:root {
    --bg: #faf8f5;
    --bg-warm: #f5f0e8;
    --card: #ffffff;
    --card-border: rgba(0,0,0,0.06);
    --text: #1a1a2e;
    --text-secondary: #6b7280;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --green: #22c55e;
    --red: #ef4444;
    --orange: #f59e0b;
    --purple: #a855f7;
    --pink: #ec4899;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow: 0 2px 12px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
}

/* App Shell */
.app-shell {
    max-width: 480px;
    margin: 0 auto;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    position: relative;
    background: var(--bg);
}

/* Header */
.app-header {
    padding: 16px 20px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    background: var(--bg);
    z-index: 20;
}
.app-header .greeting { font-size: 13px; color: var(--text-secondary); }
.app-header .nudge-count { font-size: 22px; font-weight: 700; }
.header-actions { display: flex; gap: 10px; }
.header-btn {
    width: 38px; height: 38px; border-radius: 50%;
    border: 1px solid var(--card-border);
    background: var(--card); cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px; color: var(--text-secondary);
    transition: background 0.2s;
}
.header-btn:hover { background: var(--bg-warm); }

/* Search */
.search-bar {
    margin: 0 20px 12px;
    position: relative;
}
.search-bar input {
    width: 100%;
    padding: 10px 16px 10px 38px;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    background: var(--card);
    font-size: 14px;
    font-family: var(--font);
    outline: none;
    transition: border-color 0.2s;
}
.search-bar input:focus { border-color: var(--accent); }
.search-bar .search-icon {
    position: absolute; left: 12px; top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary); font-size: 14px;
}

/* Premium Banner */
.premium-banner {
    margin: 0 20px 16px;
    padding: 14px 16px;
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-radius: var(--radius-sm);
    display: flex; align-items: center; gap: 12px;
    cursor: pointer;
    transition: transform 0.2s;
}
.premium-banner:hover { transform: scale(1.01); }
.premium-banner .star { font-size: 20px; }
.premium-banner .text { flex: 1; }
.premium-banner .title { font-weight: 600; font-size: 14px; }
.premium-banner .sub { font-size: 12px; color: var(--text-secondary); }
.premium-banner .arrow { color: var(--text-secondary); }

/* Unsorted Warning */
.unsorted-bar {
    margin: 0 20px 12px;
    padding: 10px 14px;
    background: #fff7ed;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--orange);
    display: flex; align-items: center; gap: 8px;
}

/* Mode Header */
.mode-header {
    text-align: center;
    padding: 8px 20px 16px;
}
.mode-header h2 {
    font-size: 20px;
    font-weight: 700;
}
.mode-header .subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Content Area */
.app-content {
    flex: 1;
    padding: 0 20px 120px;
    overflow-y: auto;
}

/* Task List */
.task-list { display: flex; flex-direction: column; gap: 8px; }
.task-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--card-border);
    transition: transform 0.15s, box-shadow 0.15s;
}
.task-card:hover { box-shadow: var(--shadow); }
.task-card.completed { opacity: 0.5; }
.task-card.completed .task-title { text-decoration: line-through; }

.task-check {
    width: 28px; height: 28px; border-radius: 50%;
    border: 2px solid #d1d5db; background: none;
    cursor: pointer; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: 14px; color: transparent;
    transition: all 0.2s;
}
.task-check:hover { border-color: var(--green); color: var(--green); }
.task-check.checked { border-color: var(--green); background: var(--green); color: #fff; }

.task-info { flex: 1; min-width: 0; }
.task-title { font-size: 15px; font-weight: 500; }
.task-meta { display: flex; gap: 8px; margin-top: 4px; flex-wrap: wrap; }
.task-tag {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 20px;
    background: rgba(0,0,0,0.04);
    color: var(--text-secondary);
}
.task-tag.overdue { background: #fef2f2; color: var(--red); }
.task-pin {
    width: 28px; height: 28px;
    border: none; background: none;
    cursor: pointer; color: #d1d5db;
    font-size: 14px; flex-shrink: 0;
    transition: color 0.2s;
}
.task-pin.pinned { color: var(--orange); }
.task-pin:hover { color: var(--orange); }

.task-actions-btn {
    width: 28px; height: 28px;
    border: none; background: none;
    cursor: pointer; color: var(--text-secondary);
    font-size: 16px;
}

/* Surprise Me Button */
.surprise-btn {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    margin: 16px auto;
    padding: 14px 36px;
    background: linear-gradient(135deg, var(--purple), var(--pink));
    color: #fff; border: none; border-radius: 50px;
    font-size: 16px; font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(168,85,247,0.3);
    transition: transform 0.2s, box-shadow 0.2s;
    font-family: var(--font);
}
.surprise-btn:hover { transform: scale(1.03); box-shadow: 0 6px 24px rgba(168,85,247,0.4); }

/* Focus Mode */
.focus-card {
    text-align: center;
    padding: 32px 24px;
    background: var(--card);
    border-radius: var(--radius);
    border: 1px solid var(--card-border);
    box-shadow: var(--shadow-lg);
    margin: 20px 0;
}
.focus-card .focus-title { font-size: 22px; font-weight: 600; margin-bottom: 12px; }
.focus-card .focus-meta { display: flex; gap: 16px; justify-content: center; margin-bottom: 20px; }
.focus-timer {
    font-size: 48px; font-weight: 300;
    font-variant-numeric: tabular-nums;
    color: var(--accent);
    margin: 16px 0;
}
.focus-actions { display: flex; gap: 12px; justify-content: center; }

/* Context Filter Chips */
.context-chips {
    display: flex; gap: 8px; padding: 0 0 16px;
    overflow-x: auto; -webkit-overflow-scrolling: touch;
}
.context-chips::-webkit-scrollbar { display: none; }
.chip {
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--card-border);
    background: var(--card);
    font-size: 13px; font-weight: 500;
    cursor: pointer; white-space: nowrap;
    transition: all 0.2s;
    font-family: var(--font);
}
.chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.chip:hover:not(.active) { background: var(--bg-warm); }

/* Coach Mode */
.coach-card {
    text-align: center;
    padding: 28px 24px;
    background: var(--card);
    border-radius: var(--radius);
    border: 1px solid var(--card-border);
}
.coach-card h3 { font-size: 18px; margin-bottom: 12px; }
.coach-card p { color: var(--text-secondary); font-size: 14px; line-height: 1.6; }

/* Gamify Mode */
.score-ring-container { text-align: center; margin: 16px 0; }
.score-ring { position: relative; width: 160px; height: 160px; margin: 0 auto; }
.score-ring svg { transform: rotate(-90deg); }
.score-ring .ring-bg { fill: none; stroke: rgba(0,0,0,0.06); stroke-width: 12; }
.score-ring .ring-fill { fill: none; stroke-width: 12; stroke-linecap: round; transition: stroke-dashoffset 0.6s ease; }
.score-value {
    position: absolute; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}
.score-value .num { font-size: 42px; font-weight: 700; }
.score-value .of { font-size: 14px; color: var(--text-secondary); }

.stats-row {
    display: flex; gap: 16px; justify-content: center;
    padding: 16px;
    background: var(--card);
    border-radius: var(--radius-sm);
    border: 1px solid var(--card-border);
    margin: 16px 0;
}
.stat-item { text-align: center; flex: 1; }
.stat-item .stat-icon { font-size: 20px; margin-bottom: 4px; }
.stat-item .stat-val { font-size: 20px; font-weight: 700; }
.stat-item .stat-label { font-size: 11px; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 28px;
    border-radius: 50px;
    border: none;
    font-size: 15px; font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
    transition: transform 0.15s, box-shadow 0.15s;
}
.btn:hover { transform: scale(1.02); }
.btn-primary { background: var(--accent); color: #fff; }
.btn-green { background: var(--green); color: #fff; }
.btn-ghost { background: rgba(0,0,0,0.04); color: var(--text-secondary); }
.btn-orange { background: linear-gradient(135deg, var(--orange), #ef4444); color: #fff; }

/* Bottom Bar */
.bottom-bar {
    position: fixed; bottom: 0; left: 0; right: 0;
    background: var(--bg);
    border-top: 1px solid var(--card-border);
    z-index: 30;
    max-width: 480px;
    margin: 0 auto;
}
.mode-tabs {
    display: flex;
    padding: 8px 8px 0;
}
.mode-tab {
    flex: 1;
    padding: 8px 4px 12px;
    background: none; border: none;
    text-align: center;
    cursor: pointer;
    font-family: var(--font);
    transition: color 0.2s;
}
.mode-tab .tab-icon { font-size: 18px; margin-bottom: 2px; color: var(--text-secondary); }
.mode-tab .tab-label { font-size: 10px; color: var(--text-secondary); font-weight: 500; }
.mode-tab.active .tab-icon { color: var(--accent); }
.mode-tab.active .tab-label { color: var(--accent); }

.capture-bar {
    display: flex; gap: 8px;
    padding: 10px 12px;
}
.capture-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    background: var(--card);
    font-size: 14px;
    font-family: var(--font);
    outline: none;
}
.capture-input:focus { border-color: var(--accent); }
.capture-submit {
    padding: 12px 20px;
    background: var(--accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px; font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
    white-space: nowrap;
}
.capture-submit:hover { background: var(--accent-hover); }

/* Auth Screen */
.auth-screen {
    min-height: 100dvh;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    padding: 40px 24px;
    text-align: center;
    background: linear-gradient(180deg, #f5f0e8 0%, var(--bg) 100%);
}
.auth-screen .logo { font-size: 64px; margin-bottom: 16px; }
.auth-screen h1 { font-size: 28px; font-weight: 700; margin-bottom: 8px; }
.auth-screen .tagline { font-size: 16px; color: var(--text-secondary); margin-bottom: 40px; line-height: 1.5; }

.apple-signin-btn {
    display: flex; align-items: center; justify-content: center; gap: 10px;
    padding: 14px 32px;
    background: #000; color: #fff;
    border: none; border-radius: 12px;
    font-size: 16px; font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
    transition: opacity 0.2s;
    min-width: 280px;
}
.apple-signin-btn:hover { opacity: 0.85; }
.apple-signin-btn svg { width: 20px; height: 20px; }

.skip-link {
    margin-top: 20px;
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    border: none;
    background: none;
    font-family: var(--font);
    text-decoration: underline;
}

/* Settings Panel */
.settings-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 50;
    opacity: 0; pointer-events: none;
    transition: opacity 0.3s;
}
.settings-overlay.open { opacity: 1; pointer-events: all; }
.settings-panel {
    position: fixed; right: -100%; top: 0; bottom: 0;
    width: min(360px, 85vw);
    background: var(--bg);
    z-index: 51;
    padding: 24px;
    overflow-y: auto;
    transition: right 0.3s ease;
}
.settings-panel.open { right: 0; }
.settings-panel h2 { font-size: 20px; margin-bottom: 24px; }
.settings-group { margin-bottom: 24px; }
.settings-group label {
    display: flex; justify-content: space-between; align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--card-border);
    font-size: 14px;
}
.settings-close {
    position: absolute; top: 16px; right: 16px;
    width: 32px; height: 32px;
    border: none; background: rgba(0,0,0,0.06);
    border-radius: 50%; cursor: pointer;
    font-size: 18px;
    display: flex; align-items: center; justify-content: center;
}

/* Task Editor Modal */
.modal-overlay {
    position: fixed; inset: 0;
    background: rgba(0,0,0,0.4);
    z-index: 50;
    display: none;
    align-items: flex-end;
    justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal-content {
    background: var(--bg);
    border-radius: var(--radius) var(--radius) 0 0;
    padding: 24px;
    width: 100%;
    max-width: 480px;
    max-height: 80dvh;
    overflow-y: auto;
}
.modal-content h3 { font-size: 18px; margin-bottom: 20px; }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; color: var(--text-secondary); }
.form-group input, .form-group select {
    width: 100%; padding: 10px 14px;
    border: 1px solid var(--card-border);
    border-radius: var(--radius-sm);
    font-size: 14px; font-family: var(--font);
    background: var(--card);
}
.form-actions { display: flex; gap: 8px; justify-content: flex-end; margin-top: 20px; }

/* Nudges Left */
.nudges-left {
    text-align: center;
    padding: 16px;
}
.nudges-left .count { font-size: 24px; font-weight: 700; }
.nudges-left .label { font-size: 13px; color: var(--text-secondary); }

/* Animations */
@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
.fade-in { animation: fadeIn 0.3s ease; }

/* Responsive */
@media (min-width: 768px) {
    .app-shell { border-left: 1px solid var(--card-border); border-right: 1px solid var(--card-border); }
    .bottom-bar { left: 50%; transform: translateX(-50%); border-left: 1px solid var(--card-border); border-right: 1px solid var(--card-border); }
}