:root {
    --bg-color: #0e0f11;
    --sidebar-bg: #17181b;
    --card-bg: #212328;
    --card-hover: #292c32;
    --text-primary: #f4f4f5;
    --text-secondary: #8f9098;
    --accent-color: #5e6ad2;
    --accent-hover: #6b78e6;
    --border-color: #27282b;
    --column-bg: #121315;
    --danger-color: #e5484d;
    --priority-high: #e5484d;
    --priority-medium: #f5a623;
    --priority-low: #3e81f4;

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* Sidebar */
.sidebar {
    width: 250px;
    /* Küçültüldü */
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    z-index: 10;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
}

/* Sidebar footer (user + logout) — hidden on desktop, shown in sidebar on mobile */
.sidebar-footer {
    margin-top: auto;
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: none;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.sidebar-header {
    padding: 20px 20px 12px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 8px;
}

.task-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 20px 12px;
}

.task-section-header h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 600;
}

.badge {
    background-color: var(--border-color);
    color: var(--text-secondary);
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 12px;
    font-weight: 600;
}

.add-task-container {
    padding: 0 20px 16px;
    display: flex;
    gap: 6px;
}

.add-task-container input {
    flex-grow: 1;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.8rem;
    outline: none;
    transition: all 0.2s ease;
    width: 100%;
}

.add-task-container input::placeholder {
    color: #5f636c;
}

.add-task-container input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(94, 106, 210, 0.2);
    background-color: #1a1c20;
}

.add-task-container button {
    background-color: var(--accent-color);
    color: white;
    border: none;
    width: 36px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.add-task-container button:hover {
    background-color: var(--accent-hover);
}

.add-task-container button:active {
    transform: scale(0.95);
}

/* Lists */
.task-list {
    flex-grow: 1;
    overflow-y: auto;
    padding: 8px 16px 20px;
    min-height: 120px;
}

/* Task Cards */
.task-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
    margin-bottom: 8px;
    cursor: grab;
    box-shadow: var(--shadow-sm);
    transition: transform 0.15s, box-shadow 0.15s, background-color 0.15s, border-color 0.15s;
    position: relative;
    display: flex;
    align-items: center;
    gap: 8px;
    animation: fadeIn 0.3s ease;
}

.task-card:active {
    cursor: grabbing;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.task-card:hover {
    background-color: var(--card-hover);
    border-color: #3b3d44;
    box-shadow: var(--shadow-md);
}

.drag-handle {
    display: none;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    cursor: grab;
    padding: 2px 4px;
    opacity: 0.25;
    transition: opacity 0.2s, color 0.2s;
    user-select: none;
    -webkit-user-select: none;
}

.drag-handle:hover {
    opacity: 0.8;
    color: var(--accent-color);
}

.drag-handle:active {
    cursor: grabbing;
}

/* Touch devices (Mobile & Tablet): show handle, default cursor on card */
@media (pointer: coarse) {
    .drag-handle {
        display: flex;
    }
    .task-card {
        cursor: default;
    }
    .task-card:active {
        cursor: default;
    }
}

.task-content {
    font-size: 0.8rem;
    line-height: 1.4;
    word-break: break-word;
    color: #e4e4e7;
    flex-grow: 1;
}

/* SortableJS Classes */
.sortable-ghost {
    opacity: 0.3;
    background-color: var(--bg-color);
    border: 2px dashed var(--accent-color);
}

.sortable-drag {
    box-shadow: var(--shadow-lg) !important;
    transform: rotate(2deg) scale(1.02);
    cursor: grabbing !important;
    z-index: 100;
}

/* Trash Zone Icon */
.trash-zone-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    border: 1px dashed transparent;
    transition: all 0.2s;
}

.trash-zone-icon svg {
    pointer-events: none;
}

.trash-zone-icon.sortable-dragenter,
.trash-zone-icon:hover {
    color: var(--danger-color);
    background-color: rgba(229, 72, 77, 0.1);
}

.trash-zone-icon.highlight {
    border-color: var(--danger-color);
    color: var(--danger-color);
}

.trash-zone-icon .task-card {
    display: none !important;
}

/* Board Area */
.board {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
}

/* Subtle background gradient for depth */
.board::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at top right, rgba(94, 106, 210, 0.05), transparent 40%),
        radial-gradient(circle at bottom left, rgba(94, 106, 210, 0.02), transparent 40%);
    pointer-events: none;
    z-index: 0;
}

.board-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
    background-color: rgba(14, 15, 17, 0.8);
    backdrop-filter: blur(12px);
}

.board-header-title {
    display: flex;
    align-items: center;
    gap: 16px;
}

.board-header h1 {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.week-navigation {
    display: flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(255, 255, 255, 0.03);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    user-select: none;
    -webkit-user-select: none;
}

#current-week-display {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-primary);
    min-width: 220px;
    text-align: center;
    display: inline-block;
    flex-shrink: 0;
    white-space: nowrap;
}

.btn-icon {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.2s;
}

.btn-icon:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-sm {
    padding: 4px 8px;
    font-size: 0.75rem;
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.btn-outline:hover {
    color: var(--text-primary);
    border-color: #4a4d57;
    background-color: rgba(255, 255, 255, 0.05);
}

.days-container-wrapper {
    flex-grow: 1;
    overflow: hidden;
    /* Prevent scrolling, handle in container */
    position: relative;
    z-index: 1;
}

.days-container {
    display: flex;
    height: 100%;
    padding: 16px;
    gap: 12px;
    align-items: stretch;
    width: 100%;
}

.day-column {
    background-color: rgba(18, 19, 21, 0.6);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    flex: 1;
    /* Automatically split available width */
    min-width: 0;
    /* Important for flex items to shrink below content size if necessary */
    display: flex;
    flex-direction: column;
    backdrop-filter: blur(8px);
    transition: border-color 0.2s;
}

.day-column:hover {
    border-color: #353841;
}

.day-column.weekend {
    background-color: rgba(18, 19, 21, 0.3);
}

.day-column.weekend .day-title {
    color: #6c707d;
}

.day-column.today {
    border-color: rgba(94, 106, 210, 0.5);
    background-color: rgba(94, 106, 210, 0.05);
}

.day-column.today .day-title {
    color: var(--accent-color);
}

.day-header {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.day-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.01em;
    display: flex;
    flex-direction: column;
    /* Stack day and date */
    gap: 4px;
}

.day-date {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.2);
    padding: 2px 6px;
    border-radius: 4px;
    align-self: flex-start;
}

.day-column .task-list {
    padding: 10px;
    flex-grow: 1;
    overflow-y: auto;
}

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

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

::-webkit-scrollbar-thumb {
    background: #31353f;
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: #464b59;
}

/* Done State */
.task-card.done .task-content {
    text-decoration: line-through;
    opacity: 0.5;
}

.task-card.done {
    background-color: rgba(33, 35, 40, 0.5);
    border-color: rgba(39, 40, 43, 0.5);
}

.task-checkbox {
    width: 16px;
    height: 16px;
    min-width: 16px;
    min-height: 16px;
    max-width: 16px;
    max-height: 16px;
    border-radius: 50%;
    border: 1px solid var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s;
    background: transparent;
    aspect-ratio: 1 / 1;
}

.task-checkbox:hover {
    border-color: var(--accent-color);
}

.task-card.done .task-checkbox {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.task-card.done .task-checkbox::after {
    content: '';
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-top: -2px;
}

/* Inline Edit */
.inline-edit-input {
    width: 100%;
    background: #1a1c20;
    border: 1px solid var(--accent-color);
    color: var(--text-primary);
    border-radius: 4px;
    padding: 2px 6px;
    font-size: 0.8rem;
    font-family: inherit;
    outline: none;
}

/* Side Panel */
.panel-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
}

.panel-overlay.active {
    opacity: 1;
    visibility: visible;
}

.side-panel {
    position: fixed;
    top: 0;
    right: -400px;
    width: 380px;
    height: 100vh;
    background-color: var(--sidebar-bg);
    border-left: 1px solid var(--border-color);
    z-index: 101;
    display: flex;
    flex-direction: column;
    transition: right 0.3s cubic-bezier(0.2, 0, 0, 1);
    box-shadow: -4px 0 24px rgba(0, 0, 0, 0.5);
}

.side-panel.active {
    right: 0;
}

.side-panel-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-task-title-input {
    flex-grow: 1;
    margin-right: 16px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1.1rem;
    font-weight: 600;
    font-family: inherit;
    padding: 6px 10px;
    margin-left: -10px;
    outline: none;
    transition: all 0.2s;
    min-width: 0;
}

.panel-task-title-input:hover {
    background-color: rgba(255, 255, 255, 0.03);
    border-color: var(--border-color);
}

.panel-task-title-input:focus {
    background-color: var(--bg-color);
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(94, 106, 210, 0.2);
}

.close-panel {
    font-size: 1.5rem;
    padding: 4px;
}

.side-panel-content {
    padding: 24px;
    flex-grow: 1;
    overflow-y: auto;
}

.form-group {
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.form-group textarea {
    width: 100%;
    min-height: 150px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    padding: 12px;
    font-family: inherit;
    font-size: 0.85rem;
    resize: vertical;
    outline: none;
    line-height: 1.5;
}

.form-group textarea:focus {
    border-color: var(--accent-color);
}

.panel-hint {
    font-size: 0.8rem;
    color: #5f636c;
    background: rgba(255, 255, 255, 0.03);
    padding: 12px;
    border-radius: var(--radius-sm);
    line-height: 1.4;
    border-left: 3px solid var(--accent-color);
}

/* ─────────────────────────────────────────────────────
   Hamburger & Sidebar Close — Hidden on Desktop
───────────────────────────────────────────────────── */
.hamburger-btn,
.sidebar-close-btn {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    min-width: 36px;
    min-height: 36px;
}

.hamburger-btn:hover,
.sidebar-close-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

/* Sidebar Overlay */
.sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(2px);
    z-index: 149;
    opacity: 0;
    transition: opacity 0.3s;
}

.sidebar-overlay.active {
    opacity: 1;
}

/* ─────────────────────────────────────────────────────
   Responsive — Tablet (max-width: 1200px)
───────────────────────────────────────────────────── */
@media (max-width: 1200px) {
    .days-container {
        overflow-x: auto;
    }

    .day-column {
        flex: none;
        width: calc(100% / 5);
        min-width: 180px;
    }
}

/* ─────────────────────────────────────────────────────
   Responsive — Small Tablet (max-width: 900px)
───────────────────────────────────────────────────── */
@media (max-width: 900px) {
    .app-container {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: 35vh;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }

    .board {
        height: 65vh;
    }
}

/* ─────────────────────────────────────────────────────
   Responsive — Mobile (max-width: 640px)
───────────────────────────────────────────────────── */
@media (max-width: 640px) {
    /* Prevent iOS auto-zoom on input/textarea focus */
    .add-task-container input,
    .form-group textarea,
    .inline-edit-input,
    .auth-form-group input {
        font-size: 16px !important;
    }

    /* === Layout === */
    .app-container {
        flex-direction: row;
    }

    /* === Hamburger Button === */
    .hamburger-btn {
        display: flex;
        flex-shrink: 0;
    }

    /* === Sidebar as left overlay panel === */
    .sidebar {
        position: fixed;
        left: -100%;
        top: 0;
        height: 100vh;
        width: 65%;
        max-width: 260px;
        border-right: 1px solid var(--border-color);
        border-bottom: none;
        z-index: 150;
        transition: left 0.3s cubic-bezier(0.2, 0, 0, 1);
        box-shadow: none;
    }

    .sidebar.open {
        left: 0;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.5);
    }

    .sidebar-overlay {
        display: block;
        pointer-events: none;
    }

    .sidebar-overlay.active {
        pointer-events: auto;
    }

    body.sortable-dragging .sidebar-overlay {
        pointer-events: none !important;
    }

    .sidebar-close-btn {
        display: flex;
    }

    .sidebar-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    /* === Board takes full width === */
    .board {
        height: 100vh;
        width: 100%;
    }

    /* === Header — Single compact row === */
    .board-header {
        flex-direction: row;
        align-items: center;
        gap: 8px;
        padding: 10px 12px;
    }

    .board-header-title {
        flex: 1;
        gap: 6px;
        min-width: 0;
    }

    /* On mobile: hide user info in board-actions (it's in sidebar-footer instead).
       Keep board-actions visible so trash-zone remains accessible. */
    .board-actions .user-info {
        display: none;
    }

    /* Trash right-aligned stays in board-actions */
    #trash-zone {
        flex-shrink: 0;
    }

    /* User email hidden on mobile */
    .user-email-display {
        display: none;
    }

    /* Show sidebar footer on mobile */
    .sidebar-footer {
        display: flex;
    }

    /* === Week Navigation === */
    .week-navigation {
        flex: 0 0 auto;
        padding: 3px 6px;
    }

    #current-week-display {
        min-width: 0;
        flex: 1;
        font-size: 0.78rem;
        text-align: center;
    }

    .board-header-title .view-toggle {
        flex-shrink: 0;
        margin-left: 0;
    }

    .view-toggle .view-toggle-btn {
        padding: 5px 10px;
        font-size: 0.75rem;
    }

    .hamburger-btn {
        flex-shrink: 0;
    }

    /* Hide Bu Hafta on very small screens to save space */
    #today-btn {
        display: none;
    }

    /* === Weekly View — Single Day Mode === */
    /* All day columns hidden by default; JS adds .mobile-active class */
    .mobile-week-view .day-column {
        display: none;
        flex: none;
        width: 100%;
        min-width: 0;
    }

    .mobile-week-view .day-column.mobile-active {
        display: flex;
    }

    .days-container.mobile-week-view {
        overflow-x: hidden;
    }

    /* === Monthly View — Compact === */
    .month-day-cell {
        min-height: 60px;
        padding: 4px;
    }

    .month-day-number {
        font-size: 0.65rem;
    }

    /* Show task count pill instead of cards */
    .month-day-cell .task-card {
        display: none;
    }

    .month-task-count {
        font-size: 0.6rem;
        background: var(--accent-color);
        color: white;
        border-radius: 10px;
        padding: 1px 5px;
        font-weight: 600;
        line-height: 1.4;
        display: inline-block;
    }

    .month-grid {
        grid-template-rows: repeat(6, minmax(60px, auto));
        gap: 4px;
    }

    .month-grid-header {
        gap: 4px;
        font-size: 0.65rem;
    }

    /* === Side Panel — Full Width === */
    .side-panel {
        width: 100%;
        right: -100%;
    }

    .side-panel.active {
        right: 0;
    }

    /* === Touch Targets === */
    .btn-icon,
    .btn-outline,
    .btn-logout,
    .view-toggle-btn,
    .add-task-container button {
        min-height: 40px;
    }

    .task-card {
        padding: 12px;
    }
}


/* ─────────────────────────────────────────────────────
   Auth Overlay
───────────────────────────────────────────────────── */
.auth-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1500;
    padding: 20px;
}

.auth-card {
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 36px 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(94, 106, 210, 0.1);
    animation: authSlideIn 0.35s cubic-bezier(0.2, 0, 0, 1);
}

@keyframes authSlideIn {
    from {
        opacity: 0;
        transform: translateY(16px) scale(0.98);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.auth-logo {
    font-size: 26px;
    font-weight: 700;
    color: var(--accent-color);
    text-align: center;
    letter-spacing: -0.5px;
    margin-bottom: 6px;
}

.auth-tagline {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.auth-tabs {
    display: flex;
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    padding: 3px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: 7px 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 500;
    font-family: inherit;
    transition: all 0.2s;
}

.auth-tab.active {
    background: var(--card-bg);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.auth-form-group {
    margin-bottom: 14px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.auth-form-group label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.02em;
}

.auth-form-group input {
    width: 100%;
    padding: 10px 14px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.85rem;
    font-family: inherit;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}

.auth-form-group input:focus {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(94, 106, 210, 0.2);
}

.auth-form-group input::placeholder {
    color: #5f636c;
}

.auth-message {
    font-size: 0.8rem;
    min-height: 20px;
    margin-bottom: 10px;
    padding: 0 2px;
    line-height: 1.4;
}

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

.auth-message.success {
    color: #4ade80;
}

.auth-submit-btn {
    width: 100%;
    padding: 11px;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: background-color 0.2s, opacity 0.2s, transform 0.1s;
    margin-top: 4px;
}

.auth-submit-btn:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

.auth-submit-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.auth-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* ─────────────────────────────────────────────────────
   Board Actions & User Info
───────────────────────────────────────────────────── */
.board-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-email-display {
    font-size: 0.75rem;
    color: var(--text-secondary);
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.btn-logout {
    padding: 5px 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.btn-logout:hover {
    border-color: var(--danger-color);
    color: var(--danger-color);
    background: rgba(229, 72, 77, 0.08);
}

/* ─────────────────────────────────────────────────────
   View Toggle Switcher
───────────────────────────────────────────────────── */
.view-toggle {
    display: flex;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 2px;
    margin-left: 8px;
}

.view-toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 4px 10px;
    font-size: 0.75rem;
    font-weight: 500;
    font-family: inherit;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.view-toggle-btn:hover {
    color: var(--text-primary);
}

.view-toggle-btn.active {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

/* ─────────────────────────────────────────────────────
   Monthly Calendar View
───────────────────────────────────────────────────── */
.month-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 16px;
    gap: 8px;
    overflow: hidden;
}

.month-grid-header {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
    text-align: center;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    font-weight: 600;
    padding-bottom: 4px;
}

.month-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    grid-template-rows: repeat(6, minmax(120px, 1fr));
    gap: 8px;
    flex-grow: 1;
    min-height: 0;
}

.month-day-cell {
    background-color: rgba(18, 19, 21, 0.4);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 6px;
    display: flex;
    flex-direction: column;
    min-height: 120px;
    transition: border-color 0.2s, background-color 0.2s;
}

.month-day-cell:hover {
    border-color: #353841;
}

.month-day-cell.other-month {
    opacity: 0.3;
}

.month-day-cell.today {
    border-color: rgba(94, 106, 210, 0.4);
    background-color: rgba(94, 106, 210, 0.04);
}

.month-day-number {
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 2px;
    color: var(--text-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.month-day-cell.today .month-day-number {
    color: var(--accent-color);
}

.month-day-cell .task-list {
    flex-grow: 1;
    overflow-y: auto;
    padding: 2px 0 0 0;
    min-height: 20px;
}

/* Compact task styling in Month View to prevent overflow */
.month-day-cell .task-card {
    padding: 6px 8px;
    margin-bottom: 4px;
    gap: 6px;
    border-radius: 4px;
}

.month-day-cell .task-content {
    font-size: 0.72rem;
    line-height: 1.3;
}

.month-day-cell .task-checkbox {
    width: 12px;
    height: 12px;
    margin-top: 2px;
}

.month-day-cell .task-card.done .task-checkbox::after {
    width: 3px;
    height: 6px;
    border-width: 0 1.5px 1.5px 0;
    margin-top: -3px;
}

@media (max-width: 1200px) {
    .month-grid {
        gap: 6px;
    }

    .month-day-cell {
        padding: 4px;
    }

    .month-day-cell .task-card {
        padding: 4px 6px;
    }
}