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

:root {
    --bg-color: var(--tg-theme-bg-color, #ffffff);
    --text-color: var(--tg-theme-text-color, #000000);
    --hint-color: var(--tg-theme-hint-color, #999999);
    --secondary-bg: var(--tg-theme-secondary-bg-color, #f5f5f5);
    --button-color: var(--tg-theme-button-color, #3390ec);
    --button-text: var(--tg-theme-button-text-color, #ffffff);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    padding: 16px;
}

.container {
    max-width: 400px;
    margin: 0 auto;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 24px;
}

.header h1 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.header p {
    font-size: 14px;
    color: var(--hint-color);
}

/* Form */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-color);
}

.form-group textarea {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    border: 1px solid var(--hint-color);
    border-radius: 12px;
    font-size: 16px;
    resize: vertical;
    background-color: var(--secondary-bg);
    color: var(--text-color);
    transition: border-color 0.2s;
}

.form-group textarea:focus {
    outline: none;
    border-color: var(--button-color);
}

.form-group textarea::placeholder {
    color: var(--hint-color);
}

/* Date/Time Row */
.datetime-row {
    display: flex;
    gap: 12px;
}

.datetime-row .form-group {
    flex: 1;
}

.form-group input[type="date"],
.form-group input[type="time"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--hint-color);
    border-radius: 12px;
    font-size: 16px;
    background-color: var(--secondary-bg);
    color: var(--text-color);
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--button-color);
}

/* Quick Time Buttons */
.quick-times {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 12px;
}

.quick-time-btn {
    padding: 8px 14px;
    border: none;
    border-radius: 20px;
    font-size: 13px;
    background-color: var(--secondary-bg);
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.2s;
}

.quick-time-btn:hover,
.quick-time-btn:active {
    background-color: var(--button-color);
    color: var(--button-text);
}

/* Submit Button */
.submit-btn {
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    background-color: var(--button-color);
    color: var(--button-text);
    cursor: pointer;
    transition: opacity 0.2s;
    margin-top: 8px;
}

.submit-btn:hover {
    opacity: 0.9;
}

.submit-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Status Message */
.status {
    text-align: center;
    margin-top: 16px;
    padding: 12px;
    border-radius: 12px;
    font-size: 14px;
    display: none;
}

.status.success {
    display: block;
    background-color: rgba(52, 199, 89, 0.1);
    color: #34c759;
}

.status.error {
    display: block;
    background-color: rgba(255, 59, 48, 0.1);
    color: #ff3b30;
}

/* Reminders List */
.reminders-list {
    margin-top: 32px;
}

.reminders-list h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
}

.reminder-item {
    background-color: var(--secondary-bg);
    padding: 14px;
    border-radius: 12px;
    margin-bottom: 10px;
    position: relative;
}

.reminder-item .message {
    font-size: 15px;
    margin-bottom: 6px;
    padding-right: 30px;
}

.reminder-item .time {
    font-size: 13px;
    color: var(--hint-color);
}

.reminder-item .delete-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    border: none;
    background: none;
    color: var(--hint-color);
    cursor: pointer;
    font-size: 18px;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.reminder-item .delete-btn:hover {
    opacity: 1;
    color: #ff3b30;
}

.no-reminders {
    text-align: center;
    color: var(--hint-color);
    font-size: 14px;
    padding: 20px;
}

/* Loading spinner */
.loading {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--button-text);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 0.8s linear infinite;
    margin-right: 8px;
    vertical-align: middle;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}