/* ═══════════════════════════════════════════════════════════════
   AI-СМЕТА — CHAT INTERFACE STYLES
   Kuvalda+ Design System
   ═══════════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────────────────────
   CSS VARIABLES (local, extends Kuvalda+ tokens)
   ───────────────────────────────────────────────────────────── */

:root {
    /* AI-smeta specific tokens */
    --ai-chat-max-width: 600px;
    --ai-header-height: 56px;
    --ai-input-area-min: 64px;
    --ai-bubble-radius: 14px;
    --ai-bubble-max-width: 85%;
    --ai-transition-fast: 150ms ease;
    --ai-transition-normal: 250ms ease;
    --ai-transition-slow: 350ms ease;
}


/* ─────────────────────────────────────────────────────────────
   PAGE LAYOUT
   ───────────────────────────────────────────────────────────── */

.ai-smeta-page {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans, 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--foreground, #0a0a0a);
    background: var(--background, #ffffff);
    height: 100vh;
    height: 100dvh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
}

.ai-smeta-content {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    position: relative;
    max-width: var(--ai-chat-max-width);
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
    padding-top: var(--ai-header-height);
}


/* ─────────────────────────────────────────────────────────────
   WELCOME SCREEN
   ───────────────────────────────────────────────────────────── */

.ai-smeta-welcome {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 24px 20px;
    text-align: center;
    opacity: 1;
    transition: opacity var(--ai-transition-normal);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.ai-smeta-welcome.is-hiding {
    opacity: 0;
}

/* Icon */
.ai-smeta-welcome__icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: var(--muted, #f4f4f5);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary, #f97316);
}

.ai-smeta-welcome__icon svg {
    width: 28px;
    height: 28px;
}

/* Title */
.ai-smeta-welcome__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
    margin: 0 0 8px;
    letter-spacing: -0.01em;
}

/* Description */
.ai-smeta-welcome__desc {
    font-size: 0.875rem;
    line-height: 1.55;
    color: var(--muted-foreground, #71717a);
    margin: 0 0 28px;
    max-width: 340px;
}

/* Example buttons */
.ai-smeta-welcome__examples {
    display: flex;
    flex-direction: column;
    gap: 8px;
    width: 100%;
    max-width: 380px;
}

.ai-smeta-welcome__example-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 14px 16px;
    background: var(--background, #ffffff);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: 12px;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--foreground, #0a0a0a);
    text-align: left;
    cursor: pointer;
    transition:
        background var(--ai-transition-fast),
        border-color var(--ai-transition-fast),
        box-shadow var(--ai-transition-fast);
    line-height: 1.4;
    -webkit-tap-highlight-color: transparent;
}

.ai-smeta-welcome__example-btn:hover {
    background: var(--muted, #f4f4f5);
    border-color: #d4d4d8;
}

.ai-smeta-welcome__example-btn:active {
    background: #ebebed;
}

.ai-smeta-welcome__example-icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--muted, #f4f4f5);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted-foreground, #71717a);
}

.ai-smeta-welcome__example-icon svg {
    width: 18px;
    height: 18px;
}

/* Counter badge */
.ai-smeta-welcome__counter {
    margin-top: 20px;
    font-size: 0.8125rem;
    color: var(--muted-foreground, #71717a);
}

.ai-smeta-welcome__counter strong {
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
}


/* ─────────────────────────────────────────────────────────────
   UNFINISHED SESSION BLOCK
   ───────────────────────────────────────────────────────────── */

.ai-smeta-unfinished {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 24px 20px;
    text-align: center;
}

.ai-smeta-unfinished__icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: #fff7ed;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary, #f97316);
}

.ai-smeta-unfinished__icon svg {
    width: 28px;
    height: 28px;
}

.ai-smeta-unfinished__title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
    margin: 0 0 8px;
}

.ai-smeta-unfinished__desc {
    font-size: 0.875rem;
    color: var(--muted-foreground, #71717a);
    margin: 0 0 24px;
    max-width: 320px;
}

.ai-smeta-unfinished__actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 300px;
}

.ai-smeta-unfinished__btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 48px;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition:
        background var(--ai-transition-fast),
        transform var(--ai-transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.ai-smeta-unfinished__btn:active {
    transform: scale(0.98);
}

.ai-smeta-unfinished__btn--primary {
    background: var(--primary, #f97316);
    color: var(--primary-foreground, #ffffff);
}

.ai-smeta-unfinished__btn--primary:hover {
    background: var(--primary-hover, #ea580c);
}

.ai-smeta-unfinished__btn--ghost {
    background: transparent;
    color: var(--muted-foreground, #71717a);
    border: 1px solid var(--border, #e4e4e7);
}

.ai-smeta-unfinished__btn--ghost:hover {
    background: var(--muted, #f4f4f5);
}


/* ─────────────────────────────────────────────────────────────
   CHAT CONTAINER
   ───────────────────────────────────────────────────────────── */

.ai-smeta-chat {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    transition: opacity var(--ai-transition-normal);
}

.ai-smeta-chat.is-visible {
    opacity: 1;
}


/* ─────────────────────────────────────────────────────────────
   PROGRESS BAR
   ───────────────────────────────────────────────────────────── */

.ai-smeta-progress {
    flex-shrink: 0;
    padding: 12px 20px 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.ai-smeta-progress__track {
    flex: 1;
    height: 3px;
    background: var(--border, #e4e4e7);
    border-radius: 2px;
    overflow: hidden;
}

.ai-smeta-progress__fill {
    height: 100%;
    background: var(--primary, #f97316);
    border-radius: 2px;
    width: 0%;
    transition: width var(--ai-transition-slow);
}

.ai-smeta-progress__label {
    flex-shrink: 0;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--muted-foreground, #71717a);
    white-space: nowrap;
}


/* ─────────────────────────────────────────────────────────────
   MESSAGES AREA
   ───────────────────────────────────────────────────────────── */

.ai-smeta-messages {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: 8px 16px 16px;
    -webkit-overflow-scrolling: touch;
    scroll-behavior: smooth;
}

/* Single message wrapper */
.ai-smeta-msg {
    display: flex;
    margin-bottom: 6px;
    opacity: 0;
    transform: translateY(8px);
    animation: aiSmetaMsgIn var(--ai-transition-normal) forwards;
}

@keyframes aiSmetaMsgIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Delay for natural feel */
.ai-smeta-msg--delayed {
    animation-delay: 80ms;
}


/* ─────────────────────────────────────────────────────────────
   AI BUBBLE (left)
   ───────────────────────────────────────────────────────────── */

.ai-smeta-msg--ai {
    justify-content: flex-start;
}

.ai-smeta-bubble--ai {
    background: var(--muted, #f4f4f5);
    color: var(--foreground, #0a0a0a);
    border-radius: var(--ai-bubble-radius) var(--ai-bubble-radius) var(--ai-bubble-radius) 3px;
    padding: 10px 14px;
    max-width: var(--ai-bubble-max-width);
    font-size: 0.9375rem;
    line-height: 1.5;
    word-break: break-word;
}


/* ─────────────────────────────────────────────────────────────
   USER BUBBLE (right)
   ───────────────────────────────────────────────────────────── */

.ai-smeta-msg--user {
    justify-content: flex-end;
}

.ai-smeta-bubble--user {
    background: var(--primary, #f97316);
    color: var(--primary-foreground, #ffffff);
    border-radius: var(--ai-bubble-radius) var(--ai-bubble-radius) 3px var(--ai-bubble-radius);
    padding: 10px 14px;
    max-width: var(--ai-bubble-max-width);
    font-size: 0.9375rem;
    line-height: 1.5;
    word-break: break-word;
}


/* ─────────────────────────────────────────────────────────────
   TYPING INDICATOR
   ───────────────────────────────────────────────────────────── */

.ai-smeta-typing {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 12px 16px;
    background: var(--muted, #f4f4f5);
    border-radius: var(--ai-bubble-radius) var(--ai-bubble-radius) var(--ai-bubble-radius) 3px;
    width: fit-content;
}

.ai-smeta-typing__dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: #a1a1aa;
    animation: aiSmetaTypingPulse 1.4s ease-in-out infinite;
}

.ai-smeta-typing__dot:nth-child(2) {
    animation-delay: 0.2s;
}

.ai-smeta-typing__dot:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes aiSmetaTypingPulse {
    0%, 60%, 100% {
        opacity: 0.3;
        transform: scale(0.85);
    }
    30% {
        opacity: 1;
        transform: scale(1);
    }
}


/* ─────────────────────────────────────────────────────────────
   QUICK ACTIONS
   ───────────────────────────────────────────────────────────── */

.ai-smeta-quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 0 4px;
    margin-left: 2px;
    opacity: 0;
    transform: translateY(6px);
    animation: aiSmetaMsgIn var(--ai-transition-normal) 100ms forwards;
}

.ai-smeta-quick-action {
    display: inline-flex;
    align-items: center;
    height: 38px;
    padding: 0 16px;
    background: var(--background, #ffffff);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: 9999px;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--foreground, #0a0a0a);
    cursor: pointer;
    white-space: nowrap;
    transition:
        background var(--ai-transition-fast),
        border-color var(--ai-transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.ai-smeta-quick-action:hover {
    background: var(--muted, #f4f4f5);
    border-color: #d4d4d8;
}

.ai-smeta-quick-action:active {
    background: #ebebed;
}


/* ─────────────────────────────────────────────────────────────
   SMART INPUT CONFIRM CARD
   ───────────────────────────────────────────────────────────── */

.ai-smeta-confirm-card {
    width: min(100%, 520px);
    box-sizing: border-box;
    background: var(--background, #ffffff);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: 8px;
    padding: 14px;
    margin: 4px 0 8px 2px;
    color: var(--foreground, #0a0a0a);
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
    opacity: 0;
    transform: translateY(6px);
    animation: aiSmetaMsgIn var(--ai-transition-normal) 100ms forwards;
}

.ai-smeta-confirm-card__title {
    font-size: 0.9375rem;
    line-height: 1.35;
    font-weight: 600;
    margin-bottom: 10px;
}

.ai-smeta-confirm-card__section {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.ai-smeta-confirm-card__section + .ai-smeta-confirm-card__section {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border, #e4e4e7);
}

.ai-smeta-confirm-card__section--notice {
    color: #854d0e;
}

.ai-smeta-confirm-card__section--muted {
    color: var(--muted-foreground, #71717a);
}

.ai-smeta-confirm-card__section--warning {
    color: #991b1b;
}

.ai-smeta-confirm-card__subtitle {
    font-size: 0.8125rem;
    font-weight: 600;
    line-height: 1.35;
}

.ai-smeta-confirm-card__row {
    display: grid;
    grid-template-columns: minmax(120px, 0.8fr) minmax(0, 1.2fr);
    gap: 10px;
    align-items: baseline;
    font-size: 0.875rem;
    line-height: 1.4;
}

.ai-smeta-confirm-card__label {
    color: var(--muted-foreground, #71717a);
}

.ai-smeta-confirm-card__value {
    font-weight: 500;
    overflow-wrap: anywhere;
}

.ai-smeta-confirm-card__note {
    font-size: 0.8125rem;
    line-height: 1.45;
    overflow-wrap: anywhere;
}


/* ─────────────────────────────────────────────────────────────
   ERROR MESSAGE
   ───────────────────────────────────────────────────────────── */

.ai-smeta-error-content {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ai-smeta-error-content__text {
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--foreground, #0a0a0a);
}

.ai-smeta-error-content__retry {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--background, #ffffff);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: 8px;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--foreground, #0a0a0a);
    cursor: pointer;
    align-self: flex-start;
    transition: background var(--ai-transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.ai-smeta-error-content__retry:hover {
    background: var(--muted, #f4f4f5);
}

.ai-smeta-error-content__retry svg {
    width: 14px;
    height: 14px;
}


/* ─────────────────────────────────────────────────────────────
   INPUT AREA
   ───────────────────────────────────────────────────────────── */

.ai-smeta-input-area {
    flex-shrink: 0;
    border-top: 1px solid var(--border, #e4e4e7);
    background: var(--background, #ffffff);
    padding: 10px 16px;
    padding-bottom: max(10px, env(safe-area-inset-bottom));
    max-width: var(--ai-chat-max-width);
    width: 100%;
    margin: 0 auto;
    box-sizing: border-box;
}

.ai-smeta-input-wrap {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    background: var(--muted, #f4f4f5);
    border-radius: 22px;
    padding: 6px 6px 6px 16px;
    transition: box-shadow var(--ai-transition-fast);
}

.ai-smeta-input-wrap:focus-within {
    box-shadow: 0 0 0 2px rgba(249, 115, 22, 0.2);
}

.ai-smeta-input__field {
    flex: 1;
    border: none;
    background: transparent;
    font-family: inherit;
    font-size: 0.9375rem;
    line-height: 1.4;
    color: var(--foreground, #0a0a0a);
    resize: none;
    outline: none;
    padding: 6px 0;
    max-height: 96px; /* ~4 lines */
    overflow-y: auto;
}

.ai-smeta-input__field::placeholder {
    color: #a1a1aa;
}

.ai-smeta-input__field:disabled {
    opacity: 0.5;
}

.ai-smeta-input__send {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--primary, #f97316);
    color: var(--primary-foreground, #ffffff);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition:
        background var(--ai-transition-fast),
        opacity var(--ai-transition-fast),
        transform var(--ai-transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.ai-smeta-input__send:hover:not(:disabled) {
    background: var(--primary-hover, #ea580c);
}

.ai-smeta-input__send:active:not(:disabled) {
    transform: scale(0.93);
}

.ai-smeta-input__send:disabled {
    background: #d4d4d8;
    cursor: default;
    opacity: 0.6;
}

.ai-smeta-input__send svg {
    width: 20px;
    height: 20px;
}


/* ─────────────────────────────────────────────────────────────
   RESPONSIVE — DESKTOP
   ───────────────────────────────────────────────────────────── */

@media (min-width: 640px) {
    .ai-smeta-page::before,
    .ai-smeta-page::after {
        content: '';
        position: fixed;
        top: 0;
        bottom: 0;
        width: 1px;
        background: var(--border, #e4e4e7);
        pointer-events: none;
        z-index: 0;
    }

    .ai-smeta-page::before {
        left: calc(50% - (var(--ai-chat-max-width) / 2));
    }

    .ai-smeta-page::after {
        left: calc(50% + (var(--ai-chat-max-width) / 2));
    }

    .ai-smeta-content,
    .ai-smeta-input-area,
    .calculator-header {
        position: relative;
        z-index: 1;
    }

    .ai-smeta-content {
        border-left: none;
        border-right: none;
        padding-top: 0;
    }

    .ai-smeta-input-area {
        border-left: 1px solid var(--border, #e4e4e7);
        border-right: none;
    }

    .ai-smeta-messages {
        padding: 12px 20px 20px;
    }
}


/* ─────────────────────────────────────────────────────────────
   RESPONSIVE — SMALL SCREENS
   ───────────────────────────────────────────────────────────── */

@media (max-width: 359px) {
    .ai-smeta-welcome {
        padding: 20px 16px;
    }

    .ai-smeta-welcome__examples {
        gap: 6px;
    }

    .ai-smeta-welcome__example-btn {
        padding: 12px 14px;
        font-size: 0.8125rem;
    }

    .ai-smeta-quick-action {
        height: 36px;
        padding: 0 12px;
        font-size: 0.75rem;
    }
}


/* ─────────────────────────────────────────────────────────────
   ESTIMATE CARD
   Accent: blue (#2563eb) for calculation/data UI
   ───────────────────────────────────────────────────────────── */

:root {
    --ai-accent: #2563eb;
    --ai-accent-hover: #1d4ed8;
    --confidence-high: #16a34a;
    --confidence-medium: #6b7280;
    --confidence-low: #d97706;
}


/* --- Card wrapper in chat flow --- */

.ai-smeta-msg--estimate {
    justify-content: stretch;
    width: 100%;
}

.ai-smeta-estimate-card {
    background: var(--background, #ffffff);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: 14px;
    box-shadow: var(--shadow-sm, 0 1px 2px 0 rgb(0 0 0 / 0.05));
    padding: 16px;
    width: 100%;
    box-sizing: border-box;
    overflow: hidden;
}


/* --- Title --- */

.ai-est__title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
    padding-bottom: 12px;
    margin-bottom: 4px;
    border-bottom: 1px solid var(--border, #e4e4e7);
    line-height: 1.35;
}


/* ─────────────────────────────────────────────────────────────
   SECTIONS (collapsible)
   ───────────────────────────────────────────────────────────── */

.ai-est__section {
    border-bottom: 1px solid var(--border, #e4e4e7);
}

.ai-est__section:last-of-type {
    border-bottom: none;
}

.ai-est__section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 12px 0;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    min-height: 44px;
    box-sizing: border-box;
}

.ai-est__section-name {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--ai-accent);
    flex: 1;
    min-width: 0;
}

.ai-est__section-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-shrink: 0;
}

.ai-est__section-sum {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--muted-foreground, #71717a);
    white-space: nowrap;
}

/* Chevron icon */
.ai-smeta-chevron {
    flex-shrink: 0;
    transition: transform 200ms ease;
    color: var(--muted-foreground, #71717a);
}

.ai-est__section .ai-smeta-chevron {
    transform: rotate(-90deg);
}

.ai-est__section.is-open .ai-est__section-header .ai-smeta-chevron {
    transform: rotate(0deg);
}

/* Section body — collapsible */
.ai-est__section-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 200ms ease;
}

.ai-est__section.is-open .ai-est__section-body {
    max-height: 5000px; /* large enough for any content */
}

/* Section total */
.ai-est__section-total {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--ai-accent);
    padding: 10px 0 4px;
    margin-top: 4px;
    border-top: 1px solid var(--border, #e4e4e7);
    text-align: right;
}


/* ─────────────────────────────────────────────────────────────
   WORK ROW
   ───────────────────────────────────────────────────────────── */

.ai-est__work {
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f2;
}

.ai-est__work:last-child {
    border-bottom: none;
}

.ai-est__work-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--foreground, #0a0a0a);
    line-height: 1.4;
    display: flex;
    align-items: flex-start;
    gap: 6px;
    flex-wrap: wrap;
}

.ai-est__work-meta {
    font-size: 0.75rem;
    color: var(--muted-foreground, #71717a);
    margin-top: 3px;
    line-height: 1.5;
}

.ai-est__work-total {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--ai-accent);
    margin-top: 4px;
    text-align: right;
}


/* --- Confidence badge --- */

.ai-est__confidence {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 5px;
}

.ai-est__confidence--high {
    background: var(--confidence-high);
}

.ai-est__confidence--medium {
    background: var(--confidence-medium);
}

.ai-est__confidence--low {
    background: var(--confidence-low);
}


/* --- User override mark --- */

.ai-est__user-mark {
    font-size: 0.6875rem;
    font-weight: 400;
    color: var(--muted-foreground, #71717a);
    background: var(--muted, #f4f4f5);
    padding: 1px 6px;
    border-radius: 4px;
    white-space: nowrap;
    align-self: center;
}


/* --- qty_note --- */

.ai-est__qty-note {
    color: #a1a1aa;
    font-style: normal;
}


/* ─────────────────────────────────────────────────────────────
   MATERIALS TOGGLE + BLOCK
   ───────────────────────────────────────────────────────────── */

.ai-est__materials-toggle {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--ai-accent);
    margin-top: 6px;
    cursor: pointer;
    padding: 4px 0;
    min-height: 32px;
    -webkit-tap-highlight-color: transparent;
}

.ai-est__materials-toggle .ai-smeta-chevron {
    transform: rotate(-90deg);
    width: 12px;
    height: 12px;
    color: var(--ai-accent);
}

.ai-est__materials-toggle.is-open .ai-smeta-chevron {
    transform: rotate(0deg);
}

.ai-est__materials-toggle svg:first-child {
    width: 14px;
    height: 14px;
}

/* Materials body — collapsible */
.ai-est__materials-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 180ms ease;
    margin-left: 14px;
    border-left: 2px solid #e8edf5;
    padding-left: 12px;
}

.ai-est__materials-body.is-open {
    max-height: 2000px;
    margin-top: 6px;
    margin-bottom: 4px;
}


/* --- Material row --- */

.ai-est__material {
    padding: 6px 0;
    border-bottom: 1px solid #f5f5f7;
}

.ai-est__material:last-child {
    border-bottom: none;
}

.ai-est__material-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--foreground, #0a0a0a);
    display: flex;
    align-items: flex-start;
    gap: 5px;
    line-height: 1.4;
}

.ai-est__material-name .ai-est__confidence {
    width: 6px;
    height: 6px;
    margin-top: 5px;
}

.ai-est__material-meta {
    font-size: 0.6875rem;
    color: var(--muted-foreground, #71717a);
    margin-top: 2px;
}

.ai-est__material-prices {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 8px;
    margin-top: 2px;
    font-size: 0.6875rem;
}

.ai-est__material-unit-price {
    color: var(--muted-foreground, #71717a);
}

.ai-est__material-total {
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
    text-align: right;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}


/* ─────────────────────────────────────────────────────────────
   ASSUMPTIONS (collapsible)
   ───────────────────────────────────────────────────────────── */

.ai-est__assumptions {
    margin-top: 12px;
    background: var(--muted, #f4f4f5);
    border-radius: 10px;
    overflow: hidden;
}

.ai-est__assumptions-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--foreground, #0a0a0a);
    cursor: pointer;
    min-height: 44px;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

.ai-est__assumptions-header .ai-smeta-chevron {
    transform: rotate(-90deg);
}

.ai-est__assumptions.is-open .ai-est__assumptions-header .ai-smeta-chevron {
    transform: rotate(0deg);
}

.ai-est__assumptions-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 180ms ease;
}

.ai-est__assumptions.is-open .ai-est__assumptions-body {
    max-height: 600px;
}

.ai-est__assumption-item {
    font-size: 0.8125rem;
    color: var(--muted-foreground, #71717a);
    padding: 4px 14px;
    line-height: 1.5;
}

.ai-est__assumption-item:last-child {
    padding-bottom: 12px;
}


/* ─────────────────────────────────────────────────────────────
   COEFFICIENTS
   ───────────────────────────────────────────────────────────── */

.ai-est__coefficients {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border, #e4e4e7);
}

.ai-est__coef-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px 16px;
}

.ai-est__coef-item {
    display: flex;
    flex-direction: column;
    font-size: 0.75rem;
    padding: 4px 0;
}

.ai-est__coef-label {
    color: var(--muted-foreground, #71717a);
    font-weight: 400;
}

.ai-est__coef-value {
    color: var(--muted-foreground, #71717a);
    font-weight: 400;
}

.ai-est__coef-item.is-active .ai-est__coef-value {
    color: var(--foreground, #0a0a0a);
    font-weight: 600;
}

.ai-est__coef-total {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
    margin-top: 8px;
    padding-top: 6px;
    border-top: 1px solid var(--border, #e4e4e7);
}


/* ─────────────────────────────────────────────────────────────
   TOTALS
   ───────────────────────────────────────────────────────────── */

.ai-est__totals {
    margin-top: 16px;
    background: #eff6ff;
    border-radius: 10px;
    padding: 14px 16px;
}

.ai-est__totals-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 3px 0;
    font-size: 0.8125rem;
    font-variant-numeric: tabular-nums;
}

.ai-est__totals-label {
    color: var(--muted-foreground, #71717a);
    font-weight: 400;
}

.ai-est__totals-value {
    color: var(--foreground, #0a0a0a);
    font-weight: 500;
    text-align: right;
    white-space: nowrap;
}

.ai-est__totals-divider {
    height: 1px;
    background: #c7d8f0;
    margin: 6px 0;
}

.ai-est__totals-row--grand {
    padding: 4px 0;
}

.ai-est__totals-row--grand .ai-est__totals-label {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--ai-accent);
}

.ai-est__totals-row--grand .ai-est__totals-value {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--ai-accent);
}

.ai-est__totals-row--prepay {
    padding-top: 6px;
}

.ai-est__totals-row--prepay .ai-est__totals-label {
    color: var(--muted-foreground, #71717a);
}

.ai-est__totals-row--prepay .ai-est__totals-value {
    color: var(--muted-foreground, #71717a);
}


/* --- Disclaimer --- */

.ai-est__disclaimer {
    font-size: 0.75rem;
    color: var(--muted-foreground, #71717a);
    padding-top: 12px;
    line-height: 1.5;
}


/* ─────────────────────────────────────────────────────────────
   CONFIRMATION BUTTONS
   ───────────────────────────────────────────────────────────── */

.ai-smeta-msg--actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 4px 0;
    opacity: 0;
    transform: translateY(8px);
    animation: aiSmetaMsgIn var(--ai-transition-normal, 250ms ease) forwards;
    animation-delay: 100ms;
}

.ai-smeta-confirm-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 44px;
    padding: 0 20px;
    border-radius: 9999px;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition:
        background var(--ai-transition-fast, 150ms ease),
        transform var(--ai-transition-fast, 150ms ease);
    -webkit-tap-highlight-color: transparent;
    white-space: nowrap;
}

.ai-smeta-confirm-btn:active {
    transform: scale(0.97);
}

.ai-smeta-confirm-btn--primary {
    background: var(--primary, #f97316);
    color: var(--primary-foreground, #ffffff);
}

.ai-smeta-confirm-btn--primary:hover {
    background: var(--primary-hover, #ea580c);
}

.ai-smeta-confirm-btn--secondary {
    background: var(--background, #ffffff);
    color: var(--foreground, #0a0a0a);
    border: 1px solid var(--border, #e4e4e7);
}

.ai-smeta-confirm-btn--secondary:hover {
    background: var(--muted, #f4f4f5);
}


/* ─────────────────────────────────────────────────────────────
   RESPONSIVE — DESKTOP ADJUSTMENTS
   ───────────────────────────────────────────────────────────── */

@media (min-width: 640px) {
    .ai-smeta-estimate-card {
        padding: 20px;
    }

    .ai-est__work-total {
        font-size: 0.875rem;
    }

    .ai-est__material-prices {
        font-size: 0.75rem;
    }
}


/* ─────────────────────────────────────────────────────────────
   RESPONSIVE — SMALL SCREENS
   ───────────────────────────────────────────────────────────── */

@media (max-width: 359px) {
    .ai-smeta-estimate-card {
        padding: 12px;
        border-radius: 12px;
    }

    .ai-est__title {
        font-size: 1rem;
    }

    .ai-est__section-sum {
        font-size: 0.6875rem;
    }

    .ai-est__totals {
        padding: 12px;
    }

    .ai-smeta-confirm-btn {
        padding: 0 16px;
        font-size: 0.8125rem;
        height: 40px;
    }
}


/* ─────────────────────────────────────────────────────────────
   EXPORT ACTIONS
   ───────────────────────────────────────────────────────────── */

.ai-smeta-msg--export {
    justify-content: stretch;
    width: 100%;
}

.ai-smeta-export-card {
    background: var(--background, #ffffff);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: 14px;
    box-shadow: var(--shadow-sm, 0 1px 2px 0 rgb(0 0 0 / 0.05));
    padding: 20px 16px;
    width: 100%;
    box-sizing: border-box;
}

.ai-smeta-export-card__title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
    margin-bottom: 14px;
    text-align: center;
}

.ai-smeta-export-card__actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* --- Export buttons --- */

.ai-smeta-export-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition:
        background var(--ai-transition-fast, 150ms ease),
        transform var(--ai-transition-fast, 150ms ease),
        opacity var(--ai-transition-fast, 150ms ease);
    -webkit-tap-highlight-color: transparent;
    box-sizing: border-box;
}

.ai-smeta-export-btn:active:not(:disabled) {
    transform: scale(0.98);
}

.ai-smeta-export-btn:disabled {
    cursor: default;
    opacity: 0.7;
}

.ai-smeta-export-btn__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 18px;
    height: 18px;
}

.ai-smeta-export-btn__icon svg {
    width: 18px;
    height: 18px;
}

.ai-smeta-export-btn--primary {
    height: 48px;
    background: var(--primary, #f97316);
    color: var(--primary-foreground, #ffffff);
}

.ai-smeta-export-btn--primary:hover:not(:disabled) {
    background: var(--primary-hover, #ea580c);
}

.ai-smeta-export-btn--secondary {
    height: 48px;
    background: var(--background, #ffffff);
    color: var(--foreground, #0a0a0a);
    border: 1px solid var(--border, #e4e4e7);
}

.ai-smeta-export-btn--secondary:hover:not(:disabled) {
    background: var(--muted, #f4f4f5);
}

.ai-smeta-export-btn--ghost {
    height: 44px;
    background: transparent;
    color: var(--muted-foreground, #71717a);
}

.ai-smeta-export-btn--ghost:hover:not(:disabled) {
    background: var(--muted, #f4f4f5);
}


/* ─────────────────────────────────────────────────────────────
   PDF STATES (spinner)
   ───────────────────────────────────────────────────────────── */

.ai-smeta-spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #ffffff;
    border-radius: 50%;
    animation: aiSmetaSpin 0.7s linear infinite;
}

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


/* ─────────────────────────────────────────────────────────────
   PAYWALL
   ───────────────────────────────────────────────────────────── */

.ai-smeta-paywall {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 24px 20px;
    position: relative;
}

.ai-smeta-paywall__icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: #fef2f2;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--destructive, #ef4444);
}

.ai-smeta-paywall__icon svg {
    width: 28px;
    height: 28px;
}

.ai-smeta-paywall__title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
    margin: 0 0 8px;
    letter-spacing: -0.01em;
}

.ai-smeta-paywall__desc {
    font-size: 0.875rem;
    color: var(--muted-foreground, #71717a);
    margin: 0 0 24px;
    line-height: 1.55;
}

.ai-smeta-paywall__desc strong {
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
}

/* --- Plan cards --- */

.ai-smeta-paywall__plans {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 320px;
}

.ai-smeta-paywall__plan {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 16px 20px;
    border: 1px solid var(--border, #e4e4e7);
    border-radius: 12px;
    background: var(--background, #ffffff);
    cursor: pointer;
    font-family: inherit;
    transition:
        background var(--ai-transition-fast, 150ms ease),
        border-color var(--ai-transition-fast, 150ms ease);
    -webkit-tap-highlight-color: transparent;
    position: relative;
    box-sizing: border-box;
}

.ai-smeta-paywall__plan:hover {
    background: var(--muted, #f4f4f5);
}

.ai-smeta-paywall__plan:active {
    transform: scale(0.98);
}

.ai-smeta-paywall__plan--subscription {
    border-color: var(--primary, #f97316);
}

.ai-smeta-paywall__plan-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--foreground, #0a0a0a);
}

.ai-smeta-paywall__plan-price {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary, #f97316);
}

.ai-smeta-paywall__plan-badge {
    position: absolute;
    top: -8px;
    right: 12px;
    font-size: 0.6875rem;
    font-weight: 600;
    background: #fff7ed;
    color: var(--primary, #f97316);
    padding: 2px 8px;
    border-radius: 4px;
    line-height: 1.4;
}

/* --- Reset date --- */

.ai-smeta-paywall__reset {
    font-size: 0.8125rem;
    color: var(--muted-foreground, #71717a);
    margin: 20px 0 0;
}

.ai-smeta-paywall__reset strong {
    font-weight: 600;
    color: var(--foreground, #0a0a0a);
}


/* ─────────────────────────────────────────────────────────────
   TOAST
   ───────────────────────────────────────────────────────────── */

.ai-smeta-toast {
    position: absolute;
    bottom: 12px;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    background: var(--foreground, #0a0a0a);
    color: var(--primary-foreground, #ffffff);
    font-size: 0.8125rem;
    font-weight: 500;
    padding: 10px 20px;
    border-radius: 10px;
    white-space: nowrap;
    opacity: 0;
    transition:
        opacity 200ms ease,
        transform 200ms ease;
    pointer-events: none;
    z-index: 10;
}

.ai-smeta-toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}


/* ─────────────────────────────────────────────────────────────
   RESPONSIVE — DESKTOP (Task 3 additions)
   ───────────────────────────────────────────────────────────── */

@media (min-width: 640px) {
    .ai-smeta-export-card {
        padding: 24px 20px;
    }
}


/* ─────────────────────────────────────────────────────────────
   RESPONSIVE — SMALL SCREENS (Task 3 additions)
   ───────────────────────────────────────────────────────────── */

@media (max-width: 359px) {
    .ai-smeta-export-card {
        padding: 16px 12px;
    }

    .ai-smeta-export-btn--primary,
    .ai-smeta-export-btn--secondary {
        height: 44px;
        font-size: 0.875rem;
    }

    .ai-smeta-export-btn--ghost {
        height: 40px;
        font-size: 0.8125rem;
    }

    .ai-smeta-paywall__plans {
        max-width: 100%;
    }

    .ai-smeta-paywall__plan {
        padding: 14px 16px;
    }

    .ai-smeta-toast {
        font-size: 0.75rem;
        padding: 8px 16px;
    }
}

/* ─────────────────────────────────────────────────────────────
   MULTI-SELECT CHECKLIST (Task 16.5 — additional_sections)

   Используется для вопросов с type=multi_select (collected через
   чекбоксы, а не одиночной кнопкой). Переиспользуется всеми
   подзадачами Task 16.x (окна, электрика, водоснабжение и т. д.).

   ЗАПРЕЩЕНО: менять role/aria на не-input — это ломает
   accessibility tree и Playwright MCP-тесты.
   ───────────────────────────────────────────────────────────── */

.ai-smeta-checklist {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 10px 4px 4px;
    margin-left: 2px;
    opacity: 0;
    transform: translateY(6px);
    animation: aiSmetaMsgIn var(--ai-transition-normal) 100ms forwards;
}

.ai-smeta-checklist__list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.ai-smeta-checklist__item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    background: var(--background, #ffffff);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: 10px;
    font-size: 0.875rem;
    color: var(--foreground, #0a0a0a);
    cursor: pointer;
    transition:
        background var(--ai-transition-fast),
        border-color var(--ai-transition-fast);
}

.ai-smeta-checklist__item:hover {
    background: var(--muted, #f4f4f5);
    border-color: #d4d4d8;
}

.ai-smeta-checklist__input {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    margin: 0;
    accent-color: var(--primary, #f97316);
    cursor: pointer;
}

.ai-smeta-checklist__label {
    flex: 1;
    line-height: 1.4;
    user-select: none;
}

.ai-smeta-checklist__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding-top: 4px;
}

.ai-smeta-checklist__submit {
    display: inline-flex;
    align-items: center;
    height: 38px;
    padding: 0 18px;
    background: var(--primary, #f97316);
    color: var(--primary-foreground, #ffffff);
    border: 0;
    border-radius: 9999px;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--ai-transition-fast);
}

.ai-smeta-checklist__submit:hover {
    background: var(--primary-hover, #ea580c);
}

.ai-smeta-checklist__skip {
    display: inline-flex;
    align-items: center;
    height: 38px;
    padding: 0 16px;
    background: var(--background, #ffffff);
    color: var(--muted-foreground, #71717a);
    border: 1px solid var(--border, #e4e4e7);
    border-radius: 9999px;
    font-family: inherit;
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition:
        background var(--ai-transition-fast),
        border-color var(--ai-transition-fast);
}

.ai-smeta-checklist__skip:hover {
    background: var(--muted, #f4f4f5);
    border-color: #d4d4d8;
}

@media (max-width: 640px) {
    .ai-smeta-checklist__item {
        padding: 12px;
        font-size: 0.8125rem;
    }

    .ai-smeta-checklist__actions {
        flex-direction: column;
    }

    .ai-smeta-checklist__submit,
    .ai-smeta-checklist__skip {
        width: 100%;
        justify-content: center;
    }
}