/* =====================================================
   DateRecurrenceR Demo — Terminal-Inspired Dark Theme
   ===================================================== */

@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
    --sidebar-width: 240px;
    --config-col-width: 420px;
    --bg-page: #0A0A0A;
    --bg-surface: #0F0F0F;
    --bg-card: #141414;
    --bg-active: #1F1F1F;
    --text-emphasis: #FFFFFF;
    --text-primary: #FAFAFA;
    --text-secondary: #6B7280;
    --text-tertiary: #4B5563;
    --accent-green: #10b981;
    --accent-cyan: #06B6D4;
    --accent-amber: #F59E0B;
    --border: #2a2a2a;
    --mobile-header-height: 52px;
}

/* Laptop */
@media (max-width: 1280px) {
    :root { --config-col-width: 360px; }
}
/* Tablet */
@media (max-width: 1024px) {
    :root { --config-col-width: 320px; }
}

* { box-sizing: border-box; }

html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    font-family: 'IBM Plex Mono', 'Consolas', monospace;
    background: var(--bg-page);
    color: var(--text-primary);
}

/* =====================================================
   App shell
   ===================================================== */

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

/* =====================================================
   Sidebar
   ===================================================== */

.sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    background: var(--bg-page);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    flex-shrink: 0;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 200;
    border-right: 1px solid var(--border);
    padding: 32px 24px;
    transition: transform 0.25s ease;
}

.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-page);
    min-width: 0;
}

/* =====================================================
   Sidebar content
   ===================================================== */

.sidebar-logo-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 32px;
}

.sidebar-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.sidebar-logo-prompt {
    font-family: 'JetBrains Mono', monospace;
    font-size: 20px;
    font-weight: 700;
    color: var(--accent-green);
}

.sidebar-logo-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

/* Close button — only visible on mobile/tablet */
.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 18px;
    cursor: pointer;
    padding: 4px 8px;
    line-height: 1;
}

.sidebar-top {
    display: flex;
    flex-direction: column;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-nav-link {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    color: var(--text-secondary);
    text-decoration: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 400;
    transition: background 0.15s, color 0.15s;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
}

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

.sidebar-nav-link.active {
    background: var(--bg-active);
    color: var(--text-primary);
}

.sidebar-nav-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--text-tertiary);
    flex-shrink: 0;
}

.sidebar-nav-link.active .sidebar-nav-dot {
    background: var(--accent-green);
}

.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 32px;
}

.sidebar-footer-version {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 11px;
    color: var(--text-tertiary);
}

.sidebar-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
}

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

/* =====================================================
   Mobile header bar (hidden on desktop)
   ===================================================== */

.mobile-header {
    display: none;
    align-items: center;
    gap: 12px;
    height: var(--mobile-header-height);
    padding: 0 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-page);
    position: sticky;
    top: 0;
    z-index: 100;
    flex-shrink: 0;
}

.mobile-logo {
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
}

.hamburger {
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex-shrink: 0;
}

.hamburger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    transition: transform 0.2s, opacity 0.2s;
}

/* Nav backdrop */
.nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 150;
}

/* =====================================================
   Page container
   ===================================================== */

.page-container {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* =====================================================
   Two-column page layout (config | results)
   ===================================================== */

.page-columns {
    display: flex;
    flex: 1;
    min-height: calc(100vh - var(--mobile-header-height));
}

.config-column {
    width: var(--config-col-width);
    min-width: var(--config-col-width);
    flex-shrink: 0;
    border-right: 1px solid var(--border);
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    overflow-y: auto;
}

.result-column {
    flex: 1;
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    gap: 28px;
    overflow-y: auto;
    min-width: 0;
}

/* Wide monitors — give result column more breathing room */
@media (min-width: 1600px) {
    :root { --config-col-width: 460px; }
    .result-column { padding: 40px 48px; }
}

@media (min-width: 1920px) {
    :root { --config-col-width: 500px; }
}

/* =====================================================
   Page header
   ===================================================== */

.page-header { margin-bottom: 8px; }

.page-prompt {
    font-family: 'JetBrains Mono', monospace;
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-green);
    margin: 0 0 8px;
}

.page-description {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.page-description code {
    color: var(--accent-cyan);
    background: none;
    font-family: 'JetBrains Mono', monospace;
}

/* =====================================================
   Config form
   ===================================================== */

.config-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
    border: 1px solid var(--border);
    padding: 18px;
    background: var(--bg-card);
}

.form-row {
    display: flex;
    gap: 16px;
}

.form-row > * { flex: 1; min-width: 0; }

/* =====================================================
   Panels (home page)
   ===================================================== */

.config-panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 24px;
}

.panel-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 500;
    color: var(--accent-green);
    margin: 0 0 16px;
}

/* =====================================================
   Result panel (inline, no tabs)
   ===================================================== */

.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

.result-header-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 400;
    color: var(--text-secondary);
}

.result-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--accent-green);
    white-space: nowrap;
}

.result-status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-green);
    flex-shrink: 0;
}

.result-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    color: var(--text-tertiary);
    gap: 12px;
    text-align: center;
}

.result-empty-icon { opacity: 0.4; }

.result-empty-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.result-columns {
    display: flex;
    gap: 32px;
    align-items: flex-start;
}

.result-date-list { flex: 1; min-width: 0; }

.result-calendar {
    width: 280px;
    flex-shrink: 0;
}

.result-snippet { margin-top: 4px; }

/* =====================================================
   Date list table
   ===================================================== */

.dates-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    font-family: 'JetBrains Mono', monospace;
}

.dates-table th {
    text-align: left;
    padding: 8px 12px;
    font-size: 11px;
    font-weight: 400;
    color: var(--text-tertiary);
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
}

.dates-table td {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border);
    color: var(--text-primary);
}

.dates-table tr:last-child td { border-bottom: none; }
.dates-table tbody tr { cursor: pointer; }
.dates-table tbody tr:hover td { background: var(--bg-active); }
.dates-table tbody tr.row-selected td { background: #1e2d26; }

.date-index { color: var(--text-tertiary); font-size: 12px; width: 48px; }
.date-value { font-family: 'JetBrains Mono', monospace; font-weight: 500; }
.date-dow { color: var(--text-secondary); }
.date-sources { white-space: nowrap; }

.pattern-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 3px;
    vertical-align: middle;
    flex-shrink: 0;
}
.pattern-dot-0 { background: var(--pattern-0); }
.pattern-dot-1 { background: var(--pattern-1); }
.pattern-dot-2 { background: var(--pattern-2); }
.pattern-dot-3 { background: var(--pattern-3); }
.pattern-dot-4 { background: var(--pattern-4); }

/* =====================================================
   Calendar
   ===================================================== */

.calendar-grid { width: 100%; }

.calendar-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
}

.calendar-month-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.calendar-days-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
    margin-bottom: 4px;
}

.calendar-day-name {
    text-align: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-tertiary);
    padding: 4px 0;
}

.calendar-weeks {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 2px;
}

.calendar-cell {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: default;
    font-weight: 400;
}

.calendar-cell.other-month { color: var(--text-tertiary); }
.calendar-cell.highlighted { background: var(--accent-green); color: var(--bg-page); font-weight: 700; }
.calendar-cell.today { border: 1.5px solid var(--accent-green); }
.calendar-cell.selected { outline: 2px solid #fff; outline-offset: -2px; z-index: 1; position: relative; }

/* Union pattern-colored calendar cells */
.calendar-cell.pattern-bg-0 { background: rgba(16,185,129,.28); color: #10b981; font-weight: 700; }
.calendar-cell.pattern-bg-1 { background: rgba(6,182,212,.28); color: #06B6D4; font-weight: 700; }
.calendar-cell.pattern-bg-2 { background: rgba(245,158,11,.28); color: #F59E0B; font-weight: 700; }
.calendar-cell.pattern-bg-3 { background: rgba(139,92,246,.28); color: #8B5CF6; font-weight: 700; }
.calendar-cell.pattern-bg-4 { background: rgba(244,63,94,.28); color: #F43F5E; font-weight: 700; }

.calendar-cell.highlighted-multi { background: var(--bg-card); font-weight: 700; display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 2px; }
.calendar-cell-dots { display: flex; gap: 2px; margin-top: 2px; }
.calendar-cell-dots .pattern-dot { width: 5px; height: 5px; margin: 0; }

/* =====================================================
   Code snippet
   ===================================================== */

.code-snippet-wrapper {
    position: relative;
    overflow: hidden;
    background: var(--bg-surface);
    border: 1px solid var(--border);
}

.code-snippet-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
}

.code-snippet-lang {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-tertiary);
}

.code-snippet-copy {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-secondary);
    background: none;
    border: 1px solid var(--border);
    padding: 3px 10px;
    cursor: pointer;
    transition: all 0.15s;
}

.code-snippet-copy:hover { background: var(--bg-active); color: var(--text-primary); }
.code-snippet-copy.copied { color: var(--accent-green); border-color: rgba(16,185,129,0.3); }

pre.code-block {
    margin: 0;
    padding: 16px;
    overflow-x: auto;
    font-size: 12px;
    line-height: 1.6;
    background: transparent !important;
}

pre.code-block code {
    background: transparent !important;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-primary);
}

/* =====================================================
   Mode tabs (Monthly/Yearly sub-modes)
   ===================================================== */

.mode-tabs {
    display: flex;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    padding: 4px;
    gap: 4px;
    flex-wrap: wrap;
}

.mode-tab {
    flex: 1;
    padding: 7px 10px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    font-weight: 400;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--text-secondary);
    transition: all 0.15s;
    text-align: center;
    white-space: nowrap;
}

.mode-tab.active { background: var(--bg-active); color: var(--text-primary); }

/* =====================================================
   Subrange toggle
   ===================================================== */

.subrange-mode-btns {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
}

/* =====================================================
   Warning / truncation banner
   ===================================================== */

.truncation-warning {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid rgba(245, 158, 11, 0.3);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--accent-amber);
    margin-bottom: 12px;
}

/* =====================================================
   Union page slots
   ===================================================== */

.union-slot {
    border: 1px solid var(--border);
    padding: 18px;
    background: var(--bg-card);
}

.union-slot-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.union-slot-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    font-weight: 500;
    color: var(--accent-green);
}

/* ── Pattern colors (Union slots 0–4) ── */
:root {
    --pattern-0: #10b981;
    --pattern-1: #06B6D4;
    --pattern-2: #F59E0B;
    --pattern-3: #8B5CF6;
    --pattern-4: #F43F5E;
}

.pattern-color-0 { color: var(--pattern-0) !important; }
.pattern-color-1 { color: var(--pattern-1) !important; }
.pattern-color-2 { color: var(--pattern-2) !important; }
.pattern-color-3 { color: var(--pattern-3) !important; }
.pattern-color-4 { color: var(--pattern-4) !important; }

/* =====================================================
   Pagination
   ===================================================== */

.pagination-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 12px;
    border-top: 1px solid var(--border);
    background: var(--bg-surface);
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--text-secondary);
}

/* =====================================================
   Generate button
   ===================================================== */

.btn-generate {
    width: 100%;
    padding: 12px;
    background: var(--accent-green);
    color: var(--bg-page);
    border: none;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: opacity 0.15s;
    text-align: center;
    margin-top: auto;
}

.btn-generate:hover { opacity: 0.9; }

/* =====================================================
   Home page
   ===================================================== */

.home-page { padding: 40px; }

.home-hero {
    padding: 24px 0 32px;
    margin-bottom: 32px;
}

.home-hero-prompt {
    font-family: 'JetBrains Mono', monospace;
    font-size: 28px;
    font-weight: 700;
    color: var(--accent-green);
    margin: 0 0 8px;
}

.home-hero-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 12px;
}

.home-hero-subtitle {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
    max-width: 600px;
}

.home-section-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.home-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
    margin-bottom: 40px;
}

.home-feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 20px;
    text-decoration: none;
    color: inherit;
    transition: border-color 0.2s, background 0.2s;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.home-feature-card:hover { border-color: var(--accent-green); background: var(--bg-active); }

.home-feature-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
}

.home-feature-title::before { content: '$ '; color: var(--accent-green); }

.home-feature-desc {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.home-feature-link {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--accent-green);
}

.highlight-box { background: var(--bg-card); border: 1px solid var(--border); padding: 20px; }

.highlight-box-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-green);
    margin-bottom: 8px;
}

.highlight-box-desc {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* =====================================================
   MudBlazor overrides
   ===================================================== */

.mud-input-label {
    font-family: 'JetBrains Mono', monospace !important;
    font-size: 11px !important;
    color: var(--text-secondary) !important;
}

.mud-input,
.mud-input-text,
.mud-input > input,
.mud-select .mud-input-slot {
    font-family: 'JetBrains Mono', monospace !important;
    font-size: 13px !important;
    color: var(--text-primary) !important;
}

.mud-input-outlined .mud-input-outlined-border {
    border-color: var(--border) !important;
}

.mud-tab {
    font-family: 'JetBrains Mono', monospace !important;
    font-size: 12px !important;
}

.mud-chip { font-family: 'JetBrains Mono', monospace !important; }

/* =====================================================
   Blazor error UI
   ===================================================== */

#blazor-error-ui {
    background: var(--bg-card);
    bottom: 0;
    box-shadow: 0 -1px 2px rgba(0,0,0,0.5);
    display: none;
    left: 0;
    padding: 0.6rem 1.25rem 0.7rem;
    position: fixed;
    width: 100%;
    z-index: 1000;
    color: var(--accent-amber);
    font-family: 'JetBrains Mono', monospace;
}

#blazor-error-ui .dismiss { cursor: pointer; position: absolute; right: 0.75rem; top: 0.5rem; }

/* =====================================================
   RESPONSIVE BREAKPOINTS
   ===================================================== */

/* --- Constrain date table on very wide screens --- */
@media (min-width: 1600px) {
    .result-date-list { max-width: 560px; }
}

/* --- Tablet & below (≤ 1024px): drawer sidebar --- */
@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        box-shadow: none;
    }

    .sidebar-close { display: block; }

    .nav-backdrop { display: block; opacity: 0; pointer-events: none; transition: opacity 0.25s; }

    .app-layout.nav-open .sidebar { transform: translateX(0); box-shadow: 4px 0 24px rgba(0,0,0,0.5); }
    .app-layout.nav-open .nav-backdrop { opacity: 1; pointer-events: auto; }

    .mobile-header { display: flex; }

    .main-content {
        margin-left: 0;
    }

    .page-columns { min-height: calc(100vh - var(--mobile-header-height)); }

    /* Stack date pickers vertically — config column too narrow for side-by-side */
    .form-row { flex-direction: column; gap: 0; }
}

/* --- Small tablet (≤ 768px): narrower config column --- */
@media (max-width: 768px) {
    .result-columns { flex-direction: column; }
    .result-calendar { width: 100%; }

    .config-column { padding: 24px 20px; }
    .result-column { padding: 24px 20px; }
}

/* --- Mobile (≤ 640px): stacked layout --- */
@media (max-width: 640px) {
    :root { --config-col-width: 100%; }

    .page-columns { flex-direction: column; }

    .config-column {
        width: 100%;
        min-width: 0;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 20px 16px;
    }

    .result-column { padding: 20px 16px; }

    .form-row { flex-direction: column; gap: 0; }

    .home-page { padding: 20px 16px; }

    .home-hero-prompt { font-size: 22px; }
    .home-hero-title { font-size: 18px; }
    .home-features-grid { grid-template-columns: 1fr 1fr; gap: 10px; }

    .page-prompt { font-size: 22px; }
}

/* --- Very small (≤ 400px): single column feature cards --- */
@media (max-width: 400px) {
    .home-features-grid { grid-template-columns: 1fr; }
}