:root {
    --color-bg-start: #0f172a;
    --color-bg-mid: #1e293b;
    --color-bg-end: #162a2c;

    --color-frost-surface: rgba(224, 242, 254, 0.06);
    --color-frost-surface-hover: rgba(224, 242, 254, 0.12);
    --color-frost-border: rgba(186, 230, 253, 0.18);
    --color-frost-border-active: rgba(153, 209, 189, 0.5);

    --color-text-main: #f0f9ff;
    --color-text-muted: #cbd5e1;
    --color-text-dim: #7d93a8;

    --color-accent-blue: #7dd3fc;
    --color-accent-blue-soft: #bae6fd;
    --color-accent-sage: #94d3a2;
    --color-accent-sage-soft: #bbf7d0;
    --color-accent-glow: rgba(148, 211, 162, 0.25);

    --color-danger: #f87171;
    --color-danger-bg: rgba(248, 113, 113, 0.15);

    --mood-cozy: #f97316;
    --mood-calm: #7dd3fc;
    --mood-serene: #94d3a2;
    --mood-gloomy: #818cf8;
    --mood-joyful: #fde047;

    --font-family-main: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.75rem;

    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-full: 9999px;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    --shadow-glass: 0 4px 12px rgba(0, 0, 0, 0.08);
    --blur-glass: blur(16px);
}

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

html {
    min-height: 100%;
    background-color: var(--color-bg-start);
}

body {
    font-family: var(--font-family-main);
    background-color: var(--color-bg-start);
    color: var(--color-text-main);
    min-height: 100vh;
    min-height: 100svh;
    display: block;
    padding:
        calc(2rem + env(safe-area-inset-top))
        calc(1rem + env(safe-area-inset-right))
        calc(2rem + env(safe-area-inset-bottom))
        calc(1rem + env(safe-area-inset-left));
}

.app-container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.app-header {
    text-align: center;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.brand__icon {
    font-size: var(--font-size-xl);
}

.brand__title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(180deg, 
        var(--color-accent-blue-soft) 0%, 
        var(--color-accent-sage) 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.brand__subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: 0.25rem;
}

.app-main {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: stretch;
    gap: 1.5rem;
}

@media (max-width: 900px) {
    .app-main {
        grid-template-columns: 1fr;
    }
}

.panel {
    background: var(--color-frost-surface);
    backdrop-filter: var(--blur-glass);
    -webkit-backdrop-filter: var(--blur-glass);
    border: 1px solid var(--color-frost-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-glass);
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.details-panel {
    gap: 1rem;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.calendar-header__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-accent-blue-soft);
}

.btn-icon {
    background: var(--color-frost-surface);
    border: 1px solid var(--color-frost-border);
    color: var(--color-text-main);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-icon:hover {
    background: var(--color-frost-surface-hover);
    border-color: var(--color-accent-sage);
    }

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    text-align: center;
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.weekday.weekend {
    color: var(--color-danger);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 0.5rem;
}

.calendar-day {
    aspect-ratio: 1;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.2rem;
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: var(--transition-fast);
    position: relative;
}

.calendar-day:hover {
    background: var(--color-frost-surface-hover);
    border-color: var(--color-frost-border);
}

.calendar-day--empty {
    background: transparent;
    cursor: default;
}

.calendar-day--selected {
    border-color: var(--color-accent-sage);
    background: rgba(148, 211, 162, 0.12);
}

.calendar-day--today::before {
    content: '';
    position: absolute;
    top: 5px;
    right: 5px;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background-color: var(--color-accent-sage);
}

.calendar-day__emoji {
    font-size: 1.1rem;
    line-height: 1;
}

.quote-card {
    margin-top: auto;
    padding: 1rem;
    background: rgba(15, 23, 42, 0.4);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-accent-sage);
}

.quote-card__text {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-style: italic;
    line-height: 1.5;
}

.quote-card__author {
    display: block;
    font-size: 0.7rem;
    color: var(--color-accent-sage);
    margin-top: 0.4rem;
    text-align: right;
}

.date-badge {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
}

.date-badge__info {
    min-width: 0;
}

.date-badge__image {
    width: clamp(72px, 26%, 112px);
    aspect-ratio: 1;
    object-fit: contain;
    flex: 0 0 auto;
    border-radius: var(--radius-md);
    background: #f8f5ec;
}

.date-badge__label {
    font-size: var(--font-size-xs);
    color: var(--color-text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.date-badge__value {
    font-size: var(--font-size-md);
    font-weight: 600;
    color: var(--color-accent-sage-soft);
    margin-top: 0.2rem;
}

.section-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
}

.mood-options {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.5rem;
}

.mood-btn {
    background: var(--color-frost-surface);
    border: 1px solid var(--color-frost-border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.25rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    cursor: pointer;
    transition: var(--transition-fast);
    color: var(--color-text-muted);
}

.mood-btn:hover {
    background: var(--color-frost-surface-hover);
    color: var(--color-text-main);
    border-color: var(--color-accent-blue);
}

.mood-btn--active {
    border-color: var(--color-accent-sage);
    background: rgba(148, 211, 162, 0.15);
    color: var(--color-text-main);
}

.mood-btn__emoji {
    font-size: 1.25rem;
}

.mood-btn__label {
    font-size: var(--font-size-xs);
}

.diary-textarea {
    width: 100%;
    height: 84px;
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--color-frost-border);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    color: var(--color-text-main);
    font-family: inherit;
    font-size: var(--font-size-sm);
    resize: none;
    transition: var(--transition-fast);
}

.diary-textarea::placeholder {
    color: rgba(203, 213, 225, 0.45);
    font-size: var(--font-size-xs);
}

.diary-textarea:focus {
    outline: none;
    border-color: var(--color-accent-sage);
}

@media (max-width: 900px) {
    .diary-textarea {
        font-size: 16px;
    }
}

.action-bar {
    display: flex;
    gap: 0.5rem;
}

.btn {
    flex: 1;
    padding: 0.75rem;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    border: none;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-accent-blue), var(--color-accent-sage));
    color: #0f172a;
}

.btn--primary:hover {
    opacity: 0.92;
}

.btn--secondary {
    background: var(--color-frost-surface);
    color: var(--color-text-main);
    border: 1px solid var(--color-frost-border);
}

.btn--secondary:hover {
    background: var(--color-frost-surface-hover);
    border-color: var(--color-accent-sage);
}

.btn--danger {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid rgba(248, 113, 113, 0.3);
}

.btn--danger:hover {
    background: rgba(248, 113, 113, 0.25);
}

.saved-notes-section {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.saved-notes-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.saved-notes-empty {
    color: var(--color-text-dim);
    font-size: var(--font-size-xs);
}

.saved-note {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.45rem;
    padding: 0.65rem;
    background: rgba(15, 23, 42, 0.18);
    border: 1px solid rgba(186, 230, 253, 0.1);
    border-radius: var(--radius-sm);
}

.saved-note__text {
    width: 100%;
    color: var(--color-text-main);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.saved-note__editor {
    height: 72px;
}

.saved-note__actions {
    display: flex;
    justify-content: flex-end;
    gap: 0.35rem;
    width: auto;
}

.saved-note__button {
    flex: 0 0 auto;
    min-width: 0;
    min-height: 1.7rem;
    padding: 0.25rem 0.5rem;
    font-size: var(--font-size-xs);
    line-height: 1;
}

.saved-note__button[aria-label="Cancel editing"],
.saved-note__button[aria-label="Delete entry"] {
    width: 1.7rem;
    padding: 0;
    font-size: var(--font-size-sm);
}

.hidden {
    display: none !important;
}

.stats-section {
    margin-top: 0.75rem;
    border-top: 1px solid rgba(186, 230, 253, 0.08);
    padding-top: 1.5rem;
}

.stats-section__title {
    font-size: var(--font-size-xs);
    color: var(--color-text-dim);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stats-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.stat-pill {
    background: rgba(15, 23, 42, 0.4);
    border-radius: var(--radius-full);
    padding: 0.25rem 0.65rem;
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    border: 1px solid var(--color-frost-border);
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.app-footer {
    width: 100%;
    flex: 0 0 auto;
    text-align: center;
    padding: 1.5rem 0 0.5rem;
    border-top: 1px solid var(--color-frost-border);
    margin-top: 1rem;
}

.app-footer__text {
    font-size: var(--font-size-xs);
    color: var(--color-text-dim);
    letter-spacing: 0.03em;
    }