* {
    box-sizing: border-box;
}

:root {
    --bg: #f2f0ea;
    --bg-soft: #ebe7de;
    --panel: linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(244,238,225,0.96) 100%);
    --panel-strong: linear-gradient(180deg, #f8f5ee 0%, #e8dfcf 100%);
    --gold-1: #f7e6b0;
    --gold-2: #d8b15a;
    --gold-3: #b9851f;
    --gold-4: #8d6416;
    --gold-line: rgba(181, 133, 31, 0.45);
    --text: #4d412d;
    --text-soft: #7d6b51;
    --shadow: 0 24px 70px rgba(111, 90, 40, 0.16);
    --shadow-soft: 0 12px 28px rgba(111, 90, 40, 0.10);
    --radius-xl: 28px;
    --radius-lg: 22px;
    --radius-md: 16px;
    --danger-glow: #ff5a1f;
}

html,
body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    font-family: "Segoe UI", "Inter", Arial, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(255,255,255,0.95) 0%, rgba(255,255,255,0) 34%),
        radial-gradient(circle at bottom right, rgba(216,177,90,0.12) 0%, rgba(216,177,90,0) 36%),
        linear-gradient(135deg, #f6f4ef 0%, #ece7dc 46%, #f7f4ed 100%);
    color: var(--text);
}

body {
    padding: 24px;
}

.app {
    width: 100%;
    min-height: calc(100vh - 48px);
    display: grid;
    grid-template-columns: 420px minmax(0, 1fr);
    gap: 24px;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.panel {
    position: relative;
    background: var(--panel);
    border: 1px solid rgba(255,255,255,0.78);
    border-radius: var(--radius-xl);
    padding: 22px;
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

.panel::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 1px;
    background: linear-gradient(135deg, rgba(255,255,255,0.95), rgba(216,177,90,0.65), rgba(255,255,255,0.6));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    pointer-events: none;
}

.panel::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    top: 0;
    height: 4px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(247,230,176,0.15), rgba(216,177,90,0.85), rgba(255,90,31,0.92), rgba(216,177,90,0.55), rgba(247,230,176,0.08));
    box-shadow: 0 0 12px rgba(255,90,31,0.35);
}

.title {
    margin: 0 0 8px;
    font-size: 1.9rem;
    line-height: 1.1;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--gold-4);
}

.subtitle {
    margin: 0;
    font-size: 0.97rem;
    line-height: 1.55;
    color: var(--text-soft);
}

.panel h3 {
    margin: 0 0 18px;
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--gold-4);
    letter-spacing: 0.01em;
}

code {
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(216,177,90,0.12);
    color: var(--gold-4);
    border: 1px solid rgba(181,133,31,0.18);
    font-size: 0.92em;
}

.form-grid {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.row-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--gold-4);
}

input,
textarea,
select {
    width: 100%;
    border: 1px solid rgba(181,133,31,0.18);
    background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(244,239,229,0.92));
    color: var(--text);
    border-radius: 16px;
    padding: 13px 14px;
    font-size: 0.96rem;
    outline: none;
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.85),
        0 4px 10px rgba(111, 90, 40, 0.05);
    transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

input:focus,
textarea:focus,
select:focus {
    border-color: rgba(185,133,31,0.55);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.95),
        0 0 0 4px rgba(216,177,90,0.15),
        0 10px 18px rgba(111, 90, 40, 0.10);
    transform: translateY(-1px);
}

textarea {
    min-height: 92px;
    resize: vertical;
    font-family: inherit;
}

input[type="file"] {
    padding: 11px 12px;
    cursor: pointer;
}

input[type="color"] {
    min-height: 52px;
    padding: 6px;
    border-radius: 16px;
    cursor: pointer;
    background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(244,239,229,0.92));
}

.actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

button {
    appearance: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-size: 0.96rem;
    font-weight: 800;
    border-radius: 18px;
    min-height: 54px;
    padding: 14px 18px;
    transition: transform 0.18s ease, box-shadow 0.18s ease, filter 0.18s ease;
    position: relative;
    overflow: hidden;
}

button:hover {
    transform: translateY(-2px);
}

button:active {
    transform: translateY(0);
}

.btn-main {
    color: #fff8eb;
    background:
        linear-gradient(180deg, #f2d58b 0%, #d4a84e 35%, #b9851f 70%, #8d6416 100%);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.45),
        inset 0 -1px 0 rgba(77,65,45,0.18),
        0 14px 24px rgba(185,133,31,0.24);
    border: 1px solid rgba(141,100,22,0.55);
}

.btn-main::before {
    content: "";
    position: absolute;
    inset: 1px 1px auto 1px;
    height: 48%;
    border-radius: 17px 17px 28px 28px;
    background: linear-gradient(180deg, rgba(255,255,255,0.38), rgba(255,255,255,0.02));
    pointer-events: none;
}

.btn-alt {
    color: var(--gold-4);
    background:
        linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(240,232,217,0.98) 100%);
    border: 1px solid rgba(185,133,31,0.28);
    box-shadow:
        inset 0 1px 0 rgba(255,255,255,0.95),
        0 10px 18px rgba(111, 90, 40, 0.08);
}

.preview-wrap {
    position: relative;
    min-width: 0;
    display: grid;
    grid-template-rows: auto 1fr auto;
    gap: 18px;
}

.topbar,
.footbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 16px 20px;
    border-radius: 24px;
    background: var(--panel-strong);
    border: 1px solid rgba(255,255,255,0.82);
    box-shadow: var(--shadow-soft);
    color: var(--text-soft);
    position: relative;
    overflow: hidden;
}

.topbar::before,
.footbar::before {
    content: "";
    position: absolute;
    left: 20px;
    right: 20px;
    top: 0;
    height: 4px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(247,230,176,0.15), rgba(216,177,90,0.8), rgba(255,90,31,0.85), rgba(216,177,90,0.4));
    box-shadow: 0 0 10px rgba(255,90,31,0.28);
}

.stat {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    color: var(--gold-4);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, #fff2ba 0%, #d8b15a 38%, #ff5a1f 100%);
    box-shadow:
        0 0 0 4px rgba(255,90,31,0.10),
        0 0 12px rgba(255,90,31,0.45);
    flex: 0 0 auto;
}

.viewer-card {
    position: relative;
    min-height: 620px;
    border-radius: 34px;
    overflow: hidden;
    background:
        radial-gradient(circle at top left, rgba(255,255,255,0.85) 0%, rgba(255,255,255,0) 30%),
        linear-gradient(180deg, #faf8f3 0%, #ece5d8 100%);
    border: 1px solid rgba(255,255,255,0.9);
    box-shadow: var(--shadow);
}

.viewer-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(135deg, rgba(255,255,255,0.18), rgba(255,255,255,0) 42%),
        radial-gradient(circle at 70% 18%, rgba(216,177,90,0.14), rgba(216,177,90,0) 28%);
}

.viewer-card::after {
    content: "";
    position: absolute;
    left: 34px;
    right: 34px;
    top: 0;
    height: 5px;
    border-radius: 999px;
    background: linear-gradient(90deg, rgba(247,230,176,0.15), rgba(216,177,90,0.72), rgba(255,90,31,0.95), rgba(216,177,90,0.48), rgba(247,230,176,0.08));
    box-shadow: 0 0 14px rgba(255,90,31,0.35);
    pointer-events: none;
    z-index: 2;
}

model-viewer {
    width: 100%;
    height: 100%;
    min-height: 620px;
    background:
        radial-gradient(circle at 50% 18%, rgba(255,255,255,0.82) 0%, rgba(255,255,255,0) 36%),
        linear-gradient(180deg, #f9f7f2 0%, #ebe5d9 100%);
    --poster-color: transparent;
}

small {
    font-size: 0.85rem;
    color: var(--text-soft);
}

.hidden {
    display: none !important;
}

@media (max-width: 1200px) {
    .app {
        grid-template-columns: 380px minmax(0, 1fr);
    }
}

@media (max-width: 980px) {
    body {
        padding: 16px;
    }

    .app {
        min-height: auto;
        grid-template-columns: 1fr;
    }

    .viewer-card,
    model-viewer {
        min-height: 460px;
    }
}

@media (max-width: 640px) {
    .panel,
    .topbar,
    .footbar {
        border-radius: 22px;
    }

    .viewer-card {
        border-radius: 24px;
    }

    .row-2,
    .actions {
        grid-template-columns: 1fr;
    }

    .title {
        font-size: 1.55rem;
    }

    .viewer-card,
    model-viewer {
        min-height: 360px;
    }

    .topbar,
    .footbar {
        flex-direction: column;
        align-items: flex-start;
    }
}