/* NihongoLab Dark Theme - WaniKani Inspired */

:root {
    /* Core Colors */
    --bg-primary: #0d0d0f;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #232342;
    --bg-card: #1e1e35;
    --bg-card-hover: #252547;

    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b80;

    /* Accent Colors */
    --accent-primary: #00d4ff;      /* Cyan - primary actions */
    --accent-primary-hover: #00b8e6;
    --accent-secondary: #ff6b9d;    /* Pink - kanji/highlights */
    --accent-tertiary: #a855f7;     /* Purple - grammar */
    --accent-vocab: #22c55e;        /* Green - vocabulary */
    --accent-kanji: #f472b6;        /* Pink - kanji */
    --accent-grammar: #a78bfa;      /* Purple - grammar */

    /* Status Colors */
    --success: #22c55e;
    --success-bg: rgba(34, 197, 94, 0.15);
    --error: #ef4444;
    --error-bg: rgba(239, 68, 68, 0.15);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.15);

    /* Borders */
    --border-color: #2a2a45;
    --border-light: #3a3a55;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #a855f7 100%);
    --gradient-card: linear-gradient(180deg, #1e1e35 0%, #1a1a2e 100%);
}

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

/* Utility classes for the dark theme */
.bg-dark-primary { background-color: var(--bg-primary); }
.bg-dark-secondary { background-color: var(--bg-secondary); }
.bg-dark-tertiary { background-color: var(--bg-tertiary); }
.bg-dark-card { background-color: var(--bg-card); }

.text-dark-primary { color: var(--text-primary); }
.text-dark-secondary { color: var(--text-secondary); }
.text-dark-muted { color: var(--text-muted); }

.border-dark { border-color: var(--border-color); }
.border-dark-light { border-color: var(--border-light); }

/* Card styling */
.card-dark {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    transition: all 0.2s ease;
}

.card-dark:hover {
    background-color: var(--bg-card-hover);
    border-color: var(--border-light);
    box-shadow: var(--shadow-md);
}

/* Button styles */
.btn-primary {
    background: var(--accent-primary);
    color: var(--bg-primary);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.btn-primary:hover {
    background: var(--accent-primary-hover);
    box-shadow: var(--shadow-glow);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-light);
}

/* Navigation styling */
.nav-dark {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.nav-link {
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

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

/* Input styling */
.input-dark {
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
}

.input-dark:focus {
    border-color: var(--accent-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.input-dark::placeholder {
    color: var(--text-muted);
}

/* Progress bar */
.progress-bar-dark {
    background-color: var(--bg-tertiary);
    border-radius: 9999px;
    overflow: hidden;
}

.progress-bar-fill {
    background: var(--gradient-primary);
    height: 100%;
    border-radius: 9999px;
    transition: width 0.5s ease;
}

/* Badge styles */
.badge-vocab {
    background-color: rgba(34, 197, 94, 0.15);
    color: var(--accent-vocab);
}

.badge-kanji {
    background-color: rgba(244, 114, 182, 0.15);
    color: var(--accent-kanji);
}

.badge-grammar {
    background-color: rgba(167, 139, 250, 0.15);
    color: var(--accent-grammar);
}

/* Level badges */
.badge-n5 {
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    color: white;
}

.badge-n4 {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
}

.badge-n3 {
    background: linear-gradient(135deg, #a855f7 0%, #9333ea 100%);
    color: white;
}

.badge-n2 {
    background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
    color: white;
}

.badge-n1 {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
}

/* Flashcard styling */
.flashcard-dark {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: 1.5rem;
    box-shadow: var(--shadow-lg);
}

/* Quiz option buttons */
.quiz-option-dark {
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem;
    border-radius: 0.75rem;
    transition: all 0.2s ease;
    text-align: left;
    width: 100%;
}

.quiz-option-dark:hover {
    border-color: var(--accent-primary);
    background-color: rgba(0, 212, 255, 0.1);
}

.quiz-option-correct {
    border-color: var(--success) !important;
    background-color: var(--success-bg) !important;
}

.quiz-option-incorrect {
    border-color: var(--error) !important;
    background-color: var(--error-bg) !important;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Animations */
@keyframes glow {
    0%, 100% { box-shadow: 0 0 5px rgba(0, 212, 255, 0.3); }
    50% { box-shadow: 0 0 20px rgba(0, 212, 255, 0.5); }
}

.glow-effect {
    animation: glow 2s ease-in-out infinite;
}

/* Modal styling */
.modal-dark {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: var(--shadow-lg);
}

.modal-header-dark {
    background: var(--gradient-primary);
    padding: 1.5rem;
    border-radius: 1rem 1rem 0 0;
}

/* Dropdown styling */
.dropdown-dark {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    box-shadow: var(--shadow-lg);
}

.dropdown-item-dark {
    color: var(--text-secondary);
    padding: 0.5rem 1rem;
    transition: all 0.2s ease;
}

.dropdown-item-dark:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

/* Stats card styling */
.stat-card {
    background: var(--gradient-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.5rem;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Study rating buttons */
.rating-easy {
    background-color: rgba(34, 197, 94, 0.15);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.rating-easy:hover {
    background-color: rgba(34, 197, 94, 0.25);
}

.rating-good {
    background-color: rgba(59, 130, 246, 0.15);
    color: #3b82f6;
    border: 1px solid rgba(59, 130, 246, 0.3);
}

.rating-good:hover {
    background-color: rgba(59, 130, 246, 0.25);
}

.rating-hard {
    background-color: rgba(245, 158, 11, 0.15);
    color: #f59e0b;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.rating-hard:hover {
    background-color: rgba(245, 158, 11, 0.25);
}

.rating-again {
    background-color: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.rating-again:hover {
    background-color: rgba(239, 68, 68, 0.25);
}