:root {
    color-scheme: light;
    --background: #f5f6f8;
    --surface: rgba(255, 255, 255, 0.85);
    --surface-strong: rgba(255, 255, 255, 0.95);
    --border: rgba(15, 23, 42, 0.08);
    --primary-text: #111827;
    --secondary-text: rgba(17, 24, 39, 0.64);
    --accent: #2d67ff;
    --accent-soft: rgba(45, 103, 255, 0.12);
    --danger: #ef4444;
    --shadow: 0 24px 45px rgba(15, 23, 42, 0.08);
    --radius-large: 28px;
    --radius-medium: 20px;
    --radius-small: 12px;
    --transition: 180ms ease;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    font-family: 'Inter', 'SF Pro Display', 'SF Pro Text', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: radial-gradient(circle at 50% -20%, rgba(255, 255, 255, 0.9), transparent 55%), var(--background);
    color: var(--primary-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    display: flex;
    justify-content: center;
    padding: clamp(32px, 4vw, 64px) clamp(16px, 6vw, 72px);
}

.app {
    width: min(700px, 100%);
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(28px);
    border-radius: var(--radius-large);
    border: 1px solid rgba(255, 255, 255, 0.6);
    box-shadow: var(--shadow);
    padding: clamp(32px, 5vw, 56px);
    display: flex;
    flex-direction: column;
    gap: clamp(28px, 5vw, 48px);
}

.app-header {
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.eyebrow {
    font-size: 0.85rem;
    letter-spacing: 0.24em;
    text-transform: uppercase;
    color: var(--accent);
    margin: 0;
}

.app-header h1 {
    margin: 0;
    font-size: clamp(2rem, 5vw, 2.8rem);
    font-weight: 600;
    letter-spacing: -0.02em;
}

.subheading {
    margin: 0;
    color: var(--secondary-text);
    font-size: 1.05rem;
}

main {
    display: flex;
    flex-direction: column;
    gap: clamp(24px, 4vw, 40px);
}

section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.mood-card,
.progress-card,
.tasks-section {
    background: var(--surface);
    border-radius: var(--radius-medium);
    border: 1px solid rgba(255, 255, 255, 0.6);
    padding: clamp(20px, 4vw, 28px);
    box-shadow: 0 10px 25px rgba(15, 23, 42, 0.04);
}

.mood-card h2,
.tasks-section h2,
.progress-card h2 {
    margin: 0 0 12px;
    font-size: 1.4rem;
    font-weight: 600;
}

.mood-controls {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.mood-controls label {
    font-weight: 500;
}

.mood-control-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

select,
input[type="text"],
input[type="search"] {
    flex: 1;
    min-width: 180px;
    padding: 12px 16px;
    border-radius: var(--radius-small);
    border: 1px solid rgba(15, 23, 42, 0.12);
    background: var(--surface-strong);
    font-size: 1rem;
    transition: border var(--transition), box-shadow var(--transition);
    color: var(--primary-text);
}

select:focus,
input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--accent-soft);
}

.ghost-button,
.primary-button {
    border-radius: var(--radius-small);
    font-size: 1rem;
    padding: 12px 20px;
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    border: 1px solid transparent;
    align-self: flex-start;
}

.ghost-button {
    background: rgba(255, 255, 255, 0.7);
    border-color: rgba(17, 24, 39, 0.08);
    color: var(--primary-text);
}

.ghost-button:hover,
.ghost-button:focus-visible {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-1px);
}

.primary-button {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 15px 35px rgba(45, 103, 255, 0.25);
}

.primary-button:hover,
.primary-button:focus-visible {
    transform: translateY(-1px);
    box-shadow: 0 18px 40px rgba(45, 103, 255, 0.32);
}

.help-text {
    margin: 0;
    color: var(--secondary-text);
    font-size: 0.9rem;
}

.prediction-section {
    display: flex;
}

.prediction-card {
    width: 100%;
    background: linear-gradient(140deg, rgba(45, 103, 255, 0.12), rgba(45, 103, 255, 0.04));
    border-radius: var(--radius-medium);
    padding: clamp(24px, 5vw, 36px);
    border: 1px solid rgba(45, 103, 255, 0.18);
    min-height: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--primary-text);
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 220ms ease, transform 220ms ease;
}

.prediction-card .prediction-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.prediction-card .prediction-task {
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.prediction-card .prediction-note {
    margin-top: 12px;
    color: var(--secondary-text);
}

.prediction-card.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.tasks-header {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.task-search input {
    width: 100%;
}

.task-form {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.task-form-inner {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.task-form-inner input {
    flex: 1;
}

.task-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.task-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface-strong);
    border-radius: var(--radius-small);
    border: 1px solid rgba(15, 23, 42, 0.08);
    padding: 14px 18px;
    gap: 16px;
    transition: border var(--transition), transform var(--transition);
}

.task-item--empty {
    justify-content: center;
    color: var(--secondary-text);
    font-style: italic;
    pointer-events: none;
}

.task-item:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

.task-item label {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
    cursor: pointer;
}

.task-checkbox {
    width: 18px;
    height: 18px;
    border-radius: 6px;
    border: 1px solid rgba(15, 23, 42, 0.15);
    accent-color: var(--accent);
}

.task-title {
    font-size: 1rem;
    font-weight: 500;
}

.task-item.completed .task-title {
    text-decoration: line-through;
    color: var(--secondary-text);
}

.task-delete {
    border: none;
    background: transparent;
    color: rgba(17, 24, 39, 0.4);
    cursor: pointer;
    font-size: 1.4rem;
    line-height: 1;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    transition: background var(--transition), color var(--transition);
}

.task-delete:hover,
.task-delete:focus-visible {
    background: rgba(17, 24, 39, 0.08);
    color: var(--danger);
    outline: none;
}

.progress-card {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.progress-count {
    margin: 0;
    font-weight: 600;
    color: var(--accent);
}

.dot-graph {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 12px;
    justify-content: center;
}

.dot-graph li {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: rgba(45, 103, 255, 0.16);
    transition: transform 220ms cubic-bezier(0.18, 0.89, 0.32, 1.28), background var(--transition);
    transform: scale(0.92);
}

.dot-graph li.is-filled {
    background: var(--accent);
    transform: scale(1.12);
}

.app-footer {
    text-align: center;
    color: var(--secondary-text);
    font-size: 0.85rem;
}

.noscript-message {
    margin-bottom: 16px;
    padding: 12px 16px;
    border-radius: var(--radius-small);
    background: #fde68a;
    color: #854d0e;
    text-align: center;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 600px) {
    body {
        padding: 24px 16px;
    }

    .app {
        padding: 28px 24px;
    }

    .mood-control-row,
    .task-form-inner {
        flex-direction: column;
        align-items: stretch;
    }

    .ghost-button,
    .primary-button {
        width: 100%;
    }

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

    .dot-graph {
        justify-content: flex-start;
    }
}