:root {
    --bg: #0f172a;
    --line: #334155;
    --text: #e5e7eb;
    --muted: #94a3b8;
    --accent: #38bdf8;
    --accent-2: #0ea5e9;
    --success: #22c55e;
    --danger: #ef4444;
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(180deg, #020617 0%, #0f172a 100%);
    color: var(--text);
    min-height: 100vh;
}

.container {
    width: min(1180px, calc(100% - 32px));
    margin: 0 auto;
}

.hidden {
    display: none !important;
}

.app-header {
    position: sticky;
    top: 0;
    z-index: 10;
    backdrop-filter: blur(10px);
    background: rgba(2, 6, 23, 0.82);
    border-bottom: 1px solid rgba(148, 163, 184, 0.14);
}

.header-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    padding: 18px 0;
}

.brand h1 {
    margin: 0;
    font-size: 24px;
}

.brand p,
.muted {
    color: var(--muted);
    margin: 4px 0 0;
}

.user-box {
    display: flex;
    align-items: center;
    gap: 12px;
}

.pill {
    background: rgba(56, 189, 248, 0.12);
    color: #bae6fd;
    border: 1px solid rgba(56, 189, 248, 0.24);
    padding: 8px 12px;
    border-radius: 999px;
    font-size: 14px;
}

.page {
    padding: 28px 0 40px;
}

.hero {
    max-width: 760px;
    margin: 40px auto 24px;
    text-align: center;
}

.hero h2 {
    font-size: 40px;
    margin-bottom: 12px;
}

.hero p {
    color: var(--muted);
    line-height: 1.6;
    margin: 0;
}

.auth-layout,
.main-layout {
    display: grid;
    gap: 20px;
}

.auth-layout {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    align-items: start;
    margin-top: 28px;
}

.main-layout {
    grid-template-columns: 380px 1fr;
    align-items: start;
}

.card {
    background: rgba(17, 24, 39, 0.96);
    border: 1px solid rgba(148, 163, 184, 0.14);
    border-radius: 22px;
    box-shadow: var(--shadow);
    padding: 22px;
}

.card h3,
.card h2 {
    margin-top: 0;
}

.field {
    margin-bottom: 16px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: #cbd5e1;
}

input,
textarea,
select {
    width: 100%;
    padding: 12px 14px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: #0b1220;
    color: var(--text);
    font-size: 14px;
    outline: none;
    transition: border-color 0.15s ease;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--accent);
}

textarea {
    min-height: 110px;
    resize: vertical;
}

.btn-row,
.task-actions,
.priority-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

button {
    border: none;
    border-radius: 14px;
    padding: 11px 16px;
    font-size: 14px;
    cursor: pointer;
    transition:
        transform 0.15s ease,
        opacity 0.15s ease,
        background 0.15s ease;
}

button:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    color: #001018;
    font-weight: bold;
}

.btn-secondary {
    background: #1e293b;
    color: var(--text);
    border: 1px solid rgba(148, 163, 184, 0.15);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.14);
    color: #fecaca;
    border: 1px solid rgba(239, 68, 68, 0.25);
}

.btn-ghost {
    background: transparent;
    color: var(--muted);
    border: 1px dashed rgba(148, 163, 184, 0.18);
}

.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 14px;
    margin-bottom: 18px;
}

.stat {
    padding: 18px;
    border-radius: 18px;
    background: #0b1220;
    border: 1px solid rgba(148, 163, 184, 0.14);
}

.stat .value {
    font-size: 30px;
    font-weight: bold;
    margin-top: 6px;
}

.task-list {
    display: grid;
    gap: 14px;
}

.task-card {
    background: #0b1220;
    border: 1px solid rgba(148, 163, 184, 0.12);
    border-radius: 18px;
    padding: 16px;
}

.task-top {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    align-items: start;
}

.task-top h4 {
    margin: 0 0 6px;
    font-size: 18px;
}

.meta-row,
.tag-list {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.meta {
    padding: 6px 10px;
    border-radius: 999px;
    background: rgba(148, 163, 184, 0.12);
    color: #cbd5e1;
    font-size: 12px;
}

.priority-low {
    border-left: 4px solid #22c55e;
}

.priority-medium {
    border-left: 4px solid #f59e0b;
}

.priority-high {
    border-left: 4px solid #ef4444;
}

.done {
    opacity: 0.7;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(56, 189, 248, 0.12);
    color: #bae6fd;
    border-radius: 999px;
    padding: 7px 10px;
    font-size: 12px;
}

.tag button {
    padding: 0;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.14);
    color: white;
    font-size: 12px;
}

.tag-input {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    padding: 10px;
    min-height: 52px;
    border-radius: 14px;
    border: 1px solid var(--line);
    background: #0b1220;
}

.tag-input input {
    flex: 1 1 150px;
    border: none;
    background: transparent;
    padding: 6px;
    min-width: 140px;
}

.priority-option {
    flex: 1;
    min-width: 80px;
    background: #0b1220;
    color: var(--muted);
    border: 1px solid rgba(148, 163, 184, 0.14);
}

.priority-option.active {
    color: white;
    border-color: rgba(56, 189, 248, 0.35);
    background: rgba(56, 189, 248, 0.14);
}

.empty {
    border: 1px dashed rgba(148, 163, 184, 0.18);
    border-radius: 18px;
    padding: 28px;
    text-align: center;
    color: var(--muted);
    background: rgba(11, 18, 32, 0.7);
}

.message {
    margin-bottom: 14px;
    border-radius: 14px;
    padding: 12px 14px;
    font-size: 14px;
}

.message.success {
    background: rgba(34, 197, 94, 0.12);
    color: #bbf7d0;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

.message.error {
    background: rgba(239, 68, 68, 0.12);
    color: #fecaca;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.footer-note {
    text-align: center;
    color: var(--muted);
    font-size: 13px;
    padding: 10px 0 40px;
}

@media (max-width: 930px) {
    .main-layout {
        grid-template-columns: 1fr;
    }

    .hero h2 {
        font-size: 32px;
    }

    .header-row {
        align-items: flex-start;
        flex-direction: column;
    }
}