:root {
    --bg: #f3f6fb;
    --surface: rgba(255, 255, 255, 0.84);
    --surface-strong: rgba(255, 255, 255, 0.94);
    --surface-muted: #f7fafd;
    --surface-soft: #f2fbf5;
    --border: rgba(31, 35, 40, 0.10);
    --border-strong: rgba(31, 35, 40, 0.22);
    --text: #1f2328;
    --text-muted: #5b6573;
    --text-soft: #7b8490;
    --accent: #2da44e;
    --accent-dark: #1f883d;
    --accent-contrast: #ffffff;
    --accent-blue: #0969da;
    --accent-blue-soft: #e8f3ff;
    --nav-bg: rgba(13, 17, 23, 0.84);
    --nav-text: #f0f6fc;
    --success: #1a7f37;
    --danger: #cf222e;
    --shadow: 0 1px 0 rgba(15, 23, 42, 0.04), 0 12px 32px rgba(15, 23, 42, 0.08);
    --shadow-soft: 0 20px 45px rgba(15, 23, 42, 0.08);
    --radius-sm: 12px;
    --radius-md: 18px;
    --radius-lg: 24px;
}

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(45, 164, 78, 0.10), transparent 24%),
        radial-gradient(circle at top right, rgba(9, 105, 218, 0.12), transparent 20%),
        radial-gradient(circle at 50% 100%, rgba(255, 193, 7, 0.08), transparent 26%),
        linear-gradient(180deg, #f8fbff 0%, #f3f6fb 52%, #eef3f8 100%);
    color: var(--text);
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    text-rendering: optimizeLegibility;
}

main.container-xxl {
    position: relative;
}

main.container-xxl::before {
    content: '';
    position: fixed;
    inset: auto auto -12rem -12rem;
    width: 24rem;
    height: 24rem;
    background: radial-gradient(circle, rgba(9, 105, 218, 0.10), transparent 70%);
    pointer-events: none;
    filter: blur(20px);
    z-index: 0;
}

main.container-xxl > * {
    position: relative;
    z-index: 1;
}

.app-header {
    background: var(--nav-bg);
    backdrop-filter: blur(16px) saturate(150%);
    -webkit-backdrop-filter: blur(16px) saturate(150%);
    border-bottom-color: rgba(240, 246, 252, 0.10) !important;
    box-shadow: 0 10px 34px rgba(13, 17, 23, 0.12);
}

.navbar {
    min-height: 74px;
}

.brand-mark {
    width: 40px;
    height: 40px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-blue) 100%);
    color: var(--accent-contrast);
    font-size: 1rem;
    box-shadow: 0 14px 30px rgba(9, 105, 218, 0.28);
}

.brand-title {
    color: var(--nav-text);
    font-size: 0.98rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
}

.brand-subtitle {
    color: rgba(240, 246, 252, 0.72);
    font-size: 0.77rem;
    line-height: 1.2;
}

.panel {
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, var(--surface-strong) 0%, rgba(255, 255, 255, 0.78) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    padding: 1.35rem;
}

.panel::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.28), transparent 36%);
    pointer-events: none;
}

.panel > * {
    position: relative;
    z-index: 1;
}

.panel-hero {
    padding: 1.6rem;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--accent-blue);
    background: rgba(9, 105, 218, 0.08);
    border: 1px solid rgba(9, 105, 218, 0.12);
    border-radius: 999px;
    padding: 0.38rem 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.70rem;
    font-weight: 700;
    margin-bottom: 0.95rem;
}

.hero-title,
.panel-title,
.detail-title {
    letter-spacing: -0.04em;
}

.hero-title {
    font-size: clamp(1.9rem, 3vw, 2.6rem);
    line-height: 1.05;
    margin-bottom: 0.85rem;
}

.hero-copy {
    color: var(--text-muted);
    max-width: 48ch;
    margin-bottom: 0;
}

.meta-chip,
.priority-badge,
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.46rem 0.78rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 650;
    border: 1px solid var(--border);
    background: rgba(247, 250, 253, 0.92);
    color: var(--text);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.stat-card {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 100%;
    transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
    border-color: rgba(9, 105, 218, 0.16);
}

.stat-card::before {
    content: '';
    position: absolute;
    inset: 0 auto auto 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent), var(--accent-blue));
}

.stat-card::after {
    content: '';
    position: absolute;
    top: -2rem;
    right: -2rem;
    width: 8rem;
    height: 8rem;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(9, 105, 218, 0.12), transparent 70%);
    pointer-events: none;
}

.stat-card-total {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(240, 247, 255, 0.88) 100%);
}

.stat-card-active {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(237, 245, 255, 0.90) 100%);
}

.stat-card-done {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(239, 251, 243, 0.90) 100%);
}

.stat-card-urgent {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(255, 247, 236, 0.90) 100%);
}

.stat-card-active::before {
    background: linear-gradient(90deg, var(--accent-blue), #54aeff);
}

.stat-card-done::before {
    background: linear-gradient(90deg, var(--accent), #7ee787);
}

.stat-card-urgent::before {
    background: linear-gradient(90deg, #fb8500, #f2cc60);
}

.stat-label,
.stat-note,
.detail-label,
.task-meta,
.form-text,
.form-label {
    color: var(--text-muted);
}

.stat-label,
.detail-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
}

.stat-value {
    font-size: clamp(2rem, 3vw, 2.55rem);
    line-height: 1;
    letter-spacing: -0.06em;
    margin: 0.75rem 0 0.42rem;
}

.stat-note {
    font-size: 0.86rem;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1.1rem;
    padding-bottom: 0.95rem;
    border-bottom: 1px solid rgba(31, 35, 40, 0.08);
}

.panel-header-stack {
    align-items: stretch;
}

.panel-title {
    font-size: 1.18rem;
    font-weight: 750;
}

.form-label {
    font-size: 0.86rem;
    font-weight: 650;
    margin-bottom: 0.45rem;
}

.form-control,
.form-select,
.input-group-text,
.btn,
.dropdown-menu {
    border-radius: var(--radius-sm);
}

.form-control,
.form-select,
.input-group-text {
    border-color: rgba(31, 35, 40, 0.10);
    min-height: 48px;
    background: rgba(255, 255, 255, 0.78);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
}

.form-control::placeholder,
.form-select::placeholder {
    color: #97a0ab;
}

.form-control:hover,
.form-select:hover {
    border-color: rgba(9, 105, 218, 0.20);
}

.form-control:focus,
.form-select:focus {
    border-color: rgba(9, 105, 218, 0.45);
    background: #ffffff;
    box-shadow: 0 0 0 0.24rem rgba(9, 105, 218, 0.11);
}

textarea.form-control {
    min-height: 124px;
    resize: vertical;
}

.btn {
    min-height: 44px;
    font-weight: 650;
    letter-spacing: -0.01em;
    box-shadow: none !important;
    transition: transform 0.18s ease, background-color 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.btn:hover,
.btn:focus {
    transform: translateY(-1px);
}

.btn-dark {
    background: linear-gradient(180deg, #3fb950 0%, var(--accent) 100%);
    border-color: var(--accent-dark);
    color: var(--accent-contrast);
    box-shadow: 0 12px 24px rgba(45, 164, 78, 0.18) !important;
}

.btn-dark:hover,
.btn-dark:focus {
    background: linear-gradient(180deg, #2ea043 0%, var(--accent-dark) 100%);
    border-color: #1a7f37;
    color: var(--accent-contrast);
    box-shadow: 0 16px 28px rgba(31, 136, 61, 0.24) !important;
}

.btn-light {
    background: rgba(246, 248, 250, 0.92);
    border-color: rgba(31, 35, 40, 0.10);
    color: var(--text);
}

.btn-light:hover,
.btn-light:focus {
    background: #ffffff;
    border-color: rgba(9, 105, 218, 0.16);
    color: var(--text);
}

.filters-grid {
    display: grid;
    gap: 0.8rem;
}

.btn-filter {
    border: 1px solid rgba(31, 35, 40, 0.10);
    background: rgba(247, 250, 253, 0.88);
    color: var(--text);
    padding-inline: 0.95rem;
}

.btn-filter:hover {
    border-color: rgba(9, 105, 218, 0.22);
    color: var(--accent-blue);
    background: #ffffff;
}

.btn-check:checked + .btn-filter {
    background: var(--accent-blue-soft);
    color: var(--accent-blue);
    border-color: rgba(9, 105, 218, 0.24);
    box-shadow: inset 0 0 0 1px rgba(9, 105, 218, 0.08);
}

.sort-select {
    min-width: 180px;
}

.task-list {
    display: grid;
    gap: 0.85rem;
    max-height: 70vh;
    overflow: auto;
    padding-right: 0.25rem;
}

.task-item {
    position: relative;
    border: 1px solid rgba(31, 35, 40, 0.08);
    border-radius: var(--radius-md);
    padding: 1.05rem;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(250, 252, 255, 0.88) 100%);
    cursor: pointer;
    transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease, background-color 0.18s ease;
}

.task-item::before {
    content: '';
    position: absolute;
    inset: 0 auto 0 0;
    width: 0;
    border-radius: inherit;
    background: linear-gradient(180deg, var(--accent-blue), #54aeff);
    transition: width 0.18s ease;
}

.task-item > * {
    position: relative;
    z-index: 1;
}

.task-item:focus-visible {
    outline: none;
    border-color: rgba(9, 105, 218, 0.36);
    box-shadow: 0 0 0 4px rgba(9, 105, 218, 0.12);
}

.task-item:hover {
    border-color: rgba(9, 105, 218, 0.24);
    box-shadow: 0 18px 34px rgba(9, 105, 218, 0.10);
    background: #ffffff;
    transform: translateY(-2px);
}

.task-item:hover::before,
.task-item-active::before {
    width: 4px;
}

.task-item-active {
    border-color: rgba(9, 105, 218, 0.30);
    box-shadow: 0 20px 38px rgba(9, 105, 218, 0.12);
    background: linear-gradient(180deg, #ffffff 0%, #f4f9ff 100%);
}

.task-item-done {
    background: linear-gradient(180deg, rgba(246, 255, 248, 0.94) 0%, rgba(239, 251, 243, 0.90) 100%);
}

.check-button {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid rgba(31, 35, 40, 0.10);
    background: rgba(255, 255, 255, 0.94);
    color: var(--text-muted);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.05rem;
    transition: all 0.18s ease;
}

.check-button:hover {
    border-color: rgba(45, 164, 78, 0.24);
    color: var(--accent);
    background: #ffffff;
    transform: scale(1.03);
}

.task-title-link {
    font-weight: 700;
    color: var(--text);
    text-decoration: none;
    font-size: 1rem;
}

.task-title-link:hover {
    color: var(--accent-blue);
}

.task-snippet,
.detail-description {
    color: var(--text-muted);
    line-height: 1.58;
}

.task-item-done .task-title-link,
.task-item-done .task-snippet {
    opacity: 0.74;
}

.task-meta {
    font-size: 0.79rem;
}

.priority-high,
.priority-medium,
.priority-low,
.status-active,
.status-done {
    border: 1px solid rgba(31, 35, 40, 0.08);
}

.priority-high {
    background: #fff1f1;
    color: #ae2a19;
    border-color: rgba(207, 34, 46, 0.18);
}

.priority-medium {
    background: #fff9db;
    color: #9a6700;
    border-color: rgba(154, 103, 0, 0.16);
}

.priority-low {
    background: #ddfbe6;
    color: #1a7f37;
    border-color: rgba(26, 127, 55, 0.16);
}

.status-active {
    background: var(--accent-blue-soft);
    color: var(--accent-blue);
    border-color: rgba(9, 105, 218, 0.16);
}

.status-done {
    background: #ddfbe6;
    color: var(--success);
    border-color: rgba(26, 127, 55, 0.16);
}

.icon-button {
    width: 36px;
    height: 36px;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.detail-panel {
    display: flex;
    flex-direction: column;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.95) 0%, rgba(244, 248, 253, 0.90) 100%);
}

.detail-stack {
    height: 100%;
}

.detail-title {
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
}

.detail-block {
    padding: 1rem 1.05rem;
    border: 1px solid rgba(31, 35, 40, 0.08);
    border-radius: var(--radius-md);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(247, 250, 253, 0.88) 100%);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.55);
}

.detail-value {
    margin-top: 0.34rem;
    font-weight: 650;
}

.empty-state {
    border: 1px dashed rgba(31, 35, 40, 0.16);
    border-radius: var(--radius-md);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.88) 0%, rgba(244, 248, 253, 0.86) 100%);
    padding: 1.5rem;
}

.empty-icon {
    width: 60px;
    height: 60px;
    margin-inline: auto;
    border-radius: 18px;
    background: linear-gradient(180deg, #ffffff 0%, #f3f7fb 100%);
    border: 1px solid rgba(31, 35, 40, 0.08);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.45rem;
    color: var(--accent-blue);
    box-shadow: 0 12px 28px rgba(9, 105, 218, 0.10);
}

.toast {
    border-radius: 14px;
    box-shadow: 0 20px 42px rgba(13, 17, 23, 0.18);
}

.stretched-link-reset {
    position: relative;
    z-index: 2;
}

.toggle-form,
.dropdown form {
    position: relative;
    z-index: 2;
}

::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-thumb {
    background: rgba(123, 132, 144, 0.45);
    border-radius: 999px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

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

@media (min-width: 1200px) {
    #task-form,
    .detail-panel {
        position: sticky;
        top: 92px;
    }
}

@media (max-width: 1199.98px) {
    .task-list {
        max-height: none;
    }
}

@media (max-width: 767.98px) {
    .panel,
    .panel-hero {
        padding: 1rem;
    }

    .hero-title {
        font-size: 1.7rem;
    }

    .panel-header {
        flex-direction: column;
        align-items: stretch;
    }

    .sort-select {
        width: 100%;
    }

    .stat-value {
        font-size: 1.85rem;
    }
}

.navbar .btn-dark {
    min-width: 132px;
}

.btn-outline-danger {
    border-color: rgba(207, 34, 46, 0.22);
    color: var(--danger);
    background: rgba(255, 255, 255, 0.82);
}

.btn-outline-danger:hover,
.btn-outline-danger:focus {
    background: var(--danger);
    border-color: var(--danger);
}