:root {
    --tg-theme-bg-color: #ffffff;
    --tg-theme-text-color: #000000;
    --tg-theme-button-color: #007AFF;
    --tg-theme-button-text-color: #ffffff;
    --picker-item-height: 36px;
    --visible-items: 5;
}

body {
    font-family: 'Vazirmatn', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 20px;
    background-color: var(--tg-theme-bg-color);
    color: var(--tg-theme-text-color);
    -webkit-font-smoothing: antialiased;
}

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

.picker-container.bottom-sheet {
    position: fixed;
    bottom: -100%;
    left: 0;
    right: 0;
    background: #fff;
    border-radius: 14px 14px 0 0;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
    transition: bottom 0.3s ease-out;
    z-index: 1000;
    max-width: none;
    margin: 0;
}

.picker-container.bottom-sheet.expanded {
    bottom: 0;
}

.bottom-sheet-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease;
    z-index: 999;
    pointer-events: none;
}

.picker-container.bottom-sheet.expanded .bottom-sheet-overlay {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}



.fab {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 56px;
    height: 56px;
    border-radius: 28px;
    background: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    font-size: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: transform 0.2s;
    z-index: 998;
}

.fab:active {
    transform: translateX(-50%) scale(0.95);
}

.picker-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}

.picker-header h2 {
    margin: 0;
    font-size: 18px;
    font-weight: 500;
}

.close-button {
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    padding: 5px;
    transition: transform 0.3s;
}

.picker-content {
    padding: 20px;
    max-height: 400px;
}

.picker-container.expanded .picker-content {
    max-height: 400px;
}

.picker-container.expanded .close-button {
    transform: rotate(180deg);
}

.date-picker {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    height: calc(var(--picker-item-height) * var(--visible-items));
}

.scroll-picker {
    flex: 1;
    position: relative;
    height: 100%;
    overflow: hidden;
    user-select: none;
}

.scroll-picker-items {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    transition: transform 0.2s;
}

.scroll-picker-item {
    height: var(--picker-item-height);
    line-height: var(--picker-item-height);
    text-align: center;
    font-size: 16px;
    color: var(--tg-theme-text-color);
    transition: all 0.2s;
}

.scroll-picker-mask {
    position: absolute;
    left: 0;
    right: 0;
    height: calc(var(--picker-item-height) * 2);
    pointer-events: none;
    background: linear-gradient(to bottom, rgba(255,255,255,0.95), rgba(255,255,255,0));
    z-index: 2;
}

.scroll-picker-mask.top {
    top: 0;
}

.scroll-picker-mask.bottom {
    bottom: 0;
    transform: rotate(180deg);
}

.scroll-picker-highlight {
    position: absolute;
    top: 50%;
    left: 10px;
    right: 10px;
    height: var(--picker-item-height);
    transform: translateY(-50%);
    background: rgba(0,0,0,0.05);
    border-radius: 8px;
    pointer-events: none;
    z-index: 1;
}

.button {
    background-color: var(--tg-theme-button-color);
    color: var(--tg-theme-button-text-color);
    border: none;
    border-radius: 10px;
    padding: 12px;
    width: 100%;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: opacity 0.2s;
    font-family: inherit;
}

.button:active {
    opacity: 0.8;
}

.title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
    text-align: center;
}

.input-field {
    margin-bottom: 20px;
}

.input-field input {
    width: 100%;
    padding: 12px;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 10px;
    font-size: 16px;
    font-family: inherit;
    box-sizing: border-box;
}

.birthdays-list-container {
    margin-top: 30px;
}

.birthdays-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    text-align: center;
}

.birthdays-list {
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    overflow: hidden;
}

.birthday-item {
    padding: 15px 20px;
    border-bottom: 1px solid rgba(0,0,0,0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.birthday-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.countdown-tag {
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
}

.countdown-soon {
    background-color: #ff4d4f;
    color: white;
}

.countdown-near {
    background-color: #faad14;
    color: white;
}

.countdown-far {
    background-color: #52c41a;
    color: white;
}

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

.birthday-name {
    font-weight: 500;
}

.birthday-date {
    color: var(--tg-theme-button-color);
}