/* ==========================================
   TaskNova - Custom Styles (Responsive)
   Font: Plus Jakarta Sans + Inter
   Mobile-first responsive design
   ========================================== */

* { box-sizing: border-box; }

body {
    font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   PAGE BACKGROUND
   ========================================== */
.page-bg { background: #f1f5f9; }
.dark .page-bg { background: #0f172a; }

/* ==========================================
   GLASSMORPHISM
   ========================================== */
.glass-panel {
    background: rgba(255, 255, 255, 0.98);
    border-color: #e2e8f0;
}
.dark .glass-panel {
    background: rgba(30, 41, 59, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-color: rgba(255, 255, 255, 0.06);
}
.glass-column { background: #ffffff; }
.dark .glass-column {
    background: rgba(22, 33, 54, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

/* ==========================================
   VIEW SECTIONS (JS-controlled display)
   ========================================== */
.view-section {
    width: 100%;
    animation: fadeSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ==========================================
   CUSTOM SCROLLBAR
   ========================================== */
.custom-scrollbar::-webkit-scrollbar { width: 4px; height: 4px; }
.custom-scrollbar::-webkit-scrollbar-track { background: transparent; }
.custom-scrollbar::-webkit-scrollbar-thumb { background: rgba(99,102,241,0.2); border-radius: 10px; }
.dark .custom-scrollbar::-webkit-scrollbar-thumb { background: rgba(99,102,241,0.35); }
.custom-scrollbar::-webkit-scrollbar-thumb:hover { background: rgba(99,102,241,0.5); }

/* ==========================================
   SIDEBAR — Desktop fixed, Mobile overlay
   ========================================== */
#sidebar {
    display: none;           /* hidden on mobile by default */
    flex-direction: column;
    width: 240px;
    min-width: 240px;
    background: #ffffff;
    border-right: 1px solid #e2e8f0;
    height: 100vh;
    position: fixed;
    left: 0; top: 0;
    z-index: 100;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.dark #sidebar {
    background: #0f172a;
    border-right-color: rgba(255,255,255,0.06);
}

/* Mobile: sidebar as slide-over when open */
#sidebar.mobile-open {
    display: flex;
    transform: translateX(0);
}

/* Tablet+: always visible, push content */
@media (min-width: 768px) {
    #sidebar {
        display: flex;
        position: relative;
        height: auto;
        min-height: 100%;
        width: 220px;
        min-width: 220px;
        border-right: 1px solid #e2e8f0;
        box-shadow: none;
        margin: 12px 0 12px 12px;
        border-radius: 16px;
        border: 1px solid #e2e8f0;
    }
    .dark #sidebar { border-color: rgba(255,255,255,0.06); }
    
    #mobile-nav-overlay { display: none !important; }
    #bottom-nav { display: none !important; }
}

/* Sidebar overlay (mobile) */
#mobile-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.4);
    z-index: 99;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
}
#mobile-nav-overlay.active { display: block; }

/* ==========================================
   NAV ITEMS
   ========================================== */
.nav-item {
    color: #64748b;
    border-left: 3px solid transparent;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 12px;
    transition: all 0.18s ease;
}
.nav-item:hover { color: #6366f1; background: rgba(99,102,241,0.07); border-left-color: rgba(99,102,241,0.3); }
.nav-item.is-active {
    background: linear-gradient(90deg, rgba(99,102,241,0.1) 0%, transparent 100%);
    border-left: 3px solid #6366f1;
    color: #6366f1;
    font-weight: 600;
}
.dark .nav-item { color: #94a3b8; }
.dark .nav-item:hover { color: #a5b4fc; background: rgba(129,140,248,0.1); }
.dark .nav-item.is-active { background: linear-gradient(90deg, rgba(129,140,248,0.18) 0%, transparent 100%); color: #818cf8; border-left-color: #818cf8; }
.nav-item.is-active i { color: inherit; }

/* ==========================================
   BOTTOM NAVIGATION (Mobile Only)
   ========================================== */
#bottom-nav {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    height: 60px;
    background: #ffffff;
    border-top: 1px solid #e2e8f0;
    z-index: 90;
    justify-content: space-around;
    align-items: center;
    padding: 0 8px;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.06);
}
.dark #bottom-nav { background: #0f172a; border-top-color: rgba(255,255,255,0.06); }

.bottom-nav-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 6px 8px;
    border-radius: 10px;
    color: #94a3b8;
    font-size: 10px;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.18s ease, background 0.18s ease;
    cursor: pointer;
    border: none;
    background: none;
}
.bottom-nav-item i { font-size: 16px; }
.bottom-nav-item.is-active { color: #6366f1; }
.dark .bottom-nav-item { color: #64748b; }
.dark .bottom-nav-item.is-active { color: #818cf8; }

/* ==========================================
   HEADER
   ========================================== */
#main-header {
    height: 60px;
    background: #ffffff;
    border-bottom: 1px solid #e2e8f0;
    box-shadow: 0 1px 8px rgba(0,0,0,0.04);
    position: sticky;
    top: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
}
.dark #main-header { background: #0f172a; border-bottom-color: rgba(255,255,255,0.06); }

@media (min-width: 640px) {
    #main-header { height: 68px; padding: 0 24px; }
}

/* ==========================================
   MAIN LAYOUT
   ========================================== */
#app-root {
    display: flex;
    height: 100vh;
    overflow: hidden;
}
#main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* Content area: padding-bottom for mobile bottom nav */
#content-area {
    flex: 1;
    overflow: auto;
    padding: 16px;
    height: 0; /* Force flex child to respect parent */
    padding-bottom: 96px; /* room for bottom nav (60px) + shadow + breathing room */
}
@media (min-width: 640px) { #content-area { padding: 20px 24px; } }
@media (min-width: 768px) { #content-area { padding-bottom: 20px; } } /* no bottom nav on tablet+ */

/* ==========================================
   BOARD VIEW — Responsive columns
   ========================================== */
#view-board {
    display: flex;
    gap: 16px;
    /* Mobile: height auto so stacked columns expand freely;
       #content-area scroll handles vertical overflow */
    height: auto;
    min-height: 100%;
    align-items: flex-start;
    flex-direction: column;
    min-width: unset;
}

/* Mobile: columns are full-width, expand naturally (content-area scrolls) */
.kanban-col {
    width: 100%;
    flex-shrink: 0;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    overflow: visible; /* allow cards to show fully on mobile */
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    background: #ffffff;
    display: flex;
    flex-direction: column;
}
.dark .kanban-col { background: rgba(22,33,54,0.92); border-color: rgba(99,102,241,0.12); }

/* Task list: on mobile, expand to fit all cards — outer content-area scrolls */
.task-list {
    flex: 1;
    overflow-y: visible;
    padding: 12px;
    padding-bottom: 16px;
    min-height: 80px;
}

/* On mobile, last kanban column (Done) gets extra bottom clearance so
   cards aren't hidden behind the fixed bottom nav */
@media (max-width: 639px) {
    .kanban-col:last-child .task-list {
        padding-bottom: 24px;
    }
    .kanban-col:last-child {
        margin-bottom: 8px;
    }
}

/* Tablet: horizontal scroll with fixed width cards, contained scroll */
@media (min-width: 640px) {
    #view-board {
        flex-direction: row;
        min-width: max-content;
        gap: 20px;
    }
    .kanban-col {
        width: 300px;
        max-height: 100%;
        min-height: 200px;
        overflow: hidden; /* restore clipping so inner task-list scrolls */
    }
    .task-list {
        overflow-y: auto; /* inner column scroll on tablet+ */
    }
}
@media (min-width: 1024px) {
    .kanban-col { width: 320px; }
}

/* ==========================================
   COLUMN HEADER
   ========================================== */
.col-header {
    background: #ffffff;
    border-bottom: 1px solid #f1f5f9;
    padding: 14px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    /* sticky only makes sense when the column itself scrolls (tablet+) */
    position: relative;
    z-index: 10;
}
/* On tablet+, col-header sticks to top of its scrolling column */
@media (min-width: 640px) {
    .col-header { position: sticky; top: 0; }
}
.dark .col-header { background: rgba(22,33,54,0.98); border-bottom-color: rgba(99,102,241,0.1); }

/* ==========================================
   TASK CARDS
   ========================================== */
@keyframes slideUpCard {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.task-card {
    cursor: grab;
    transition: transform 0.18s ease, box-shadow 0.18s ease;
    will-change: transform;
    background: #ffffff;
    border: 1px solid #e8edf3;
    border-radius: 12px;
    touch-action: none; /* important for touch drag */
    animation: slideUpCard 0.28s cubic-bezier(0.22, 1, 0.36, 1) both;
}
.dark .task-card { background: #1e293b; border-color: rgba(99,102,241,0.12); }
.task-card:active { cursor: grabbing; }

/* Hover lift only on non-touch (pointer: fine) devices */
@media (hover: hover) and (pointer: fine) {
    .task-card:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px -4px rgba(99,102,241,0.15);
    }
    .dark .task-card:hover { box-shadow: 0 12px 28px -8px rgba(0,0,0,0.5); }
}
.task-card.completed .task-title { text-decoration: line-through; opacity: 0.45; }

/* Show action buttons always on mobile (no hover) */
.card-actions { opacity: 1; }
@media (min-width: 768px) {
    .card-actions {
        opacity: 0;
        transition: opacity 0.2s ease;
    }
    .task-card:hover .card-actions { opacity: 1; }
}

/* ==========================================
   PRIORITY BADGES
   ========================================== */
.badge-high   { background: #fef2f2; color: #dc2626; border: 1px solid #fecaca; }
.badge-medium { background: #fff7ed; color: #c2410c; border: 1px solid #fed7aa; }
.badge-low    { background: #fefce8; color: #a16207; border: 1px solid #fde68a; }
.dark .badge-high   { background: rgba(220,38,38,0.15); color: #f87171; border-color: rgba(220,38,38,0.3); }
.dark .badge-medium { background: rgba(234,88,12,0.15);  color: #fb923c; border-color: rgba(234,88,12,0.3); }
.dark .badge-low    { background: rgba(202,138,4,0.15);  color: #fbbf24; border-color: rgba(202,138,4,0.3); }

/* ==========================================
   SORTABLE DRAG
   ========================================== */
.sortable-ghost {
    opacity: 0.4;
    background: #eef2ff !important;
    border: 2px dashed #6366f1 !important;
    box-shadow: none !important;
    transform: none !important;
}
.dark .sortable-ghost { background: rgba(30,41,59,0.7) !important; border-color: #818cf8 !important; }
.sortable-drag {
    opacity: 1 !important;
    cursor: grabbing !important;
    box-shadow: 0 20px 50px -10px rgba(99,102,241,0.35) !important;
    transform: scale(1.03) rotate(0.8deg) !important;
}

/* ==========================================
   FOCUS MODE
   ========================================== */
.focus-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 16px;
}
.focus-card {
    width: 100%;
    max-width: 440px;
    padding: 32px 24px;
}
.focus-circle-size {
    width: 200px;
    height: 200px;
}
@media (min-width: 480px) {
    .focus-circle-size { width: 260px; height: 260px; }
    .focus-card { padding: 40px; }
}
@media (min-width: 768px) {
    .focus-circle-size { width: 288px; height: 288px; }
}

/* ==========================================
   MODAL — Full screen on mobile
   ========================================== */
#task-modal, #delete-modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    background: rgba(15,23,42,0.45);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    display: none;
    align-items: flex-end; /* bottom sheet on mobile */
    justify-content: center;
}
@media (min-width: 640px) {
    #task-modal, #delete-modal { align-items: center; }
}
.modal-panel {
    background: #ffffff;
    width: 100%;
    max-height: 95vh;
    border-radius: 24px 24px 0 0;
    padding: 20px;
    overflow-y: auto;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -20px 60px rgba(0,0,0,0.15);
}
.dark .modal-panel { background: #1e293b; }

@media (min-width: 640px) {
    .modal-panel {
        width: 90%;
        max-width: 520px;
        border-radius: 24px;
        transform: scale(0.95);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.3s ease;
        box-shadow: 0 25px 60px rgba(0,0,0,0.2);
    }
}

#task-modal.is-open, #delete-modal.is-open { display: flex; }
#task-modal.is-open .modal-panel, #delete-modal.is-open .modal-panel {
    transform: translateY(0);
    opacity: 1;
}
@media (min-width: 640px) {
    #task-modal.is-open .modal-panel, #delete-modal.is-open .modal-panel { transform: scale(1); }
}

/* ==========================================
   DASHBOARD — Responsive grid
   ========================================== */
#view-dashboard { overflow-y: auto; }
.dash-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}
@media (min-width: 640px) { .dash-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1024px) { .dash-grid { grid-template-columns: repeat(3, 1fr); } }

/* ==========================================
   TOAST NOTIFICATIONS
   ========================================== */
#toast-container {
    position: fixed;
    bottom: 72px; /* above bottom nav on mobile */
    right: 16px;
    z-index: 300;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
    max-width: calc(100vw - 32px);
}
@media (min-width: 768px) {
    #toast-container { bottom: 24px; right: 24px; max-width: 380px; }
}
@keyframes toastIn {
    from { transform: translateX(110%) scale(0.9); opacity: 0; }
    to   { transform: translateX(0) scale(1); opacity: 1; }
}
@keyframes toastOut {
    from { transform: translateX(0) scale(1); opacity: 1; }
    to   { transform: translateX(110%) scale(0.9); opacity: 0; }
}
.toast-enter { animation: toastIn 0.4s cubic-bezier(0.175,0.885,0.32,1.275) forwards; }
.toast-exit  { animation: toastOut 0.3s ease-in forwards; }

/* ==========================================
   GAMIFICATION WIDGET
   ========================================== */
.sidebar-gami-bg { background: #f8faff; border: 1px solid #e0e7ff; }
.dark .sidebar-gami-bg { background: rgba(99,102,241,0.1); border-color: rgba(99,102,241,0.15); }

/* ==========================================
   SEARCH BAR
   ========================================== */
.search-input-wrap { position: relative; }
.search-input-wrap input {
    width: 160px;
    transition: width 0.3s ease;
}
@media (min-width: 640px) { .search-input-wrap input { width: 220px; } }
@media (min-width: 1024px) { .search-input-wrap input { width: 280px; } }
.search-input-wrap input:focus { width: 260px; }
@media (min-width: 1024px) { .search-input-wrap input:focus { width: 320px; } }

/* ==========================================
   FOCUS CIRCLE (responsive SVG)
   ========================================== */
.shadow-glow { filter: drop-shadow(0 0 14px rgba(99,102,241,0.55)); }

/* ==========================================
   PRINT: clean output
   ========================================== */
@media print {
    #sidebar, #bottom-nav, #main-header, #task-modal { display: none !important; }
    #content-area { overflow: visible; height: auto; padding: 0; }
}

/* ==========================================
   SYNC STATUS PILL
   ========================================== */
.sync-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.04em;
    border: 1px solid transparent;
    transition: background 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    white-space: nowrap;
    cursor: default;
    flex-shrink: 0;
}

/* Dot inside the pill */
.sync-dot {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: background 0.3s ease;
}

/* ── States ── */
.sync-online {
    background: #f0fdf4;
    color: #15803d;
    border-color: #bbf7d0;
}
.sync-online .sync-dot { background: #22c55e; }
.dark .sync-online { background: rgba(34,197,94,0.12); color: #4ade80; border-color: rgba(34,197,94,0.25); }
.dark .sync-online .sync-dot { background: #4ade80; }

.sync-offline {
    background: #fffbeb;
    color: #b45309;
    border-color: #fde68a;
}
.sync-offline .sync-dot { background: #f59e0b; }
.dark .sync-offline { background: rgba(245,158,11,0.12); color: #fbbf24; border-color: rgba(245,158,11,0.25); }
.dark .sync-offline .sync-dot { background: #fbbf24; }

.sync-syncing {
    background: #eef2ff;
    color: #6366f1;
    border-color: #c7d2fe;
}
.sync-syncing .sync-dot { background: #6366f1; }
.dark .sync-syncing { background: rgba(99,102,241,0.12); color: #a5b4fc; border-color: rgba(99,102,241,0.25); }
.dark .sync-syncing .sync-dot { background: #818cf8; }

.sync-error {
    background: #fef2f2;
    color: #dc2626;
    border-color: #fecaca;
}
.sync-error .sync-dot { background: #ef4444; }
.dark .sync-error { background: rgba(239,68,68,0.12); color: #f87171; border-color: rgba(239,68,68,0.25); }
.dark .sync-error .sync-dot { background: #f87171; }

/* Spinning animation for the syncing dot */
@keyframes syncSpin {
    0%   { transform: scale(1);   opacity: 1; }
    50%  { transform: scale(0.4); opacity: 0.3; }
    100% { transform: scale(1);   opacity: 1; }
}
.sync-spin { animation: syncSpin 1.2s ease-in-out infinite; }