/* ===== Reset & tokens ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
    --ink: #1d2233;
    --muted: #5a6178;
    --accent: #5b6cff;
    --accent-2: #8b5cf6;
    --accent-grad: linear-gradient(135deg, #5b6cff 0%, #8b5cf6 100%);

    /* liquid glass */
    --glass-bg: linear-gradient(135deg, rgba(255, 255, 255, 0.62), rgba(255, 255, 255, 0.34));
    --glass-bg-soft: linear-gradient(135deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0.26));
    --glass-border: rgba(255, 255, 255, 0.7);
    --glass-blur: blur(22px) saturate(180%);
    --glass-shadow: 0 10px 40px rgba(40, 50, 120, 0.14);
    --glass-sheen: inset 0 1px 0 rgba(255, 255, 255, 0.75), inset 0 -1px 0 rgba(255, 255, 255, 0.18);

    --radius: 24px;
    --radius-sm: 16px;
}

html, body { height: 100%; }

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
    color: var(--ink);
    min-height: 100vh;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    background:
        radial-gradient(900px 700px at 18% 12%, #cdd9ff 0%, transparent 55%),
        radial-gradient(800px 650px at 85% 8%, #e6d3ff 0%, transparent 52%),
        radial-gradient(820px 680px at 80% 88%, #c8f5ec 0%, transparent 52%),
        radial-gradient(760px 640px at 12% 92%, #ffd9ea 0%, transparent 52%),
        linear-gradient(140deg, #eef2ff, #f7f1ff 55%, #f0fbff);
    background-attachment: fixed;
}

/* ===== Цветные блобы (живой фон под стеклом) ===== */
.bg { position: fixed; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.blob { position: absolute; border-radius: 50%; filter: blur(70px); opacity: 0.5; will-change: transform; }
.blob--1 { width: 42vmax; height: 42vmax; left: -10vmax; top: -12vmax; background: radial-gradient(circle, #7c8bff, transparent 70%); animation: drift 26s ease-in-out infinite; }
.blob--2 { width: 36vmax; height: 36vmax; right: -8vmax; top: 6vmax; background: radial-gradient(circle, #c79bff, transparent 70%); animation: drift 32s ease-in-out infinite reverse; }
.blob--3 { width: 34vmax; height: 34vmax; right: 6vmax; bottom: -14vmax; background: radial-gradient(circle, #6ee7d2, transparent 70%); animation: drift 30s ease-in-out infinite; }
.blob--4 { width: 30vmax; height: 30vmax; left: 4vmax; bottom: -12vmax; background: radial-gradient(circle, #ff9ec4, transparent 70%); animation: drift 36s ease-in-out infinite reverse; }
@keyframes drift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(5vmax, 4vmax) scale(1.08); }
    66% { transform: translate(-4vmax, 2vmax) scale(0.95); }
}

/* ===== Shell ===== */
.app {
    position: relative;
    z-index: 1;
    max-width: 980px;
    margin: 0 auto;
    padding: clamp(16px, 3.5vw, 30px);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    gap: clamp(18px, 3.5vw, 30px);
}

/* ===== Topbar ===== */
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.wordmark { display: inline-flex; align-items: center; gap: 11px; font-size: clamp(16px, 2.4vw, 19px); font-weight: 700; letter-spacing: -0.015em; }
.wordmark .dot {
    width: 38px; height: 38px; flex: 0 0 auto;
    display: grid; place-items: center; font-size: 20px;
    border-radius: 13px;
    background: var(--glass-bg);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), var(--glass-sheen);
}
.reset {
    font: inherit; font-size: 13px; padding: 9px 16px; border-radius: 999px; cursor: pointer; color: var(--ink);
    background: var(--glass-bg);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), var(--glass-sheen);
    transition: transform 0.18s ease, box-shadow 0.2s ease;
}
.reset:hover { transform: translateY(-1px); box-shadow: 0 14px 38px rgba(40, 50, 120, 0.2), var(--glass-sheen); }
.reset:active { transform: translateY(0); }

/* ===== Stage (mobile-first: колонка) ===== */
.stage { flex: 1; display: flex; flex-direction: column; align-items: center; gap: clamp(14px, 3vw, 20px); }

.stage-row {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}
.side { width: 100%; max-width: 460px; display: flex; justify-content: center; }
.side--left { order: 1; }
.side--right { order: 2; }

/* ===== Penguin ===== */
.penguin-stage {
    position: relative;
    order: 3;
    flex: 0 0 auto;
    width: clamp(200px, 66vw, 300px);
    aspect-ratio: 1 / 1;
    display: grid; place-items: center;
}
.penguin-ring {
    position: absolute; inset: 8%;
    background: radial-gradient(circle at 50% 45%, rgba(124, 139, 255, 0.35), rgba(110, 231, 210, 0.16) 48%, transparent 70%);
    border-radius: 50%;
    filter: blur(6px);
    animation: glow 6s ease-in-out infinite;
}
@keyframes glow { 0%, 100% { transform: scale(1); opacity: 0.9; } 50% { transform: scale(1.07); opacity: 1; } }
.model { position: relative; z-index: 2; width: 100%; height: 100%; cursor: grab; touch-action: none; }
.model:active { cursor: grabbing; }
.model canvas { display: block; width: 100% !important; height: 100% !important; }
.pedestal {
    position: absolute; bottom: 9%; width: 54%; height: 7%;
    background: radial-gradient(ellipse at center, rgba(40, 50, 120, 0.22), transparent 70%);
    filter: blur(7px); z-index: 1;
}

/* Stage loader */
.stage-loader {
    position: absolute; inset: 0; z-index: 5;
    display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
    color: var(--muted); transition: opacity 0.4s ease;
}
.penguin-stage.loaded .stage-loader { opacity: 0; pointer-events: none; }
.spinner { width: 38px; height: 38px; border-radius: 50%; border: 3px solid rgba(91, 108, 255, 0.25); border-top-color: var(--accent); animation: spin 0.9s linear infinite; }
.stage-loader__text { font-size: 12.5px; }
@keyframes spin { to { transform: rotate(360deg); } }

/* Fallback пингвин */
.penguin-fallback {
    width: 100%; height: 100%; display: grid; place-items: center;
    font-size: clamp(80px, 26vmin, 150px); cursor: pointer; user-select: none;
    filter: drop-shadow(0 14px 22px rgba(40, 50, 120, 0.25));
    animation: floaty 3s ease-in-out infinite;
}
.penguin-fallback.bounce { animation: fbBounce 0.5s cubic-bezier(0.34, 1.56, 0.64, 1); }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-9px); } }
@keyframes fbBounce { 0% { transform: translateY(0) scale(1); } 40% { transform: translateY(-22px) scale(1.07); } 100% { transform: translateY(0) scale(1); } }

/* ===== Bubbles (liquid glass) ===== */
.bubble {
    position: relative;
    max-width: 100%;
    padding: 14px 18px;
    border-radius: var(--radius);
    font-size: 15px;
    color: var(--ink);
    background: var(--glass-bg);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), var(--glass-sheen);
    animation: pop 0.34s cubic-bezier(0.34, 1.56, 0.64, 1);
    word-wrap: break-word; overflow-wrap: anywhere;
}
.bubble[hidden] { display: none; }
.bubble--bot { border-top-left-radius: 8px; }
.bubble--user {
    color: #fff;
    background: linear-gradient(135deg, rgba(91, 108, 255, 0.92), rgba(139, 92, 246, 0.88));
    border: 1px solid rgba(255, 255, 255, 0.45);
    border-top-right-radius: 8px;
    box-shadow: 0 12px 34px rgba(91, 108, 255, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.5);
}
.bubble__tail { display: none; position: absolute; top: 24px; width: 13px; height: 13px; }
.bubble--user .bubble__tail { right: -6px; background: rgba(124, 100, 250, 0.9); transform: rotate(45deg); }
.bubble--bot .bubble__tail { left: -6px; background: rgba(255, 255, 255, 0.6); border-left: 1px solid var(--glass-border); border-bottom: 1px solid var(--glass-border); transform: rotate(45deg); -webkit-backdrop-filter: var(--glass-blur); backdrop-filter: var(--glass-blur); }
@keyframes pop { 0% { opacity: 0; transform: translateY(7px) scale(0.96); } 100% { opacity: 1; transform: translateY(0) scale(1); } }

/* Typing dots */
.dots { display: inline-flex; gap: 5px; align-items: center; padding: 3px 0; }
.dots i { width: 7px; height: 7px; border-radius: 50%; background: currentColor; opacity: 0.45; animation: blink 1.2s infinite ease-in-out; }
.dots i:nth-child(2) { animation-delay: 0.2s; }
.dots i:nth-child(3) { animation-delay: 0.4s; }
@keyframes blink { 0%, 80%, 100% { transform: scale(0.7); opacity: 0.35; } 40% { transform: scale(1); opacity: 0.95; } }

.hint { font-size: 12.5px; color: var(--muted); text-align: center; }

/* ===== Ask / questions (liquid glass) ===== */
.ask {
    width: 100%;
    max-width: 640px;
    padding: clamp(14px, 3vw, 20px);
    border-radius: var(--radius);
    background: var(--glass-bg-soft);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), var(--glass-sheen);
}
.ask__head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 14px; flex-wrap: wrap; }
.ask__title { font-size: 12px; font-weight: 700; color: var(--muted); text-transform: uppercase; letter-spacing: 0.08em; }
.add-btn {
    font: inherit; font-size: 13px; padding: 8px 15px; border-radius: 999px; cursor: pointer; color: var(--accent); font-weight: 600;
    background: rgba(255, 255, 255, 0.55);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.7);
    transition: transform 0.18s ease, box-shadow 0.2s ease;
}
.add-btn:hover { transform: translateY(-1px); box-shadow: 0 8px 22px rgba(91, 108, 255, 0.25); }

.chips { display: flex; flex-wrap: wrap; gap: 9px; }
.chip {
    position: relative;
    display: inline-flex; align-items: center;
    padding: 10px 16px; border-radius: 999px;
    font: inherit; font-size: 13.5px; cursor: pointer; color: var(--ink);
    background: rgba(255, 255, 255, 0.5);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.65);
    box-shadow: 0 4px 14px rgba(40, 50, 120, 0.08);
    transition: transform 0.16s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.chip:hover { transform: translateY(-2px); background: rgba(255, 255, 255, 0.75); box-shadow: 0 10px 24px rgba(91, 108, 255, 0.22); }
.chip:active { transform: translateY(0) scale(0.98); }
.chip--custom { padding-right: 32px; }
.chip__del {
    position: absolute; right: 5px; top: 50%; transform: translateY(-50%);
    width: 20px; height: 20px; border-radius: 50%;
    border: none; background: rgba(40, 50, 120, 0.1); color: var(--muted);
    font-size: 13px; line-height: 1; cursor: pointer; display: grid; place-items: center;
    transition: background 0.16s ease, color 0.16s ease;
}
.chip__del:hover { background: #ff5d7a; color: #fff; }

/* Add-question form */
.add-form { display: flex; flex-wrap: wrap; gap: 9px; margin-bottom: 14px; }
.add-form[hidden] { display: none; }
.add-form__input {
    flex: 1; min-width: 180px;
    padding: 11px 15px; border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.7); color: var(--ink);
    background: rgba(255, 255, 255, 0.6);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    font: inherit; font-size: 14px; outline: none;
    transition: border-color 0.18s ease, box-shadow 0.2s ease;
}
.add-form__input::placeholder { color: var(--muted); }
.add-form__input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(91, 108, 255, 0.18); }

.btn {
    font: inherit; font-size: 13.5px; padding: 10px 17px; border-radius: 999px; cursor: pointer; color: var(--ink);
    background: rgba(255, 255, 255, 0.6); border: 1px solid rgba(255, 255, 255, 0.7);
    -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
    transition: transform 0.16s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn--solid { background: var(--accent-grad); border: 1px solid rgba(255, 255, 255, 0.4); color: #fff; box-shadow: 0 8px 22px rgba(91, 108, 255, 0.4); }

/* ===== Composer (liquid glass) ===== */
.composer {
    width: 100%; max-width: 640px;
    display: flex; gap: 10px; align-items: center;
    padding: 8px 8px 8px 20px;
    border-radius: 999px;
    background: var(--glass-bg);
    -webkit-backdrop-filter: var(--glass-blur);
    backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow), var(--glass-sheen);
    transition: box-shadow 0.2s ease;
}
.composer:focus-within { box-shadow: 0 0 0 3px rgba(91, 108, 255, 0.22), var(--glass-shadow); }
.composer__input {
    flex: 1; border: none; outline: none; background: transparent;
    font: inherit; font-size: 15px; color: var(--ink);
}
.composer__input::placeholder { color: var(--muted); }
.send {
    flex: 0 0 auto;
    width: 46px; height: 46px; border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.4); color: #fff;
    background: var(--accent-grad);
    font-size: 20px; line-height: 1; cursor: pointer;
    display: grid; place-items: center;
    box-shadow: 0 8px 22px rgba(91, 108, 255, 0.45);
    transition: transform 0.16s ease, box-shadow 0.2s ease;
}
.send:hover:not(:disabled) { transform: translateY(-2px) scale(1.04); box-shadow: 0 12px 28px rgba(91, 108, 255, 0.55); }
.send:active:not(:disabled) { transform: scale(0.94); }
.send:disabled { opacity: 0.55; cursor: not-allowed; }

/* ===== Планшеты и десктоп: реплики ПО БОКАМ пингвина ===== */
@media (min-width: 760px) {
    .stage-row { flex-direction: row; align-items: center; gap: clamp(10px, 2vw, 24px); }
    .side { flex: 1 1 0; min-width: 0; max-width: 300px; order: 0; }
    .side--left { justify-content: flex-end; }
    .side--right { justify-content: flex-start; }
    .penguin-stage { order: 0; width: clamp(230px, 30vw, 340px); }
    .bubble { max-width: 100%; }
    .bubble__tail { display: block; }
}

/* Точная подстройка под крупные планшеты/десктоп */
@media (min-width: 1024px) {
    .side { max-width: 320px; }
}

/* Совсем маленькие телефоны */
@media (max-width: 380px) {
    .app { padding: 14px; }
    .penguin-stage { width: clamp(180px, 70vw, 240px); }
    .chip { padding: 9px 13px; font-size: 13px; }
}

/* Если нет поддержки backdrop-filter — делаем фон плотнее, чтобы текст читался */
@supports not ((-webkit-backdrop-filter: blur(1px)) or (backdrop-filter: blur(1px))) {
    .wordmark .dot, .reset, .bubble, .ask, .composer, .chip, .add-btn, .add-form__input, .btn {
        background: rgba(255, 255, 255, 0.92);
    }
    .bubble--user { background: linear-gradient(135deg, #5b6cff, #8b5cf6); }
}

@media (prefers-reduced-motion: reduce) {
    .blob, .penguin-ring, .penguin-fallback, .spinner { animation: none !important; }
    * { scroll-behavior: auto; }
}