/* Life Reminder - Modern GTD UI */

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

:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #eef2ff;
    --bg: #f8fafc;
    --sidebar-bg: #0f172a;
    --sidebar-text: #cbd5e1;
    --sidebar-active: #6366f1;
    --card: #ffffff;
    --text: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: 150ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    display: flex;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ===== Login ===== */
.login-overlay {
    display: flex;
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15,23,42,0.6);
    backdrop-filter: blur(8px);
    z-index: 9999;
    justify-content: center; align-items: center;
}
.login-overlay.hidden { display: none; }
.login-card {
    background: var(--card); border-radius: var(--radius-xl); padding: 40px;
    max-width: 380px; width: 90%; text-align: center;
    box-shadow: var(--shadow-lg);
}
.login-icon { margin-bottom: 16px; color: var(--primary); }
.login-icon svg { width: 48px; height: 48px; }
.login-card h2 { font-size: 22px; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.login-card p { color: var(--text-secondary); margin-bottom: 20px; font-size: 14px; }
.login-card input {
    width: 100%; padding: 12px 16px; border: 1.5px solid var(--border); border-radius: var(--radius);
    font-size: 15px; margin-bottom: 14px; transition: border-color var(--transition);
}
.login-card input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.1); }

/* ===== Sidebar ===== */
.sidebar {
    width: 260px; background: var(--sidebar-bg); color: var(--sidebar-text);
    padding: 24px 0; position: fixed; height: 100vh; overflow-y: auto; z-index: 100;
}
.logo { padding: 0 24px 24px; border-bottom: 1px solid rgba(255,255,255,0.06); margin-bottom: 12px; }
.logo h1 { font-size: 20px; font-weight: 700; color: #fff; letter-spacing: -0.3px; }
.logo p { font-size: 12px; color: rgba(255,255,255,0.4); margin-top: 2px; }

.nav-item {
    width: 100%; padding: 10px 24px; background: none; border: none;
    color: var(--sidebar-text); text-align: left; cursor: pointer;
    display: flex; align-items: center; gap: 12px; font-size: 14px;
    transition: all var(--transition); border-radius: 0;
}
.nav-item svg { width: 18px; height: 18px; flex-shrink: 0; stroke-width: 1.75; }
.nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.nav-item.active { background: var(--sidebar-active); color: #fff; }
.nav-item .count {
    margin-left: auto; background: rgba(255,255,255,0.15); padding: 1px 8px;
    border-radius: 10px; font-size: 12px; font-weight: 500;
}
.nav-divider { height: 1px; background: rgba(255,255,255,0.06); margin: 12px 24px; }

/* ===== Main ===== */
.main {
    margin-left: 260px; flex: 1; padding: 32px 48px;
    width: calc(100% - 260px); max-width: 960px;
}

/* ===== Quick Input ===== */
.quick-input-container {
    background: var(--card); border-radius: var(--radius-lg); padding: 20px;
    margin-bottom: 24px; box-shadow: var(--shadow-sm); border: 1px solid var(--border);
    display: flex; flex-direction: column; gap: 12px;
}
.quick-input-top { position: relative; }
.input-icon-float {
    position: absolute; top: 14px; left: 14px; color: var(--text-muted);
    width: 20px; height: 20px; pointer-events: none; z-index: 1;
}
.quick-input-top svg.input-icon-float { width: 20px; height: 20px; }
#quick-input {
    width: 100%; padding: 14px 16px 14px 44px; border: 1.5px solid var(--border);
    border-radius: var(--radius-lg); font-size: 15px; line-height: 1.6;
    transition: all var(--transition); background: var(--bg);
    resize: vertical; min-height: 80px; max-height: 200px;
    font-family: inherit;
}
#quick-input:focus {
    outline: none; border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.08); background: #fff;
}
#quick-input::placeholder { color: var(--text-muted); }
.quick-input-bottom {
    display: flex; justify-content: space-between; align-items: center;
}
.quick-input-hint {
    display: flex; align-items: center; gap: 6px;
    font-size: 12px; color: var(--text-muted);
}
.quick-input-actions { display: flex; gap: 8px; }

/* ===== Buttons ===== */
.btn {
    padding: 8px 16px; border: none; border-radius: var(--radius); font-size: 13px;
    font-weight: 500; cursor: pointer; transition: all var(--transition);
    display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
    line-height: 1.5;
}
.btn svg { width: 16px; height: 16px; stroke-width: 2; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--text-secondary); }
.btn-ghost:hover { background: var(--bg); color: var(--text); }
.btn-danger-outline { background: transparent; color: var(--danger); border: 1.5px solid var(--danger); }
.btn-danger-outline:hover { background: var(--danger); color: #fff; }
.btn-block { width: 100%; justify-content: center; padding: 12px; }
.btn-sm { padding: 6px 10px; font-size: 12px; }
.btn-sm svg { width: 14px; height: 14px; }
.btn-timer-stop { background: rgba(255,255,255,0.15); color: #fff; border: 1px solid rgba(255,255,255,0.25); }
.btn-timer-stop:hover { background: rgba(255,255,255,0.25); }

/* ===== Timer ===== */
.timer-container {
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    border-radius: var(--radius-lg); padding: 24px; margin-bottom: 24px;
    color: #fff; box-shadow: var(--shadow-md);
}
.timer-display { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.timer-info { display: flex; align-items: center; gap: 10px; }
.timer-icon { width: 22px; height: 22px; opacity: 0.8; }
.timer-task { font-size: 16px; font-weight: 500; }
.timer-time { font-size: 40px; font-weight: 700; font-family: 'SF Mono', 'Fira Code', monospace; letter-spacing: 2px; }
.timer-actions { margin-top: 16px; display: flex; gap: 8px; justify-content: flex-end; }

/* ===== Task List ===== */
.task-list { display: flex; flex-direction: column; gap: 8px; }

.task-card {
    background: var(--card); border-radius: var(--radius-lg); padding: 16px 20px;
    border: 1px solid var(--border); transition: all var(--transition); cursor: pointer;
}
.task-card:hover { border-color: var(--primary); box-shadow: var(--shadow); transform: translateY(-1px); }
.task-card.completed { opacity: 0.6; }

.task-header { display: flex; align-items: flex-start; gap: 12px; }
.task-checkbox {
    width: 20px; height: 20px; cursor: pointer; flex-shrink: 0; margin-top: 2px;
    accent-color: var(--primary); border-radius: 4px;
}
.task-title { font-size: 15px; font-weight: 500; flex: 1; color: var(--text); line-height: 1.5; }
.task-card.completed .task-title { text-decoration: line-through; color: var(--text-muted); }

.task-description {
    color: var(--text-secondary); font-size: 13px; margin-top: 6px; line-height: 1.5;
    padding-left: 32px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.task-meta { display: flex; gap: 8px; margin-top: 10px; padding-left: 32px; flex-wrap: wrap; align-items: center; }

.task-tag {
    padding: 2px 10px; border-radius: 100px; font-size: 11px; font-weight: 500; letter-spacing: 0.2px;
}
.task-tag.status-inbox { background: #eff6ff; color: #3b82f6; }
.task-tag.status-next { background: #f0fdf4; color: #16a34a; }
.task-tag.status-waiting { background: #fffbeb; color: #d97706; }
.task-tag.status-someday { background: #faf5ff; color: #9333ea; }
.task-tag.completed { background: #f0fdf4; color: #16a34a; }
.task-date { font-size: 12px; color: var(--text-muted); display: flex; align-items: center; gap: 4px; }
.task-date svg { width: 13px; height: 13px; }

.task-actions { display: flex; gap: 6px; margin-top: 10px; padding-left: 32px; align-items: center; flex-wrap: wrap; }

.task-action-btn {
    padding: 5px 10px; border-radius: var(--radius); border: 1px solid var(--border);
    background: var(--card); cursor: pointer; display: inline-flex; align-items: center;
    gap: 4px; font-size: 12px; font-weight: 500; color: var(--text-secondary);
    transition: all var(--transition); white-space: nowrap;
}
.task-action-btn svg { width: 14px; height: 14px; stroke-width: 1.75; }
.task-action-btn:hover { background: var(--primary); border-color: var(--primary); color: #fff; }
.task-action-btn.btn-danger-action { color: var(--danger); }
.task-action-btn.btn-danger-action:hover { background: var(--danger); border-color: var(--danger); color: #fff; }

.task-status-select {
    padding: 5px 10px; border-radius: var(--radius); border: 1px solid var(--border);
    background: var(--card); font-size: 12px; font-weight: 500; color: var(--text-secondary);
    cursor: pointer; transition: all var(--transition); outline: none;
}
.task-status-select:hover { border-color: var(--primary); }
.task-status-select:focus { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(99,102,241,0.1); }

/* ===== Empty State ===== */
.empty-state { text-align: center; padding: 80px 20px; color: var(--text-muted); }
.empty-state-icon { margin-bottom: 16px; color: var(--text-muted); }
.empty-state-icon svg { width: 64px; height: 64px; stroke-width: 1; }
.empty-state h3 { font-size: 18px; color: var(--text-secondary); margin-bottom: 6px; font-weight: 600; }
.empty-state p { font-size: 14px; }

/* ===== Stats ===== */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }
.stat-card {
    background: var(--card); padding: 24px; border-radius: var(--radius-lg);
    border: 1px solid var(--border); text-align: center; transition: all var(--transition);
}
.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-icon { margin-bottom: 12px; color: var(--primary); }
.stat-icon svg { width: 28px; height: 28px; stroke-width: 1.5; }
.stat-value { font-size: 36px; font-weight: 700; color: var(--text); margin-bottom: 4px; line-height: 1; }
.stat-label { color: var(--text-muted); font-size: 13px; font-weight: 500; }

/* ===== Settings ===== */
.settings-section {
    background: var(--card); border-radius: var(--radius-lg); padding: 24px;
    border: 1px solid var(--border);
}
.settings-section h3 { font-size: 16px; margin-bottom: 16px; color: var(--text); font-weight: 600; }

/* ===== Modal ===== */
.modal {
    display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%;
    background: rgba(15,23,42,0.5); backdrop-filter: blur(4px);
}
.modal.show { display: flex; justify-content: center; align-items: center; }
.modal-content {
    background: var(--card); border-radius: var(--radius-xl); width: 90%; max-width: 540px;
    box-shadow: var(--shadow-lg); animation: modalIn 200ms ease-out;
}
@keyframes modalIn { from { transform: translateY(16px) scale(0.98); opacity: 0; } to { transform: none; opacity: 1; } }

.modal-header {
    padding: 20px 24px; border-bottom: 1px solid var(--border);
    display: flex; justify-content: space-between; align-items: center;
}
.modal-header h2 { font-size: 18px; font-weight: 600; }
.modal-close-btn {
    background: none; border: none; color: var(--text-muted); cursor: pointer;
    width: 32px; height: 32px; display: flex; align-items: center; justify-content: center;
    border-radius: var(--radius); transition: all var(--transition);
}
.modal-close-btn:hover { background: var(--bg); color: var(--text); }
.modal-close-btn svg { width: 20px; height: 20px; }
.modal-body { padding: 24px; }
.modal-footer { padding: 16px 24px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; }

/* ===== Forms ===== */
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 13px; color: var(--text-secondary); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.input, .form-group input, .form-group textarea, .form-group select {
    width: 100%; padding: 10px 14px; border: 1.5px solid var(--border); border-radius: var(--radius);
    font-size: 14px; font-family: inherit; transition: all var(--transition); background: var(--bg);
}
.input:focus, .form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(99,102,241,0.08); background: #fff;
}
.form-group textarea { resize: vertical; min-height: 80px; }
.form-group select { cursor: pointer; }

/* ===== Toast ===== */
.toast {
    position: fixed; bottom: 24px; right: 24px; padding: 12px 20px;
    border-radius: var(--radius); box-shadow: var(--shadow-lg); z-index: 2000;
    font-size: 14px; font-weight: 500; color: #fff;
    animation: toastIn 300ms ease-out;
}
@keyframes toastIn { from { transform: translateY(16px); opacity: 0; } to { transform: none; opacity: 1; } }
.toast.success { background: var(--success); }
.toast.error { background: var(--danger); }
.toast.warning { background: var(--warning); color: var(--text); }

/* ===== Hamburger ===== */
.menu-toggle {
    display: none; position: fixed; top: 16px; left: 16px; z-index: 1000;
    width: 40px; height: 40px; border-radius: var(--radius); background: var(--sidebar-bg);
    color: #fff; border: none; cursor: pointer; align-items: center; justify-content: center;
    box-shadow: var(--shadow); transition: all var(--transition);
}
.menu-toggle svg { width: 20px; height: 20px; }
.menu-toggle:hover { background: var(--primary); }

.sidebar-overlay {
    display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.4); z-index: 99; opacity: 0; transition: opacity 300ms;
}
.sidebar-overlay.show { display: block; opacity: 1; }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .menu-toggle { display: flex; }
    .sidebar { width: 280px; transform: translateX(-100%); transition: transform 300ms ease; box-shadow: var(--shadow-lg); }
    .sidebar.mobile-open { transform: translateX(0); }
    .main { margin-left: 0; padding: 56px 16px 16px; width: 100%; }
    .quick-input-container { flex-wrap: wrap; padding: 14px; }
    .quick-input-wrapper { width: 100%; }
    .timer-time { font-size: 28px; }
    .timer-display { flex-direction: column; align-items: flex-start; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .task-actions { gap: 4px; }
    .task-action-btn { padding: 4px 8px; font-size: 11px; }
    .form-row { grid-template-columns: 1fr; }
    .modal-content { width: 95%; }
    .toast { left: 16px; right: 16px; bottom: 16px; }
}
@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .task-description { padding-left: 32px; }
    .task-meta, .task-actions { padding-left: 32px; }
}