
    .card {
        padding: var(--spacing-lg);
        margin-bottom: var(--spacing-lg);
    }
}

/* ============================================================================
   THAI TEXT UTILITIES
   ============================================================================ */

.thai-number {
    font-variant-numeric: tabular-nums;
}

.thai-date-short {
    white-space: nowrap;
}

/* ============================================================================
   TOAST NOTIFICATIONS - POSITION ADAPTS
   ============================================================================ */

.toast-container {
    position: fixed;
    bottom: 80px;
    /* Above bottom tab bar on mobile */
    left: 50%;
    transform: translateX(-50%);
    z-index: 3000;
    width: calc(100% - 32px);
    max-width: 400px;
}

@media (min-width: 768px) {
    .toast-container {
        top: 20px;
        bottom: auto;
        right: 20px;
        left: auto;
        transform: none;
    }
}

.toast {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    border-left: 4px solid var(--color-primary);
    animation: slideInUp 0.3s ease-out;
}

@media (min-width: 768px) {
    .toast {
        animation: slideInRight 0.3s ease-out;
    }
}

@keyframes slideInUp {
    from {
        transform: translateY(100%);
        opacity: 0;
    }

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

@keyframes slideInRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }

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

/* ============================================================================
   LOADING SKELETON
   ============================================================================ */

.skeleton {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }

    100% {
        background-position: -200% 0;
    }
}

/* ============================================================================
   DRAG & DROP FILE UPLOAD
   ============================================================================ */

.file-drop-zone {
    border: 2px dashed var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    cursor: pointer;
    min-height: 150px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.file-drop-zone.dragover {
    border-color: var(--color-primary);
    background-color: rgba(37, 99, 235, 0.05);
}

.file-drop-zone:hover {
    border-color: var(--color-primary);
}

/* ============================================================================
   PRINT STYLES (for PDF generation)
   ============================================================================ */

@media print {
    body {
        background: white;
        font-size: 12pt;
    }

    .no-print {
        display: none !important;
    }

    .print-page-break {
        page-break-after: always;
    }
}

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

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

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

.mt-0 {
    margin-top: 0;
}

.mb-0 {
    margin-bottom: 0;
}

.hidden {
    display: none;
}

.pointer {
    cursor: pointer;
}