/* ============================================
   TASKFLOW · PREMIUM STYLES
   ============================================ */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: radial-gradient(circle at 10% 20%, #0b1120, #0a0f1a);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    color: #eef2ff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app-container {
    max-width: 1400px;
    width: 100%;
    background: rgba(18, 26, 40, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 3rem;
    padding: 2.5rem 2.8rem;
    box-shadow: 0 30px 50px -20px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(255, 255, 255, 0.02) inset;
}

/* ---------- Header ---------- */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.header-actions {
    display: flex;
    gap: 0.8rem;
    flex-wrap: wrap;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #6d8cff, #a46eff);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    box-shadow: 0 8px 20px -6px #6d8cff80;
    color: #fff;
}

.logo-text {
    font-size: 1.9rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #ffffff, #c7d2fe);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.badge {
    background: rgba(109, 140, 255, 0.15);
    border: 1px solid rgba(109, 140, 255, 0.3);
    padding: 0.5rem 1.2rem;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #a8b8ff;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: inherit;
}

.badge-btn {
    cursor: pointer;
    transition: all 0.2s ease;
}

.badge-btn:hover {
    background: rgba(109, 140, 255, 0.3);
    transform: translateY(-2px);
}

#installBadge {
    background: rgba(164, 110, 255, 0.15);
    border-color: rgba(164, 110, 255, 0.4);
    color: #d3b8ff;
}

#installBadge:hover {
    background: rgba(164, 110, 255, 0.3);
}

#notifyBadge {
    background: rgba(100, 255, 180, 0.12);
    border-color: rgba(100, 255, 180, 0.3);
    color: #9dffc9;
}

#notifyBadge:hover {
    background: rgba(100, 255, 180, 0.25);
}

/* ---------- Tabs ---------- */
.tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2rem;
    background: rgba(0, 0, 0, 0.2);
    padding: 0.4rem;
    border-radius: 1.2rem;
    border: 1px solid rgba(255, 255, 255, 0.04);
    width: fit-content;
}

.tab {
    background: transparent;
    border: none;
    color: #8e9bb8;
    padding: 0.7rem 1.4rem;
    border-radius: 0.9rem;
    font-size: 0.95rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tab:hover { color: #fff; }

.tab.active {
    background: linear-gradient(135deg, #6d8cff, #8f6eff);
    color: #fff;
    box-shadow: 0 6px 16px -6px #6d8cff;
}

.tab-panel { display: none; animation: fadeIn 0.3s ease; }
.tab-panel.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ---------- Grid ---------- */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
}

/* ---------- Section ---------- */
.section {
    background: rgba(12, 18, 30, 0.6);
    border-radius: 2rem;
    padding: 2rem 1.8rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 20px 35px -15px #00000080, inset 0 0 0 1px rgba(255, 255, 255, 0.02);
    transition: border-color 0.2s ease;
}

.section:hover { border-color: rgba(109, 140, 255, 0.2); }

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: 1.6rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.section-title i {
    color: #6d8cff;
    font-size: 1.7rem;
}

.count-badge {
    background: rgba(255, 255, 255, 0.05);
    padding: 0.3rem 1rem;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    color: #9aa9c7;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* ---------- Add Form ---------- */
.add-form {
    display: flex;
    gap: 0.6rem;
    margin-bottom: 0.8rem;
}

.add-form input[type="text"] { flex: 1; min-width: 0; }

.add-form input {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 1.2rem;
    padding: 0.95rem 1.3rem;
    font-size: 0.95rem;
    font-family: inherit;
    color: #fff;
    outline: none;
    transition: all 0.2s ease;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.2);
}

.add-form input:focus {
    border-color: #6d8cff;
    background: rgba(0, 0, 0, 0.5);
    box-shadow: 0 0 0 3px rgba(109, 140, 255, 0.2);
}

.add-form input::placeholder { color: #6b7a9c; }

.date-input {
    width: 140px;
    font-size: 0.85rem !important;
    color-scheme: dark;
}

.target-input {
    width: 70px;
    text-align: center;
}

.add-form button {
    background: linear-gradient(135deg, #6d8cff, #8f6eff);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 1.2rem;
    width: 3.5rem;
    height: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 10px 20px -8px #6d8cff;
    flex-shrink: 0;
}

.add-form button:hover {
    transform: scale(1.03);
    box-shadow: 0 14px 24px -8px #6d8cff;
}

.add-form button:active { transform: scale(0.98); }

/* ---------- Repeat Row ---------- */
.repeat-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 1rem;
}

.repeat-label {
    font-size: 0.82rem;
    color: #8e9bb8;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
}

.repeat-select {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.07);
    border-radius: 0.8rem;
    padding: 0.45rem 0.9rem;
    font-size: 0.82rem;
    font-family: inherit;
    color: #c7d2fe;
    cursor: pointer;
    outline: none;
    transition: all 0.2s ease;
}

.repeat-select:focus { border-color: #6d8cff; }

.repeat-select option {
    background: #141c2d;
    color: #fff;
}

/* ---------- Filters ---------- */
.filters {
    display: flex;
    gap: 0.4rem;
    margin-bottom: 1.2rem;
    flex-wrap: wrap;
}

.filter-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: #8e9bb8;
    padding: 0.4rem 0.9rem;
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filter-btn:hover { color: #fff; border-color: rgba(109, 140, 255, 0.3); }

.filter-btn.active {
    background: rgba(109, 140, 255, 0.15);
    border-color: rgba(109, 140, 255, 0.5);
    color: #a8b8ff;
}

/* ---------- Items List ---------- */
.items-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.3rem;
}

.items-list::-webkit-scrollbar { width: 6px; }
.items-list::-webkit-scrollbar-track { background: transparent; }
.items-list::-webkit-scrollbar-thumb { background: #2a3550; border-radius: 10px; }
.items-list::-webkit-scrollbar-thumb:hover { background: #3f4d70; }

/* ---------- Item Card ---------- */
.item-card {
    background: rgba(20, 28, 45, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 1.4rem;
    padding: 1rem 1.2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.2s ease;
    backdrop-filter: blur(4px);
    animation: fadeIn 0.3s ease;
    position: relative;
}

.item-card.overdue {
    border-color: rgba(255, 100, 100, 0.3);
    background: rgba(40, 20, 28, 0.6);
}

.item-card:hover {
    background: rgba(28, 38, 60, 0.9);
    border-color: rgba(109, 140, 255, 0.3);
    transform: translateX(3px);
}

/* ---------- Check Button ---------- */
.item-check {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid #3f4d70;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    flex-shrink: 0;
    background: transparent;
    color: white;
    font-size: 0.85rem;
    user-select: none;
}

.item-check:hover {
    border-color: #6d8cff;
    transform: scale(1.1);
}

.item-check.completed {
    background: linear-gradient(135deg, #6d8cff, #a46eff);
    border-color: transparent;
    box-shadow: 0 0 12px #6d8cffaa;
}

.item-check.completed i { display: block; }
.item-check i { display: none; }

.habit-progress {
    font-size: 0.78rem;
    font-weight: 600;
    color: #fff;
}

/* ---------- Item Content ---------- */
.item-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}

.item-text {
    font-size: 1.02rem;
    font-weight: 500;
    word-break: break-word;
    transition: color 0.2s ease;
    line-height: 1.4;
    cursor: pointer;
    padding: 0.15rem 0.35rem;
    border-radius: 6px;
    margin-left: -0.35rem;
    user-select: text;
}

.item-text:hover { background: rgba(109, 140, 255, 0.08); }

.item-text.completed-text {
    text-decoration: line-through;
    color: #6b7a9c;
}

.item-meta {
    font-size: 0.75rem;
    color: #6b7a9c;
    display: flex;
    align-items: center;
    gap: 0.9rem;
    flex-wrap: wrap;
}

.item-meta i { margin-right: 0.25rem; }

.deadline-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.15rem 0.6rem;
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 500;
    background: rgba(109, 140, 255, 0.12);
    color: #a8b8ff;
    border: 1px solid rgba(109, 140, 255, 0.2);
}

.deadline-badge.overdue {
    background: rgba(255, 100, 100, 0.12);
    color: #ff9d9d;
    border-color: rgba(255, 100, 100, 0.3);
}

.deadline-badge.today {
    background: rgba(255, 200, 100, 0.15);
    color: #ffd47a;
    border-color: rgba(255, 200, 100, 0.3);
}

.repeat-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.15rem 0.6rem;
    border-radius: 100px;
    font-size: 0.72rem;
    font-weight: 500;
    background: rgba(164, 110, 255, 0.12);
    color: #d3b8ff;
    border: 1px solid rgba(164, 110, 255, 0.25);
}

/* ---------- Item Actions ---------- */
.item-actions {
    display: flex;
    gap: 0.3rem;
    opacity: 0.6;
    transition: opacity 0.2s ease;
    pointer-events: auto;
}

.item-card:hover .item-actions { opacity: 1; }

.icon-btn {
    background: transparent;
    border: none;
    color: #8e9bb8;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.9rem;
    pointer-events: auto;
    position: relative;
    z-index: 2;
}

.icon-btn:hover {
    background: rgba(255, 255, 255, 0.07);
    color: #fff;
    transform: scale(1.05);
}

.icon-btn.delete:hover {
    color: #ff7b7b;
    background: rgba(255, 80, 80, 0.1);
}

.icon-btn:active { transform: scale(0.95); }

/* ---------- Empty State ---------- */
.empty-state {
    text-align: center;
    padding: 2.5rem 1rem;
    color: #5a6a8c;
    font-size: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
}

.empty-state i { font-size: 2.5rem; opacity: 0.3; }

/* ---------- Habit Progress Bar ---------- */
.habit-progress-bar {
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    margin-top: 0.4rem;
    overflow: hidden;
    width: 100%;
}

.habit-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #6d8cff, #a46eff);
    border-radius: 10px;
    width: 0%;
    transition: width 0.4s ease;
}

/* ---------- Stats ---------- */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.2rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: rgba(12, 18, 30, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 1.6rem;
    padding: 1.6rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.stat-card:hover {
    border-color: rgba(109, 140, 255, 0.3);
    transform: translateY(-3px);
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(109, 140, 255, 0.2), rgba(164, 110, 255, 0.2));
    color: #a8b8ff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-bottom: 0.4rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff, #a8b8ff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1;
}

.stat-label { font-size: 0.85rem; color: #8e9bb8; }

.chart-section {
    background: rgba(12, 18, 30, 0.6);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 1.6rem;
    padding: 1.8rem;
}

.chart-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: #c7d2fe;
}

.chart-title i { color: #6d8cff; }

.chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 0.8rem;
    height: 220px;
    padding: 0 0.5rem;
}

.chart-bar-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    height: 100%;
    justify-content: flex-end;
}

.chart-bar {
    width: 100%;
    max-width: 48px;
    background: linear-gradient(180deg, #a46eff, #6d8cff);
    border-radius: 10px 10px 4px 4px;
    min-height: 4px;
    transition: all 0.4s ease;
    box-shadow: 0 0 20px -5px #6d8cff80;
}

.chart-value {
    font-size: 0.75rem;
    font-weight: 600;
    color: #a8b8ff;
    height: 16px;
}

.chart-label {
    font-size: 0.75rem;
    color: #6b7a9c;
    font-weight: 500;
}

/* ---------- Modal ---------- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(5, 8, 15, 0.75);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1.5rem;
    animation: fadeIn 0.2s ease;
}

.modal-overlay[hidden] { display: none; }

.modal {
    background: rgba(20, 28, 45, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 2rem;
    padding: 2rem;
    max-width: 480px;
    width: 100%;
    box-shadow: 0 30px 60px -20px #000;
    animation: modalIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-title {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #fff;
}

.modal-input {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 1rem;
    padding: 0.9rem 1.2rem;
    font-size: 1rem;
    font-family: inherit;
    color: #fff;
    outline: none;
    margin-bottom: 1rem;
    transition: all 0.2s ease;
}

.modal-input:focus {
    border-color: #6d8cff;
    box-shadow: 0 0 0 3px rgba(109, 140, 255, 0.2);
}

.modal-extra { margin-bottom: 1rem; }

.modal-label {
    display: block;
    font-size: 0.85rem;
    color: #8e9bb8;
    margin-bottom: 0.4rem;
    font-weight: 500;
}

.modal-actions {
    display: flex;
    gap: 0.8rem;
    justify-content: flex-end;
    margin-top: 1.5rem;
}

.btn {
    border: none;
    border-radius: 1rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn-primary {
    background: linear-gradient(135deg, #6d8cff, #8f6eff);
    color: #fff;
    box-shadow: 0 10px 20px -8px #6d8cff;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 24px -8px #6d8cff;
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: #c7d2fe;
}

.btn-secondary:hover { background: rgba(255, 255, 255, 0.1); }

/* ---------- Toast ---------- */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(150%);
    background: rgba(20, 28, 45, 0.98);
    border: 1px solid rgba(109, 140, 255, 0.3);
    color: #fff;
    padding: 0.9rem 1.6rem;
    border-radius: 100px;
    font-size: 0.9rem;
    font-weight: 500;
    box-shadow: 0 20px 40px -10px #000;
    z-index: 2000;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    pointer-events: none;
}

.toast.show { transform: translateX(-50%) translateY(0); }
.toast i { color: #6d8cff; }

/* ---------- Footer ---------- */
.app-footer {
    margin-top: 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: #5a6a8c;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-actions {
    display: flex;
    gap: 0.6rem;
    flex-wrap: wrap;
}

.footer-btn {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.06);
    color: #a0aec9;
    padding: 0.55rem 1.1rem;
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-family: inherit;
}

.footer-btn:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(109, 140, 255, 0.3);
    color: #fff;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .grid-2 { grid-template-columns: 1fr; gap: 1.8rem; }
    .app-container { padding: 1.8rem; border-radius: 2.5rem; }
    .logo-text { font-size: 1.6rem; }
    .chart { height: 180px; }
}

@media (max-width: 500px) {
    body { padding: 0.8rem; }
    .app-container { padding: 1.3rem; border-radius: 2rem; }
    .section { padding: 1.4rem 1.1rem; }
    .add-form { flex-wrap: wrap; }
    .add-form input[type="text"] { width: 100%; flex: 1 1 100%; }
    .date-input { flex: 1; width: auto; }
    .section-title { font-size: 1.3rem; }
    .item-text { font-size: 0.95rem; }
    .app-footer { flex-direction: column; align-items: flex-start; }
    .footer-actions { width: 100%; }
    .footer-btn { flex: 1; justify-content: center; font-size: 0.75rem; padding: 0.5rem 0.8rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .stat-value { font-size: 1.6rem; }
    .tabs { width: 100%; }
    .tab { flex: 1; justify-content: center; }
}