/* CSS Variables for Telegram theming */
:root {
    --tg-bg-color: #ffffff;
    --tg-text-color: #000000;
    --tg-hint-color: #999999;
    --tg-button-color: #2481cc;
    --tg-button-text-color: #ffffff;
    --tg-secondary-bg-color: #f4f4f5;
    --tg-border-color: #e5e5e5;
    --tg-error-color: #e53e3e;
    --tg-success-color: #38a169;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--tg-bg-color);
    color: var(--tg-text-color);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    font-size: 16px;
    overflow-x: hidden;
}

/* Container */
.container {
    max-width: 100%;
    padding: 16px;
    margin: 0 auto;
    min-height: 100vh;
}

/* Title */
.title {
    font-size: 24px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 24px;
    color: var(--tg-text-color);
}

/* Form */
.form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Field */
.field {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Labels */
label {
    font-weight: 500;
    font-size: 16px;
    color: var(--tg-text-color);
}

/* Input styles */
.input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--tg-border-color);
    border-radius: 8px;
    font-size: 16px;
    background-color: var(--tg-secondary-bg-color);
    color: var(--tg-text-color);
    transition: border-color 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
}

.input:focus {
    outline: none;
    border-color: var(--tg-button-color);
    box-shadow: 0 0 0 3px rgba(36, 129, 204, 0.1);
}

.input::placeholder {
    color: var(--tg-hint-color);
}

/* Search container */
.search-container {
    position: relative;
}

/* Dropdown */
.dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--tg-secondary-bg-color);
    border: 1px solid var(--tg-border-color);
    border-radius: 8px;
    max-height: 200px;
    overflow-y: auto;
    z-index: 100;
    margin-top: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.dropdown-item {
    padding: 12px 16px;
    cursor: pointer;
    border-bottom: 1px solid var(--tg-border-color);
    transition: background-color 0.2s ease;
}

.dropdown-item:last-child {
    border-bottom: none;
}

.dropdown-item:hover:not(.disabled) {
    background-color: var(--tg-bg-color);
}

.dropdown-item.disabled {
    color: var(--tg-hint-color);
    cursor: default;
}

.group-name {
    font-weight: 500;
    color: var(--tg-text-color);
    margin-bottom: 2px;
}

.chat-id {
    font-size: 14px;
    color: var(--tg-hint-color);
}

/* Selected group */
.selected-group {
    padding: 12px 16px;
    background-color: var(--tg-secondary-bg-color);
    border: 1px solid var(--tg-button-color);
    border-radius: 8px;
    font-size: 14px;
    color: var(--tg-text-color);
}

/* Time list */
.time-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.time-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.time-input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--tg-border-color);
    border-radius: 8px;
    font-size: 16px;
    background-color: var(--tg-secondary-bg-color);
    color: var(--tg-text-color);
    -webkit-appearance: none;
    appearance: none;
}

.time-input:focus {
    outline: none;
    border-color: var(--tg-button-color);
    box-shadow: 0 0 0 3px rgba(36, 129, 204, 0.1);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    -webkit-appearance: none;
    appearance: none;
}

.btn-primary {
    background-color: var(--tg-button-color);
    color: var(--tg-button-text-color);
    border: 1px solid var(--tg-button-color);
}

.btn-primary:hover {
    background-color: #1a6ba0;
    border-color: #1a6ba0;
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-primary:disabled,
.btn-primary.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: var(--tg-hint-color);
    border-color: var(--tg-hint-color);
}

.btn-secondary {
    background-color: var(--tg-secondary-bg-color);
    color: var(--tg-button-color);
    border: 1px solid var(--tg-button-color);
}

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

.btn-secondary:active {
    transform: scale(0.98);
}

/* Remove button */
.remove-btn {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 50%;
    background-color: var(--tg-error-color);
    color: white;
    font-size: 20px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    appearance: none;
}

.remove-btn:hover {
    background-color: #c53030;
    transform: scale(1.05);
}

.remove-btn:active {
    transform: scale(0.95);
}

/* Messages */
.message {
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    margin-top: 16px;
}

.message.success {
    background-color: rgba(56, 161, 105, 0.1);
    color: var(--tg-success-color);
    border: 1px solid rgba(56, 161, 105, 0.2);
}

.message.error {
    background-color: rgba(229, 62, 62, 0.1);
    color: var(--tg-error-color);
    border: 1px solid rgba(229, 62, 62, 0.2);
}

/* Feature Flags */
.feature-flags {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 12px;
}

.feature-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--tg-border-color);
    border-radius: 4px;
    background-color: var(--tg-secondary-bg-color);
    cursor: pointer;
    position: relative;
    -webkit-appearance: none;
    appearance: none;
    transition: all 0.2s ease;
}

.feature-checkbox:checked {
    background-color: var(--tg-button-color);
    border-color: var(--tg-button-color);
}

.feature-checkbox:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 14px;
    font-weight: bold;
}

.feature-checkbox:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(36, 129, 204, 0.1);
}

.checkbox-item label {
    cursor: pointer;
    font-size: 16px;
    font-weight: 400;
}

/* Hidden utility */
.hidden {
    display: none !important;
}

/* Mobile optimizations */
@media (max-width: 480px) {
    .container {
        padding: 12px;
    }

    .title {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .form {
        gap: 16px;
    }

    .time-row {
        gap: 8px;
    }

    .remove-btn {
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}

/* Dark theme support */
@media (prefers-color-scheme: dark) {
    :root {
        --tg-bg-color: #212121;
        --tg-text-color: #ffffff;
        --tg-hint-color: #aaaaaa;
        --tg-secondary-bg-color: #181818;
        --tg-border-color: #333333;
    }
}

/* High contrast support */
@media (prefers-contrast: high) {
    .input,
    .time-input {
        border-width: 2px;
    }

    .btn {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
        animation: none !important;
    }
}

/* Touch targets */
@media (pointer: coarse) {
    .btn,
    .remove-btn,
    .dropdown-item {
        min-height: 44px;
    }

    .input,
    .time-input {
        min-height: 44px;
    }
}

/* Focus visible for keyboard navigation */
.btn:focus-visible,
.input:focus-visible,
.time-input:focus-visible,
.remove-btn:focus-visible {
    outline: 2px solid var(--tg-button-color);
    outline-offset: 2px;
}

/* Loading state */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Telegram-specific adjustments */
body.telegram-dark {
    --tg-bg-color: var(--tg-theme-bg-color, #212121);
    --tg-text-color: var(--tg-theme-text-color, #ffffff);
    --tg-hint-color: var(--tg-theme-hint-color, #aaaaaa);
    --tg-button-color: var(--tg-theme-button-color, #2481cc);
    --tg-button-text-color: var(--tg-theme-button-text-color, #ffffff);
    --tg-secondary-bg-color: var(--tg-theme-secondary-bg-color, #181818);
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Safe area insets for iOS */
@supports (padding: max(0px)) {
    .container {
        padding-left: max(16px, env(safe-area-inset-left));
        padding-right: max(16px, env(safe-area-inset-right));
        padding-bottom: max(16px, env(safe-area-inset-bottom));
    }
}