/**
 * Mobile UI components: buttons, chips, bottom sheets, modals.
 */

.m-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--m-space-sm);
    min-height: var(--m-touch-min);
    padding: 0 var(--m-space-lg);
    border-radius: var(--m-radius-md);
    font-family: var(--font-primary);
    font-size: var(--m-font-body);
    font-weight: 600;
    border: none;
    cursor: pointer;
    box-sizing: border-box;
    width: 100%;
}

.m-btn--primary {
    background: var(--tg-accent);
    color: #fff;
}

.m-btn--secondary {
    background: var(--tg-bg-card);
    color: var(--tg-accent);
    border: 1px solid rgba(82, 160, 255, 0.35);
}

.m-segment {
    display: flex;
    background: var(--tg-bg-input);
    border: 1px solid var(--tg-border-light);
    border-radius: var(--m-radius-md);
    padding: 3px;
    gap: 3px;
}

.m-segment__btn {
    flex: 1;
    min-height: 36px;
    border: none;
    border-radius: calc(var(--m-radius-md) - 3px);
    background: transparent;
    font-family: var(--font-primary);
    font-size: var(--m-font-meta);
    font-weight: 600;
    color: var(--tg-text-secondary);
    cursor: pointer;
}

.m-segment__btn.is-active {
    background: var(--tg-bg-card);
    color: var(--tg-accent);
    box-shadow: var(--m-shadow-card);
}

.m-bottom-sheet {
    position: fixed;
    inset: 0;
    z-index: 10050;
    pointer-events: none;
    visibility: hidden;
}

.m-bottom-sheet.is-open {
    pointer-events: auto;
    visibility: visible;
}

.m-bottom-sheet__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.m-bottom-sheet.is-open .m-bottom-sheet__backdrop {
    opacity: 1;
}

.m-bottom-sheet__panel {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    max-height: 90vh;
    max-height: 90dvh;
    background: var(--tg-bg-card);
    border-radius: var(--m-radius-xl) var(--m-radius-xl) 0 0;
    padding: var(--m-space-md) var(--m-space-lg) calc(var(--m-space-2xl) + var(--m-safe-bottom));
    transform: translateY(100%);
    transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 -8px 32px rgba(15, 23, 42, 0.12);
    overflow-y: auto;
}

.m-bottom-sheet.is-open .m-bottom-sheet__panel {
    transform: translateY(0);
}

.m-bottom-sheet__handle {
    width: 36px;
    height: 4px;
    background: var(--tg-border);
    border-radius: 2px;
    margin: 0 auto var(--m-space-md);
}

.m-bottom-sheet__title {
    font-size: 18px;
    font-weight: 700;
    margin: 0 0 var(--m-space-lg);
    color: var(--tg-text-primary);
}

/* Email verification modal — styles in css/email-verification-modal.css */