/* ======================================
   aniXiv Common Design System
   ====================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Noto+Serif+JP:wght@400;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Color palette (Light Mode Default) */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #f1f3f5;
    --bg-elevated: #ffffff;
    --bg-hover: #e9ecef;

    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #868e96;
    --text-accent: #7c3aed;

    --accent-primary: #7c3aed;
    --accent-secondary: #8b5cf6;
    --accent-glow: rgba(124, 58, 237, 0.15);
    --accent-gradient: linear-gradient(135deg, #7c3aed 0%, #a78bfa 100%);

    --border-subtle: #dee2e6;
    --border-active: rgba(124, 58, 237, 0.4);

    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;

    /* Typography */
    --font-ui: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Noto Serif JP', 'Times New Roman', serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;

    /* Spacing */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;

    /* Transitions */
    --transition-fast: 120ms ease;
    --transition-normal: 200ms ease;
    --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #0f0f14;
    --bg-secondary: #161620;
    --bg-tertiary: #1e1e2e;
    --bg-elevated: #252538;
    --bg-hover: #2a2a40;

    --text-primary: #e8e6f0;
    --text-secondary: #b6b3c4;
    --text-muted: #9491a6;
    --text-accent: #a78bfa;

    --accent-glow: rgba(124, 58, 237, 0.25);
    --border-subtle: rgba(255, 255, 255, 0.06);
}

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

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

body {
    font-family: var(--font-ui);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ======================================
   App Layout
   ====================================== */
.app-shell {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 58px;
    border-bottom: 1px solid var(--border-subtle);
    background: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header__brand {
    display: flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.app-header__logo {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.app-header__actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.app-header__nav {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
    margin-right: 10px;
}

.app-header__nav a {
    display: inline-flex;
    align-items: center;
    min-height: 34px;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    white-space: nowrap;
}

.app-header__nav a:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.app-header .breadcrumbs {
    padding: 0;
    flex-wrap: nowrap;
}

.app-body {
    display: grid;
    grid-template-columns: 240px 1fr;
    flex: 1;
    min-height: 0;
}

.app-sidebar {
    position: sticky;
    top: 58px;
    height: calc(100vh - 58px);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-subtle);
    padding: 20px 0;
    overflow-y: auto;
}

.app-main {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px;
}

.app-main--wide {
    max-width: none;
    margin: 0;
}

.section-title {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
}

.section-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
}

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

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

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}

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

/* Common utility classes */
.glass {
    background: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-subtle);
}

[data-theme="dark"] .glass {
    background: rgba(30, 30, 46, 0.6);
}

.glow-border {
    border: 1px solid var(--border-active);
    box-shadow: 0 0 20px var(--accent-glow), inset 0 0 20px rgba(124, 58, 237, 0.05);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 2px 10px;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.02em;
}

.badge--accent {
    background: rgba(124, 58, 237, 0.15);
    color: var(--accent-secondary);
    border: 1px solid rgba(124, 58, 237, 0.3);
}

.badge--success {
    background: rgba(52, 211, 153, 0.12);
    color: var(--success);
    border: 1px solid rgba(52, 211, 153, 0.3);
}

/* Button */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-ui);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn--primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 2px 12px var(--accent-glow);
}

.btn--primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

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

.btn--ghost:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--border-active);
}

/* Icons */
.icon {
    width: 1.1em;
    height: 1.1em;
    vertical-align: -0.125em;
    pointer-events: none;
}

[data-theme="dark"] img.icon {
    filter: invert(1) brightness(2);
}

/* Icons inside inverted-color containers (.home-actions .btn--primary)
   need special treatment because bg = var(--text-primary):
   Light mode: dark bg -> icons need invert to white
   Dark mode:  light bg -> icons must NOT invert */
.home-actions .btn--primary img.icon {
    filter: invert(1) brightness(2);
}
[data-theme="dark"] .home-actions .btn--primary img.icon {
    filter: none;
}

/* Auth UI */
.auth-login-container {
    display: inline-flex;
    align-items: center;
}

.auth-user-container {
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
}

.auth-menu {
    position: relative;
}

.auth-menu__trigger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    border-radius: 999px;
    border: 1px solid var(--border-subtle);
    background: var(--bg-primary);
    color: var(--text-secondary);
    text-decoration: none;
    cursor: pointer;
    font: inherit;
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.auth-menu__trigger:hover,
.auth-menu__trigger[aria-expanded="true"] {
    background: var(--bg-hover);
    border-color: var(--border-active);
    color: var(--text-primary);
}

.auth-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--accent-primary);
    object-fit: cover;
}

.auth-user-name {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--text-secondary);
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.auth-menu__trigger .auth-user-name {
    color: inherit;
    max-width: 140px;
}

.auth-menu__caret {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.auth-menu__panel {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    padding: 8px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
    z-index: 300;
}

.auth-menu__panel[hidden] {
    display: none;
}

.auth-menu__item {
    display: flex;
    width: 100%;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    background: transparent;
    border: none;
    text-decoration: none;
    font: inherit;
    cursor: pointer;
    text-align: left;
}

.auth-menu__item:hover {
    background: var(--bg-hover);
}

.auth-menu__item--danger {
    color: var(--error);
}

.onboarding-backdrop {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: grid;
    place-items: center;
    padding: 24px;
    background: rgba(8, 8, 12, 0.58);
}

.onboarding-backdrop[hidden] {
    display: none;
}

.has-onboarding-modal {
    overflow: hidden;
}

.onboarding-dialog {
    width: min(680px, 100%);
    max-height: min(760px, calc(100vh - 48px));
    overflow-y: auto;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.28);
}

.onboarding-dialog__header {
    padding: 24px 24px 16px;
    border-bottom: 1px solid var(--border-subtle);
}

.onboarding-dialog__header h2 {
    margin-top: 8px;
    font-family: var(--font-serif);
    font-size: 1.35rem;
}

.onboarding-dialog__header p:last-child {
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.onboarding-form {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 20px 24px 24px;
}

.onboarding-form__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 180px;
    gap: 12px;
}

.onboarding-field {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.onboarding-field span,
.onboarding-check span {
    color: var(--text-primary);
    font-size: 0.84rem;
    font-weight: 600;
}

.onboarding-field input,
.onboarding-field textarea,
.onboarding-field select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: var(--font-ui);
    font-size: 0.9rem;
}

.onboarding-field input:focus,
.onboarding-field textarea:focus,
.onboarding-field select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.onboarding-field small {
    color: var(--text-muted);
    font-size: 0.76rem;
}

.onboarding-check {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
}

.onboarding-check input {
    margin-top: 4px;
}

.onboarding-status {
    min-height: 20px;
    color: var(--text-muted);
    font-size: 0.84rem;
}

.onboarding-status--error {
    color: var(--error);
}

.onboarding-submit {
    justify-content: center;
}

.auth-logout-btn {
    font-size: 0.75rem;
    padding: 4px 10px;
}

.header-notifications {
    position: relative;
}

.header-notifications__trigger {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border: 1px solid var(--border-subtle);
    border-radius: 999px;
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
}

.header-notifications__trigger:hover,
.header-notifications__trigger[aria-expanded="true"] {
    background: var(--bg-hover);
    border-color: var(--border-active);
    color: var(--text-primary);
}

.header-notifications__trigger--active {
    color: var(--accent-secondary);
}

.header-notifications__icon {
    display: inline-flex;
    width: 18px;
    height: 18px;
}

.header-notifications__icon svg {
    width: 100%;
    height: 100%;
}

.header-notifications__badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    border-radius: 999px;
    background: var(--accent-primary);
    color: #fff;
    font-size: 0.68rem;
    font-weight: 700;
    line-height: 18px;
    box-shadow: 0 0 0 2px var(--bg-secondary);
}

.header-notifications__panel {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: min(360px, calc(100vw - 24px));
    padding: 10px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    background: var(--bg-elevated);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.12);
    z-index: 320;
}

.header-notifications__panel[hidden] {
    display: none;
}

.header-notifications__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    padding: 4px 4px 10px;
}

.header-notifications__title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

.header-notifications__subtitle {
    font-size: 0.76rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.header-notifications__action,
.header-notifications__footer {
    color: var(--accent-secondary);
    font-size: 0.78rem;
    font-weight: 600;
    background: transparent;
    border: none;
    cursor: pointer;
    text-decoration: none;
}

.header-notifications__action:disabled {
    color: var(--text-muted);
    cursor: default;
}

.header-notifications__list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 360px;
    overflow-y: auto;
}

.header-notifications__item {
    display: block;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-subtle);
    background: var(--bg-primary);
    color: inherit;
    text-decoration: none;
    transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.header-notifications__item:hover {
    background: var(--bg-hover);
    border-color: var(--border-active);
    transform: translateY(-1px);
}

.header-notifications__item--unread {
    border-color: rgba(124, 58, 237, 0.3);
    box-shadow: inset 3px 0 0 var(--accent-primary);
}

.header-notifications__item-main {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.header-notifications__item-topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.header-notifications__meta,
.header-notifications__date {
    font-size: 0.72rem;
    color: var(--text-muted);
}

.header-notifications__item-title {
    font-size: 0.84rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-notifications__item-body {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.45;
}

.header-notifications__empty {
    padding: 18px 12px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.header-notifications__footer {
    display: flex;
    justify-content: flex-end;
    padding: 10px 4px 2px;
}

/* ======================================
   Breadcrumbs
   ====================================== */
.breadcrumbs {
    display: flex;
    align-items: center;
    gap: 0;
    font-size: 0.82rem;
    color: var(--text-muted);
    padding: 12px 0 0;
    list-style: none;
    flex-wrap: wrap;
}

.breadcrumbs__item {
    display: inline-flex;
    align-items: center;
}

.breadcrumbs__item + .breadcrumbs__item::before {
    content: '/';
    margin: 0 8px;
    color: var(--text-muted);
    opacity: 0.5;
    font-size: 0.75rem;
}

.breadcrumbs__link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
    font-weight: 500;
}

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

.breadcrumbs__current {
    color: var(--text-primary);
    font-weight: 600;
}

/* ======================================
   Sidebar Navigation
   ====================================== */
.sidebar-section {
    margin-bottom: 24px;
}

.sidebar-section__title {
    padding: 0 20px;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav__item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 20px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-left: 2px solid transparent;
}

.sidebar-nav__item a {
    color: inherit;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
}

.sidebar-nav__item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.sidebar-nav__item.active {
    background: rgba(124, 58, 237, 0.08);
    color: var(--accent-secondary);
    border-left-color: var(--accent-primary);
}

/* ======================================
   Navigation Cards (MyPage Hub)
   ====================================== */
.nav-cards {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-top: 8px;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--bg-primary);
}

.nav-card {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 16px 18px;
    border-bottom: 1px solid var(--border-subtle);
    text-decoration: none;
    color: inherit;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.nav-card:hover {
    background: var(--bg-hover);
}

.nav-card:last-child {
    border-bottom: none;
}

.nav-card__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-card__title {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-card__count {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.nav-card__desc {
    font-size: 0.82rem;
    color: var(--text-muted);
    line-height: 1.5;
}

.nav-card__arrow {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 4px;
    margin-top: 4px;
    transition: color var(--transition-fast);
}
.nav-card:hover .nav-card__arrow {
    color: var(--text-primary);
}

/* ======================================
   Page Header (section title + breadcrumbs)
   ====================================== */
.page-header {
    margin-bottom: 24px;
}

.page-header__title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 8px;
}

.page-header__actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
}

.dashboard-back-link {
    display: flex;
    align-items: center;
    width: fit-content;
    margin-bottom: 8px;
    color: var(--text-secondary);
    font-size: 0.84rem;
    font-weight: 600;
    text-decoration: none;
    transition: color var(--transition-fast), transform var(--transition-fast);
}

.dashboard-back-link:hover {
    color: var(--accent-primary);
    transform: translateX(-2px);
}

/* ======================================
   Responsive (Small Screens)
   ====================================== */
img {
    max-width: 100%;
    height: auto;
}

@media (max-width: 480px) {
    html { font-size: 14px; }
    
    .btn { padding: 6px 12px; font-size: 0.8rem; }
    
    .auth-user-container { flex-wrap: wrap; justify-content: flex-end; }
    .auth-user-name { max-width: 80px; }
}

@media (max-width: 900px) {
    .app-body {
        grid-template-columns: 1fr;
    }

    .app-sidebar {
        position: static;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-subtle);
    }
}

@media (max-width: 640px) {
    .app-header {
        height: auto;
        padding: 8px 16px;
        flex-wrap: wrap;
        gap: 8px;
    }

    .app-header__brand {
        flex-wrap: wrap;
    }

    .app-header__actions {
        width: 100%;
        justify-content: flex-start;
    }

    .app-header__nav {
        order: 3;
        width: 100%;
        margin: 0;
        overflow-x: auto;
        padding-bottom: 2px;
    }

    .auth-user-container {
        flex-wrap: wrap;
    }

    .auth-menu__panel {
        right: auto;
        left: 0;
        min-width: 210px;
    }

    .header-notifications__panel {
        right: auto;
        left: 0;
        width: min(360px, calc(100vw - 32px));
    }

    .onboarding-form__grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 360px) {
    .auth-user-name { display: none; /* Hide name to save space on extremely small screens */ }
    .btn { padding: 4px 8px; font-size: 0.75rem; }
}