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

/* ========================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ======================================== */
:root {
    /* Kinnaree Mascot Palette */
    --color-gold: #F59E0B;
    --color-gold-dark: #D97706;
    --color-gold-light: #FCD34D;
    --color-gold-fade: #FEF3C7;

    --color-emerald: #059669;
    --color-emerald-dark: #047857;
    --color-emerald-light: #34D399;
    --color-emerald-fade: #D1FAE5;

    --color-teal: #0D9488;
    --color-teal-dark: #0F766E;
    --color-teal-light: #5EEAD4;
    --color-teal-fade: #CCFBF1;

    --color-coral: #FB7185;
    --color-coral-dark: #E11D48;
    --color-coral-light: #FECDD3;
    --color-coral-fade: #FFF1F2;

    /* Semantic mapping */
    --color-primary: var(--color-emerald);
    --color-primary-dark: var(--color-emerald-dark);
    --color-primary-light: var(--color-emerald-light);
    --color-cta: var(--color-gold);
    --color-cta-dark: var(--color-gold-dark);
    --color-cta-light: var(--color-gold-light);
    --color-secondary: var(--color-teal);
    --color-secondary-dark: var(--color-teal-dark);

    /* Mastery level colors - emerald gradient */
    --mastery-0: #9CA3AF;
    --mastery-1: #6EE7B7;
    --mastery-2: #34D399;
    --mastery-3: #10B981;
    --mastery-4: #059669;
    --mastery-5: #047857;
    --mastery-6: #065F46;
    --mastery-7: #064E3B;

    /* Typography */
    --font-family-latin: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-family-thai: 'Sarabun', sans-serif;
    --font-family-thai-cursive: 'Mali', 'Sarabun', sans-serif;
    --font-family-romanization: 'Charis SIL', 'Noto Sans', 'Inter', 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 - warmer tint */
    --shadow-sm: 0 1px 2px 0 rgba(217, 119, 6, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(217, 119, 6, 0.08), 0 2px 4px -1px rgba(217, 119, 6, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(217, 119, 6, 0.1), 0 4px 6px -2px rgba(217, 119, 6, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(217, 119, 6, 0.12), 0 10px 10px -5px rgba(217, 119, 6, 0.04);

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.25rem;
    --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;

    /* Neutrals */
    --color-white: #ffffff;
    --color-bg: #FFFBF7;
    --color-bg-warm: #FFF7ED;
    --color-gray-50: #fafaf9;
    --color-gray-100: #f5f5f4;
    --color-gray-200: #e7e5e4;
    --color-gray-300: #d6d3d1;
    --color-gray-400: #a8a29e;
    --color-gray-500: #78716c;
    --color-gray-600: #57534e;
    --color-gray-700: #44403c;
    --color-gray-800: #292524;
    --color-gray-900: #1c1917;

    --color-success: #10B981;
    --color-warning: #F59E0B;
    --color-error: #FB7185;
}

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

html {
    height: auto;
}

body {
    min-height: 100dvh;
}

body {
    font-family: var(--font-family-latin);
    background-color: var(--color-bg);
    color: var(--color-gray-800);
    display: flex;
    flex-direction: column;
}

/* Thai font — set per user preference via data-thai-font on <body> */
body[data-thai-font="sarabun"] { --font-family-thai: 'Sarabun', sans-serif; }
body[data-thai-font="noto"]    { --font-family-thai: 'Noto Sans Thai', sans-serif; }
body[data-thai-font="prompt"] { --font-family-thai: 'Prompt', sans-serif; }
body[data-thai-font="mali"]    { --font-family-thai: 'Mali', sans-serif; }

/* Romanization text uses a font with strong IPA / combining mark support */
.romanization {
    font-family: var(--font-family-romanization);
}

/* 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;
}

/* ========================================
   LINKS - Remove Bootstrap Blue
   ======================================== */
a {
    color: var(--color-teal);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-teal-dark);
    text-decoration: none;
}

a:not([href]):not([class]),
a:not([href]):not([class]):hover {
    color: inherit;
    text-decoration: none;
}

/* ========================================
   BOOTSTRAP COLOR UTILITIES
   ======================================== */

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

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

/* CTA Buttons - Gold */
.btn-primary {
    background-color: var(--color-cta);
    border-color: var(--color-cta);
    color: #fff;
}

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

.btn-primary:focus,
.btn-primary:active {
    background-color: var(--color-cta-dark) !important;
    border-color: var(--color-cta-dark) !important;
    box-shadow: 0 0 0 0.25rem rgba(245, 158, 11, 0.35) !important;
}

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

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

/* Success - Emerald */
.text-success {
    color: var(--color-success) !important;
}

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

/* Danger - Coral */
.text-danger {
    color: var(--color-error) !important;
}

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

/* Warning - Gold */
.text-warning {
    color: var(--color-warning) !important;
}

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

/* Info - Teal */
.text-info {
    color: var(--color-teal) !important;
}

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

/* Secondary */
.text-secondary {
    color: var(--color-gray-500) !important;
}

/* ========================================
   NAVBAR
   ======================================== */

.navbar-brand .logo {
    font-size: 1.5rem;
    margin-right: 0.5rem;
}

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

.navbar {
    background-color: #fff;
    box-shadow: 0 1px 3px 0 rgba(217, 119, 6, 0.08);
}

.nav-link {
    font-weight: 500;
    color: var(--color-gray-600);
    text-decoration: none;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-emerald);
    text-decoration: none;
}

.navbar-user-toggle {
    color: #374151;
    background-color: #fff;
    border: 1px solid #D1D5DB;
    transition: all 0.2s ease;
}

.navbar-user-toggle:hover {
    color: #374151;
    border-color: #9CA3AF;
    background-color: #F3F4F6;
}

/* Center navbar content on small screens (collapsed state) */
@media (max-width: 991.98px) {
    .navbar-collapse {
        padding: 1.5rem 0;
        text-align: center;
    }

    .navbar-collapse .navbar-nav {
        align-items: center !important;
        justify-content: center !important;
        width: 100%;
        margin-right: 0 !important;
        margin-left: 0 !important;
    }

    .navbar-collapse .navbar-nav .nav-item {
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .navbar-collapse .navbar-nav .nav-link {
        text-align: center;
        padding: 0.75rem 1rem;
        width: 100%;
    }

    .navbar-collapse .dropdown-menu {
        text-align: center;
        border: none;
        background: transparent;
        padding: 0;
        margin: 0;
    }

    .navbar-collapse .dropdown-item {
        justify-content: center;
        text-align: center;
    }

    /* Center the right-side controls (stats, bell, user) */
    .navbar-collapse .ms-auto {
        margin-top: 1rem;
        padding-top: 1rem;
        border-top: 1px solid var(--color-gray-200);
        gap: 1.5rem !important;
    }
}

.dropdown-item:hover,
.dropdown-item:focus {
    background-color: #f3f4f6;
    color: #1f2937;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background-color: #F5F5F0;
    color: #374151;
    border-top: 1px solid rgba(5, 150, 105, 0.12);
    padding: 2.5rem 0;
    margin-top: auto;
}

.footer a {
    color: #6B7280;
    text-decoration: none;
    margin-right: 1.5rem;
    transition: color 0.2s ease;
}

.footer a:hover {
    color: #059669;
}

/* ========================================
   MASTERY COLORS
   ======================================== */

.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 CHECKS & SWITCHES
   ======================================== */

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

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

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

/* Custom switch styling – clean white circle knob, no checkmark */
.form-switch {
    padding-left: 3.2em;
}

.form-switch .form-check-input {
    width: 2.8em;
    height: 1.5em;
    margin-left: -3.2em;
    background-image: none !important;
    border-radius: 2em;
    position: relative;
    cursor: pointer;
    background-color: #e5e7eb;
    border-color: #d1d5db;
    margin-top: 0;
    transition: background-color 0.2s ease-in-out, border-color 0.2s ease-in-out;
}

.form-switch .form-check-input::after {
    content: '';
    position: absolute;
    top: 0.2em;
    left: 0.2em;
    width: 1.1em;
    height: 1.1em;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s ease-in-out;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

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

.form-switch .form-check-input:checked::after {
    transform: translateX(1.3em);
}

/* ========================================
   CUSTOM CHECKBOX
   ======================================== */

.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-gold);
    border-color: var(--color-gold);
    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-gold-light);
    box-shadow: 0 0 0 3px rgba(245, 158, 11, 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;
}

/* Navbar premium badge */
.navbar-premium-badge {
    cursor: default;
    pointer-events: none;
}

/* ========================================
   KINNAREE ACCENT UTILITIES
   ======================================== */

.text-gold {
    color: var(--color-gold) !important;
}

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

.bg-gold-light {
    background-color: var(--color-gold-fade) !important;
}

.text-emerald {
    color: var(--color-emerald) !important;
}

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

.text-teal {
    color: var(--color-teal) !important;
}

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

.text-coral {
    color: var(--color-coral) !important;
}

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

.bg-coral-light {
    background-color: var(--color-coral-fade) !important;
}

/* Warm card tint */
.card-warm {
    background: linear-gradient(135deg, #ffffff 0%, var(--color-bg-warm) 100%);
    border: 1px solid rgba(245, 158, 11, 0.12);
}

/* ========================================
   BOOTSTRAP CHECKED STATE FIX
   Prevent blue default on checked outline buttons
   ======================================== */

.btn-check:checked + .btn-outline-primary,
.btn-check:active + .btn-outline-primary,
.btn-outline-primary:active,
.btn-outline-primary.active,
.btn-outline-primary.dropdown-toggle.show {
    background-color: var(--color-cta);
    border-color: var(--color-cta);
    color: #fff;
}

.btn-check:focus + .btn-outline-primary {
    box-shadow: 0 0 0 0.25rem rgba(245, 158, 11, 0.35);
}

.empty-state-img {
    max-height: 120px;
}

/* ========================================
   THAI COMBINING MARK DISPLAY
   De-emphasise the carrier consonant so
   users don't confuse it with the mark.
   ======================================== */

.combining-base {
    opacity: 0.35;
    font-weight: 300;
}

/* ========================================
   ACHIEVEMENT TOAST
   ======================================== */

.achievement-toast-container {
    position: fixed;
    top: 80px;
    right: 16px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    pointer-events: none;
    max-width: 380px;
    width: calc(100vw - 32px);
}

.achievement-toast-container .achievement-toast {
    pointer-events: auto;
}

.achievement-toast {
    position: relative;
    border-radius: 16px;
    padding: 16px 18px;
    color: #fff;
    overflow: hidden;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25), 0 2px 8px rgba(0, 0, 0, 0.15);
    animation: achievement-slide-in 0.45s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    transform-origin: top right;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.achievement-toast.hiding {
    animation: achievement-slide-out 0.35s cubic-bezier(0.55, 0, 1, 0.45) forwards;
}

/* Tier gradients */
.achievement-toast--bronze {
    background: linear-gradient(135deg, #8B5A2B 0%, #CD7F32 50%, #D4A574 100%);
}
.achievement-toast--silver {
    background: linear-gradient(135deg, #6B7280 0%, #9CA3AF 50%, #C0C0C0 100%);
}
.achievement-toast--gold {
    background: linear-gradient(135deg, #B45309 0%, #F59E0B 50%, #FCD34D 100%);
}
.achievement-toast--platinum {
    background: linear-gradient(135deg, #0F766E 0%, #14B8A6 50%, #5EEAD4 100%);
}

/* Shine overlay */
.achievement-toast::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
    animation: achievement-shine 2.5s ease-in-out infinite;
    pointer-events: none;
}

.achievement-toast__content {
    position: relative;
    z-index: 1;
    display: flex;
    align-items: flex-start;
    gap: 14px;
}

.achievement-toast__icon {
    font-size: 2.25rem;
    line-height: 1;
    flex-shrink: 0;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
}

.achievement-toast__body {
    flex: 1;
    min-width: 0;
}

.achievement-toast__header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 2px;
}

.achievement-toast__name {
    font-weight: 700;
    font-size: 1rem;
    line-height: 1.3;
    text-shadow: 0 1px 2px rgba(0,0,0,0.25);
}

.achievement-toast__tier {
    font-size: 0.65rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid rgba(255, 255, 255, 0.25);
    flex-shrink: 0;
}

.achievement-toast__xp {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-top: 4px;
    padding: 3px 10px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.achievement-toast__description {
    font-size: 0.8rem;
    opacity: 0.9;
    margin-top: 6px;
    line-height: 1.4;
    text-shadow: 0 1px 1px rgba(0,0,0,0.15);
}

.achievement-toast__close {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.2);
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    line-height: 1;
    padding: 0;
    transition: background 0.2s ease, color 0.2s ease;
    z-index: 2;
}

.achievement-toast__close:hover {
    background: rgba(0, 0, 0, 0.35);
    color: #fff;
}

.achievement-toast__progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 0 0 16px 16px;
    overflow: hidden;
}

.achievement-toast__progress-bar {
    height: 100%;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 0 0 16px 16px;
    transform-origin: left;
    animation: achievement-progress 5s linear forwards;
}

@keyframes achievement-slide-in {
    from {
        opacity: 0;
        transform: translateX(120%) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes achievement-slide-out {
    from {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateX(120%) scale(0.9);
    }
}

@keyframes achievement-shine {
    0% { left: -100%; }
    40% { left: 150%; }
    100% { left: 150%; }
}

@keyframes achievement-progress {
    from { transform: scaleX(1); }
    to { transform: scaleX(0); }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .achievement-toast {
        animation: none;
        opacity: 1;
        transform: none;
    }
    .achievement-toast.hiding {
        animation: none;
        opacity: 0;
    }
    .achievement-toast::before {
        animation: none;
        display: none;
    }
    .achievement-toast__progress-bar {
        animation: none;
    }
}

/* Mobile */
@media (max-width: 576px) {
    .achievement-toast-container {
        top: 70px;
        right: 12px;
        left: 12px;
        width: auto;
        max-width: none;
    }
    .achievement-toast {
        padding: 14px 16px;
    }
    .achievement-toast__icon {
        font-size: 1.75rem;
    }
}
