/* ========================================
   JapaneseLanguagePro — Global Shared Styles
   ======================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Outfit:wght@400;500;600;700&display=swap');
@import url('shared-auth.css');
@import url('shared-static.css');

/* ── Design Tokens ───────────────────── */

:root {
    /* Color Palette — Warm & Professional */
    --color-accent: #c9a77c;
    --color-accent-hover: #b8946a;
    --color-accent-light: rgba(201, 167, 124, 0.15);

    --color-success: #5a7c5a;
    --color-success-hover: #4a6b4a;
    --color-success-light: rgba(90, 124, 90, 0.15);

    --color-warning: #c9a050;
    --color-warning-light: rgba(201, 160, 80, 0.15);

    --color-danger: #b85c5c;
    --color-danger-hover: #a34d4d;
    --color-danger-light: rgba(184, 92, 92, 0.15);

    /* Neutrals — Warm Dark Theme */
    --color-bg: #0d1117;
    --color-surface: #161b22;
    --color-surface-hover: #1c2128;
    --color-surface-glass: rgba(22, 27, 34, 0.85);
    --color-surface-raised: #1f242c;

    --color-border: rgba(201, 167, 124, 0.12);
    --color-border-hover: rgba(201, 167, 124, 0.25);
    --color-border-active: rgba(201, 167, 124, 0.4);

    --color-text: #f0e6d3;
    --color-text-secondary: #a89b8c;
    --color-text-muted: #6b5f52;

    /* Typography */
    --font-ui: 'Inter', system-ui, -apple-system, sans-serif;
    --font-heading: 'Inter', var(--font-ui);
    --font-jp: 'Noto Sans JP', var(--font-ui);

    --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;
    --font-size-4xl: 2.25rem;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Layout */
    --header-height: 60px;
    --container-max-width: 1100px;
    --container-sm-width: 480px;
    --container-md-width: 640px;

    /* Borders & Shadows — Minimal */
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 4px;
    --radius-xl: 4px;
    --radius-full: 4px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.3);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-bounce: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── Reset ──────────────────────────── */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-ui);
    font-size: var(--font-size-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-hover);
}

button {
    font-family: var(--font-ui);
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

/* ── Layout Shell ───────────────────── */

.app-layout {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.main-content {
    flex: 1;
    padding-top: var(--header-height);
}

/* ── Utilities ──────────────────────── */

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-sm {
    max-width: var(--container-sm-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-md {
    max-width: var(--container-md-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.jp-text {
    font-family: var(--font-jp);
    font-weight: 500;
}

.glass-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 0;
}

.page-section {
    padding: var(--spacing-3xl) 0;
}

.page-header {
    margin-bottom: var(--spacing-2xl);
}

.page-header h1 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.page-header p {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ── Animations ─────────────────────── */

@keyframes slideUpFade {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

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

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

.animate-slide-up {
    animation: slideUpFade var(--transition-bounce) forwards;
}

.animate-fade-in {
    animation: fadeIn var(--transition-normal) forwards;
}

/* ── Buttons ───────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 0.5rem 1.25rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
    line-height: 1.4;
    text-decoration: none;
}

.btn:focus-visible {
    outline: 1px solid var(--color-accent);
    outline-offset: 2px;
}

.btn-sm {
    padding: 0.375rem 1rem;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: var(--font-size-base);
}

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

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

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-surface-hover);
    border-color: var(--color-border-hover);
    color: var(--color-text);
}

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

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

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

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

.btn-outline {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

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

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    padding: 0.5rem 0.75rem;
}

.btn-ghost:hover {
    color: var(--color-text);
    background: var(--color-surface);
}

.btn[disabled],
.btn:disabled {
    opacity: 0.5;
    pointer-events: none;
}

.btn-block {
    width: 100%;
}

/* ── Forms ─────────────────────────── */

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

.form-group label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.form-control {
    width: 100%;
    padding: 0.625rem 0.875rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-family: var(--font-ui);
    font-size: var(--font-size-base);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    line-height: 1.5;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 1px var(--color-accent-light);
}

.form-control:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.form-control::placeholder {
    color: var(--color-text-muted);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2394a3b8' d='M6 8.825a.5.5 0 0 1-.354-.146l-4-4a.5.5 0 0 1 .708-.708L6 7.617l3.646-3.646a.5.5 0 0 1 .708.708l-4 4A.5.5 0 0 1 6 8.825z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

textarea.form-control {
    resize: vertical;
    min-height: 80px;
}

.validation-message {
    color: var(--color-danger);
    font-size: var(--font-size-xs);
    margin-top: var(--spacing-xs);
}

/* ── Alerts ────────────────────────── */

.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-lg);
}

.alert-danger {
    background: var(--color-danger-light);
    color: #fca5a5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.alert-success {
    background: var(--color-success-light);
    color: #6ee7b7;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.alert-warning {
    background: var(--color-warning-light);
    color: #fcd34d;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

.alert-info {
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

/* ── Badges ────────────────────────── */

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.625rem;
    font-size: var(--font-size-xs);
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.badge-primary {
    background: var(--color-accent-light);
    color: var(--color-accent);
}

.badge-secondary {
    background: var(--color-surface);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.badge-success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.badge-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.badge-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.badge-muted {
    background: rgba(148, 163, 184, 0.15);
    color: var(--color-text-secondary);
}

/* ── Loading States ────────────────── */

.loading-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    color: var(--color-accent);
    font-size: var(--font-size-xl);
    font-family: var(--font-heading);
}

.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    padding: var(--spacing-3xl);
    color: var(--color-text-secondary);
}

.loading-spinner::before {
    content: '';
    width: 28px;
    height: 28px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

#blazor-error-ui {
    background: var(--color-danger);
    color: white;
    padding: var(--spacing-md);
    text-align: center;
    display: none;
    position: fixed;
    bottom: 0;
    width: 100%;
    z-index: 9999;
}

/* ── Empty States ───────────────────── */

.empty-state {
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    color: var(--color-text-secondary);
}

.empty-state p {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-lg);
}

/* ── Actions Container ──────────────── */

.actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

/* ── Pagination ─────────────────────── */

.pagination {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-xl);
}

/* ── HEADER ──────────────────────────── */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.header-inner {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: var(--font-size-lg);
    font-family: var(--font-heading);
    flex-shrink: 0;
}

.header-logo:hover {
    color: var(--color-text);
}

.logo-jp {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-accent);
    border-radius: var(--radius-sm);
    color: var(--color-bg);
    font-weight: 600;
    font-size: var(--font-size-xs);
    font-family: var(--font-heading);
}

.logo-text {
    font-size: var(--font-size-base);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.75rem;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.nav-link:hover {
    color: var(--color-text);
    background: var(--color-surface-hover);
}

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

.nav-divider {
    width: 1px;
    height: 20px;
    background: var(--color-border);
    margin: 0 var(--spacing-xs);
}

.mobile-menu-toggle {
    display: none;
    padding: var(--spacing-sm);
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    position: relative;
    transition: background var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--color-text);
    transition: transform var(--transition-fast);
}

.hamburger::before { top: -6px; }
.hamburger::after { bottom: -6px; }

.hamburger.open { background: transparent; }
.hamburger.open::before { transform: translateY(6px) rotate(45deg); }
.hamburger.open::after { transform: translateY(-6px) rotate(-45deg); }

/* ── FOOTER ─────────────────────────── */

.site-footer {
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-2xl) 0;
    margin-top: auto;
}

.footer-inner {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.footer-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-links a {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: var(--color-text);
}

.footer-sep {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

.footer-copyright {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* ── RESPONSIVE ──────────────────────── */

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.5rem;
        --spacing-2xl: 2rem;
        --spacing-3xl: 2.5rem;
    }

    /* Mobile menu */
    .mobile-menu-toggle {
        display: block;
    }

    .header-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-xl) var(--spacing-lg);
        gap: var(--spacing-sm);
        transform: translateX(100%);
        transition: transform var(--transition-normal);
        border-top: 1px solid var(--color-border);
        overflow-y: auto;
    }

    .header-nav.is-open {
        transform: translateX(0);
    }

    .nav-link {
        padding: var(--spacing-md);
        font-size: var(--font-size-base);
    }

    .nav-divider {
        width: 100%;
        height: 1px;
        margin: var(--spacing-sm) 0;
    }

    .logo-text {
        font-size: var(--font-size-sm);
    }
}