:root {
    --bg-color: #f0f4f8;
    --surface-color: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
    --primary-color: #3b82f6;
    --shadow-color: rgba(0, 0, 0, 0.05);
    
    /* Telegram theme vars */
    --tg-bg-color: var(--tg-theme-bg-color, var(--bg-color));
    --tg-surface-color: var(--tg-theme-secondary-bg-color, var(--surface-color));
    --tg-text-color: var(--tg-theme-text-color, var(--text-color));
    --tg-button-color: var(--tg-theme-button-color, var(--primary-color));
    --tg-button-text-color: var(--tg-theme-button-text-color, #ffffff);

    --color-bad: #ef4444;
    --color-normal: #f59e0b;
    --color-good: #10b981;
    --color-empty: var(--surface-color);
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--tg-bg-color);
    color: var(--tg-text-color);
    margin: 0;
    padding: 16px;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

#app {
    max-width: 500px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 20px;
    position: relative;
}

.download-btn {
    position: absolute;
    top: 0;
    right: 0;
    background: none;
    border: none;
    color: var(--tg-text-color);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s, transform 0.2s;
}

.theme-btn {
    position: absolute;
    top: 0;
    left: 0;
    background: none;
    border: none;
    color: var(--tg-text-color);
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    transition: background-color 0.2s, transform 0.2s;
}

.download-btn:hover, .theme-btn:hover {
    background-color: var(--border-color);
    transform: translateY(2px);
}

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

header p {
    font-size: 14px;
    color: #888;
    margin-top: 5px;
}

.app-version {
    margin-bottom: 10px;
    font-size: 12px;
    color: #64748b;
    text-align: center;
}

.calendar-container {
    background: var(--tg-surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 12px;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: all 0.3s ease;
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

.nav-btn {
    background: none;
    border: none;
    font-size: 20px;
    color: var(--tg-text-color);
    cursor: pointer;
    padding: 5px 10px;
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
    text-align: center;
}

.weekday {
    font-size: 11px;
    font-weight: bold;
    color: #888;
    margin-bottom: 4px;
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    background-color: var(--color-empty);
    border: 1px solid var(--border-color);
    transition: transform 0.1s;
}

.calendar-day.empty-day {
    background: transparent;
    border: none;
    cursor: default;
}

.calendar-day:not(.empty-day):active {
    transform: scale(0.95);
}

.calendar-day.selected {
    outline: 2px solid var(--tg-button-color);
}

.calendar-day.state-bad { background-color: var(--color-bad); color: white; border-color: var(--color-bad); }
.calendar-day.state-normal { background-color: var(--color-normal); color: white; border-color: var(--color-normal); }
.calendar-day.state-good { background-color: var(--color-good); color: white; border-color: var(--color-good); }

.daily-entry {
    margin-top: 16px;
    background: var(--tg-surface-color);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 12px;
    box-shadow: 0 4px 12px var(--shadow-color);
    transition: all 0.3s ease;
}

.state-selector, .medication-tracker {
    margin-bottom: 20px;
}

.state-buttons {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.state-btn {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--tg-surface-color);
    color: var(--tg-text-color);
    cursor: pointer;
    font-size: 16px;
    font-family: 'Outfit', sans-serif;
    transition: all 0.2s;
}

.emoji-btn {
    font-size: 28px;
    padding: 12px 10px;
    line-height: 1;
}

.state-btn.active[data-state="bad"] { background-color: var(--color-bad); color: white; border-color: var(--color-bad); }
.state-btn.active[data-state="normal"] { background-color: var(--color-normal); color: white; border-color: var(--color-normal); }
.state-btn.active[data-state="good"] { background-color: var(--color-good); color: white; border-color: var(--color-good); }

.toggle-switch {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.toggle-switch input {
    display: none;
}

.slider {
    width: 40px;
    height: 24px;
    background-color: #ccc;
    border-radius: 24px;
    position: relative;
    transition: .4s;
    margin-right: 10px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--tg-button-color);
}

input:checked + .slider:before {
    transform: translateX(16px);
}

input[type="text"] {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-sizing: border-box;
    font-size: 16px;
    font-family: 'Outfit', sans-serif;
    background: var(--tg-surface-color);
    color: var(--tg-text-color);
    transition: border-color 0.2s;
}

.primary-button {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    background-color: var(--tg-button-color);
    color: var(--tg-button-text-color);
    font-size: 16px;
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.2s, transform 0.1s;
}

.primary-button:active {
    opacity: 0.8;
}

.symptoms-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 10px;
}

.symptom-label {
    display: flex;
    align-items: center;
    background: var(--tg-surface-color);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 14px;
    cursor: pointer;
    user-select: none;
    transition: all 0.2s;
    gap: 6px;
}

.symptom-label input {
    display: none;
}

.symptom-label:has(input:checked) {
    background: var(--tg-button-color);
    color: var(--tg-button-text-color);
    border-color: var(--tg-button-color);
}

.delete-item-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-left: 2px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.05);
    color: inherit;
    font-size: 16px;
    line-height: 1;
    cursor: pointer;
    transition: background 0.2s;
    z-index: 5;
    position: relative;
}

.delete-item-btn:hover {
    background: rgba(0, 0, 0, 0.2);
}

.dark-theme .delete-item-btn {
    background: rgba(255, 255, 255, 0.1);
}

.dark-theme .delete-item-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.secondary-button {
    padding: 8px 16px;
    border: 1px solid var(--tg-button-color);
    border-radius: 8px;
    background-color: transparent;
    color: var(--tg-button-color);
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.2s;
}

.secondary-button:active {
    background-color: var(--tg-button-color);
    color: var(--tg-button-text-color);
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-color: #0f172a;
        --surface-color: #1e293b;
        --text-color: #f8fafc;
        --border-color: #334155;
        --shadow-color: rgba(0, 0, 0, 0.3);
        --color-empty: var(--surface-color);
    }
}

/* Manual Theme overrides */
body.dark-theme {
    --bg-color: #0f172a;
    --surface-color: #1e293b;
    --text-color: #f8fafc;
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.3);
    --color-empty: var(--surface-color);

    --tg-bg-color: var(--bg-color);
    --tg-surface-color: var(--surface-color);
    --tg-text-color: var(--text-color);
}

body.light-theme {
    --bg-color: #f0f4f8;
    --surface-color: #ffffff;
    --text-color: #1e293b;
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.05);
    --color-empty: var(--surface-color);

    --tg-bg-color: var(--bg-color);
    --tg-surface-color: var(--surface-color);
    --tg-text-color: var(--text-color);
}