/* SilaLingo Base Styles - Refactored for Bootstrap 5 */

/* ========================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ======================================== */
:root {
    /* Colors - Thai-inspired palette */
    --color-primary: #0D9488;
    /* Teal - Kinnaree inspired */
    --color-primary-dark: #0F766E;
    --color-primary-light: #14B8A6;
    --color-secondary: #F59E0B;
    /* Gold - Thai temples */
    --color-secondary-dark: #D97706;

    /* Mastery level colors */
    --mastery-0: #9CA3AF;
    /* Seed - Gray */
    --mastery-1: #86EFAC;
    /* Sprout - Light green */
    --mastery-2: #4ADE80;
    /* Sapling */
    --mastery-3: #22C55E;
    /* Young Tree */
    --mastery-4: #16A34A;
    /* Mature Tree */
    --mastery-5: #15803D;
    /* Flowering */
    --mastery-6: #166534;
    /* Fruiting */
    --mastery-7: #14532D;
    /* Ancient - Dark green */

    /* Typography */
    --font-family-latin: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-family-thai-cursive: 'Mali', 'Sarabun', sans-serif;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;

    /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    /* Border Radius */
    --radius-sm: 0.125rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    --radius-2xl: 1rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Font Sizes */
    --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: 1.875rem;

    /* Colors */
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;

    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
}

/* ========================================
   BOOTSTRAP OVERRIDES & GLOBAL STYLES
   ======================================== */

html, body {
    height: 100%;
}

body {
    font-family: var(--font-family-latin);
    background-color: #F8FAFC;
    color: #1E293B;
    display: flex;
    flex-direction: column;
}

/* Thai text styling */
.thai-text,
[lang="th"] {
    font-family: var(--font-family-thai);
}

.thai-cursive {
    font-family: var(--font-family-thai-cursive);
}

.thai-large {
    font-size: 3rem;
    line-height: 1.4;
}

/* Bootstrap Overrides */
.text-primary {
    color: var(--color-primary) !important;
}

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

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

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

.btn-outline-primary {
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

/* Navbar Brand Special styling */
.navbar-brand .logo {
    font-size: 1.5rem;
    margin-right: 0.5rem;
}

.navbar-brand .brand-text {
    font-weight: 700;
    color: var(--color-primary);
}

/* Navbar Tweaks */
.navbar {
    background-color: #fff;
    box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05);
}

.nav-link {
    font-weight: 500;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

/* Footer Tweaks */
.footer {
    background-color: #1E293B;
    color: #CBD5E1;
    padding: 3rem 0;
    margin-top: auto;
}

.footer a {
    color: #94A3B8;
    text-decoration: none;
    margin-right: 1.5rem;
}

.footer a:hover {
    color: #fff;
}

/* Mastery Colors for Progress Bars/Badges */
.bg-mastery-0 {
    background-color: var(--mastery-0);
}

.bg-mastery-1 {
    background-color: var(--mastery-1);
}

.bg-mastery-2 {
    background-color: var(--mastery-2);
}

.bg-mastery-3 {
    background-color: var(--mastery-3);
}

.bg-mastery-4 {
    background-color: var(--mastery-4);
}

.bg-mastery-5 {
    background-color: var(--mastery-5);
}

.bg-mastery-6 {
    background-color: var(--mastery-6);
}

.bg-mastery-7 {
    background-color: var(--mastery-7);
}

/* ========================================
   FORM SWITCHES (Bootstrap 5 Override)
   ======================================== */

/* Fix for toggle switches showing as dots or empty */
.form-check-input {
    width: 3em;
    height: 1.5em;
    margin-top: 0.25em;
    vertical-align: top;
    background-color: #dee2e6;
    background-repeat: no-repeat;
    background-position: left center;
    background-size: contain;
    border: 1px solid rgba(0, 0, 0, 0.25);
    appearance: none;
    print-color-adjust: exact;
}

.form-check-input:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

.form-check-input:focus {
    border-color: var(--color-primary-light);
    outline: 0;
    box-shadow: 0 0 0 0.25rem rgba(13, 148, 136, 0.25);
}

.form-check-input[type="checkbox"] {
    border-radius: 0.25em;
}

.form-switch .form-check-input {
    width: 2em;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='rgba%280, 0, 0, 0.25%29'/%3e%3c/svg%3e");
    background-position: left center;
    border-radius: 2em;
    transition: background-position 0.15s ease-in-out;
}

.form-switch .form-check-input:checked {
    background-position: right center;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='%23fff'/%3e%3c/svg%3e");
}

.form-switch .form-check-input:focus {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='-4 -4 8 8'%3e%3ccircle r='3' fill='rgba%280, 0, 0, 0.25%29'/%3e%3c/svg%3e");
}

/* ========================================
   CUSTOM CHECKBOX (Remember Me)
   ======================================== */

.custom-check {
    padding-left: 2.25rem;
}

.custom-check .custom-check-input {
    width: 1.25rem;
    height: 1.25rem;
    margin-left: -2.25rem;
    margin-top: 0;
    border-radius: 0.25rem;
    border: 2px solid #d1d5db;
    background-color: #fff;
    transition: all 0.2s ease;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: none;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    vertical-align: middle;
    position: relative;
    flex-shrink: 0;
}

.custom-check .custom-check-input:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='white' d='M13.854 3.646a.5.5 0 0 1 0 .708l-7 7a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6.5 10.293l6.646-6.647a.5.5 0 0 1 .708 0z'/%3e%3c/svg%3e");
    background-size: 100% 100%;
}

.custom-check .custom-check-input:focus {
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
    outline: none;
}

.custom-check .custom-check-label {
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: #6b7280;
    user-select: none;
}