<style>*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg: #020b12;
    --surface: rgba(6, 22, 36, 0.7);
    --surface-hover: rgba(10, 35, 55, 0.85);
    --border: rgba(0, 210, 180, 0.15);
    --border-hover: rgba(0, 210, 180, 0.4);
    --teal: #00d2b4;
    --teal-dim: rgba(0, 210, 180, 0.08);
    --teal-glow: rgba(0, 210, 180, 0.25);
    --cyan: #00b8ff;
    --green: #39ff8f;
    --amber: #ffb830;
    --text: #e2f0f8;
    --muted: rgba(180, 215, 235, 0.5);
    --mono: 'Space Mono', monospace;
    --display: 'Syne', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--display);
    min-height: 100vh;
    overflow-x: hidden;
}

/* ── Canvas background ── */
#bg-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.55;
}

/* ── Layout ── */
.wrap {
    position: relative;
    z-index: 1;
    max-width: 860px;
    margin: 0 auto;
    padding: 0 24px 80px;
}

/* ── Header ── */
header {
    text-align: center;
    padding: 72px 0 48px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--teal);
    border: 1px solid var(--border-hover);
    padding: 5px 14px;
    border-radius: 100px;
    margin-bottom: 28px;
    background: var(--teal-dim);
    animation: fadeDown 0.6s ease both;
}

.eyebrow-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--teal);
    animation: pulse 2s ease-in-out infinite;
}

h1 {
    font-size: clamp(36px, 7vw, 64px);
    font-weight: 800;
    line-height: 1.05;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, #e2f0f8 0%, var(--teal) 55%, var(--cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeDown 0.6s 0.1s ease both;
    margin-bottom: 16px;
}

.subtitle {
    font-size: 16px;
    color: var(--muted);
    line-height: 1.6;
    max-width: 520px;
    margin: 0 auto 0;
    animation: fadeDown 0.6s 0.2s ease both;
    font-weight: 400;
}

/* ── Upload panel ── */
.upload-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 36px 40px;
    margin-bottom: 40px;
    backdrop-filter: blur(16px);
    animation: fadeUp 0.6s 0.3s ease both;
    transition: border-color 0.3s, box-shadow 0.3s;
    position: relative;
    overflow: hidden;
}

.upload-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--teal), transparent);
    opacity: 0.6;
}

.upload-panel:hover {
    border-color: var(--border-hover);
    box-shadow: 0 0 40px var(--teal-glow), inset 0 0 40px rgba(0, 210, 180, 0.02);
}

.panel-label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--teal);
    margin-bottom: 20px;
}

.upload-area {
    border: 1.5px dashed var(--border-hover);
    border-radius: 12px;
    padding: 32px;
    text-align: center;
    cursor: pointer;
    transition: all 0.25s;
    margin-bottom: 20px;
    background: var(--teal-dim);
    position: relative;
}

.upload-area:hover,
.upload-area.drag-over {
    border-color: var(--teal);
    background: rgba(0, 210, 180, 0.1);
    transform: scale(1.005);
}

.upload-area input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
    height: 100%;
}

.upload-icon {
    width: 44px;
    height: 44px;
    margin: 0 auto 12px;
    border: 1.5px solid var(--border-hover);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--teal-dim);
}

.upload-icon svg {
    color: var(--teal);
}

.upload-main-text {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
}

.upload-sub-text {
    font-size: 12px;
    color: var(--muted);
    font-family: var(--mono);
}

.file-name {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--teal);
    margin-top: 10px;
    min-height: 18px;
    transition: opacity 0.3s;
}

/* ── Sequence textarea ── */
.seq-divider {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 16px 0;
    color: var(--muted);
    font-size: 12px;
    font-family: var(--mono);
}

.seq-divider::before,
.seq-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

textarea {
    width: 100%;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--teal);
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.7;
    padding: 14px 16px;
    resize: vertical;
    min-height: 90px;
    outline: none;
    transition: border-color 0.25s, box-shadow 0.25s;
    letter-spacing: 0.05em;
}

textarea::placeholder {
    color: rgba(0, 210, 180, 0.3);
}

textarea:focus {
    border-color: var(--teal);
    box-shadow: 0 0 0 3px rgba(0, 210, 180, 0.1);
}

/* ── Analyze button ── */
.btn-analyze {
    width: 100%;
    margin-top: 20px;
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--teal) 0%, var(--cyan) 100%);
    color: #020b12;
    font-family: var(--display);
    font-weight: 700;
    font-size: 15px;
    letter-spacing: 0.04em;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    transition: transform 0.18s, box-shadow 0.18s, filter 0.18s;
}

.btn-analyze::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2), transparent);
    opacity: 0;
    transition: opacity 0.2s;
}

.btn-analyze:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 210, 180, 0.4);
    filter: brightness(1.05);
}

.btn-analyze:hover::before {
    opacity: 1;
}

.btn-analyze:active {
    transform: translateY(0) scale(0.99);
}

.btn-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

/* ── Progress bar (hidden by default) ── */
.progress-wrap {
    margin-top: 16px;
    display: none;
}

.progress-wrap.active {
    display: block;
}

.progress-bar-bg {
    height: 4px;
    background: var(--border);
    border-radius: 4px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--teal), var(--cyan));
    border-radius: 4px;
    width: 0%;
    transition: width 0.4s ease;
    box-shadow: 0 0 8px var(--teal);
}

.progress-label {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--muted);
    margin-top: 8px;
    display: flex;
    justify-content: space-between;
}

/* ── Feature grid ── */
.section-heading {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 20px;
    animation: fadeUp 0.6s 0.4s ease both;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    animation: fadeUp 0.6s 0.45s ease both;
}

.feature-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px 26px;
    cursor: pointer;
    transition: all 0.25s;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(12px);
}

.feature-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--card-accent, var(--teal)), transparent);
    transform: scaleX(0);
    transition: transform 0.3s;
}

.feature-card:hover {
    border-color: var(--card-accent, var(--teal));
    background: var(--surface-hover);
    transform: translateY(-3px);
    box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3), 0 0 20px var(--card-glow, var(--teal-glow));
}

.feature-card:hover::after {
    transform: scaleX(1);
}

.feature-card.c-teal {
    --card-accent: var(--teal);
    --card-glow: rgba(0, 210, 180, 0.15);
}

.feature-card.c-cyan {
    --card-accent: var(--cyan);
    --card-glow: rgba(0, 184, 255, 0.15);
}

.feature-card.c-green {
    --card-accent: var(--green);
    --card-glow: rgba(57, 255, 143, 0.15);
}

.feature-card.c-amber {
    --card-accent: var(--amber);
    --card-glow: rgba(255, 184, 48, 0.15);
}

.card-icon {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--card-accent, var(--teal));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 18px;
}

.card-tag {
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--card-accent, var(--teal));
    margin-bottom: 8px;
}

.card-title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text);
}

.card-desc {
    font-size: 13px;
    color: var(--muted);
    line-height: 1.65;
    font-weight: 400;
}

.card-arrow {
    position: absolute;
    top: 26px;
    right: 24px;
    color: var(--card-accent, var(--teal));
    opacity: 0;
    transition: opacity 0.2s, transform 0.2s;
    font-size: 18px;
}

.feature-card:hover .card-arrow {
    opacity: 1;
    transform: translate(2px, -2px);
}

/* ── Stats bar ── */
.stats-bar {
    display: flex;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: 14px;
    overflow: hidden;
    margin: 40px 0;
    backdrop-filter: blur(12px);
    background: var(--surface);
    animation: fadeUp 0.6s 0.5s ease both;
}

.stat-item {
    flex: 1;
    padding: 20px 24px;
    border-right: 1px solid var(--border);
    transition: background 0.2s;
}

.stat-item:last-child {
    border-right: none;
}

.stat-item:hover {
    background: var(--teal-dim);
}

.stat-num {
    font-family: var(--mono);
    font-size: 22px;
    font-weight: 700;
    color: var(--teal);
    display: block;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 11px;
    color: var(--muted);
    letter-spacing: 0.05em;
}

/* ── Results panel (hidden) ── */
.results-panel {
    background: var(--surface);
    border: 1px solid var(--border-hover);
    border-radius: 20px;
    padding: 32px 36px;
    margin-top: 32px;
    display: none;
    animation: fadeUp 0.4s ease both;
    backdrop-filter: blur(16px);
    position: relative;
    overflow: hidden;
}

.results-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--teal), transparent);
}

.results-panel.active {
    display: block;
}

.results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.results-title {
    font-size: 14px;
    font-weight: 700;
}

.results-badge {
    font-family: var(--mono);
    font-size: 10px;
    padding: 4px 10px;
    background: rgba(57, 255, 143, 0.1);
    border: 1px solid rgba(57, 255, 143, 0.3);
    border-radius: 100px;
    color: var(--green);
    letter-spacing: 0.1em;
}

.metrics-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-bottom: 24px;
}

.metric-box {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px 16px;
}

.metric-val {
    font-family: var(--mono);
    font-size: 20px;
    font-weight: 700;
    color: var(--teal);
    display: block;
}

.metric-key {
    font-size: 11px;
    color: var(--muted);
    margin-top: 3px;
}

.seq-display {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 16px;
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.8;
    letter-spacing: 0.06em;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

.base-A {
    color: #39ff8f;
}

.base-T {
    color: #ff6b6b;
}

.base-G {
    color: #00b8ff;
}

.base-C {
    color: #ffb830;
}

.base-gap {
    color: var(--muted);
}

/* ── Animations ── */
@keyframes fadeDown {
    from {
        opacity: 0;
        transform: translateY(-14px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }

    to {
        opacity: 1;
        transform: none;
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.35;
    }
}

@media (max-width: 600px) {
    .upload-panel {
        padding: 24px 20px;
    }

    .metrics-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats-bar {
        flex-direction: column;
    }

    .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--border);
    }

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

.details-grid {
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}

.details-grid.active {
    display: grid;
}

.detail-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 22px;
    backdrop-filter: blur(12px);
}

.full-card {
    grid-column: 1 / -1;
}

.detail-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 14px;
}

.detail-header h3 {
    font-size: 16px;
    color: var(--text);
}

.summary-table {
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.summary-table div {
    display: flex;
    justify-content: space-between;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}

.summary-table div:last-child {
    border-bottom: none;
}

.summary-table span:last-child {
    color: var(--teal);
    font-family: var(--mono);
}

.sequence-box {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px;
    color: var(--teal);
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.7;
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 180px;
    overflow-y: auto;
}

.copy-btn {
    background: var(--teal-dim);
    border: 1px solid var(--border-hover);
    color: var(--teal);
    border-radius: 8px;
    padding: 6px 12px;
    font-family: var(--mono);
    font-size: 11px;
    cursor: pointer;
}

.copy-btn:hover {
    background: rgba(0, 210, 180, 0.15);
}

.mini-badge {
    font-family: var(--mono);
    font-size: 11px;
    color: var(--teal);
    border: 1px solid var(--border-hover);
    padding: 4px 10px;
    border-radius: 999px;
}

.orf-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    overflow: hidden;
    border-radius: 10px;
}

.orf-table th,
.orf-table td {
    border: 1px solid var(--border);
    padding: 10px;
    text-align: left;
}

.orf-table th {
    color: var(--teal);
    font-family: var(--mono);
    font-size: 11px;
    text-transform: uppercase;
}

.orf-table td {
    color: var(--text);
    font-family: var(--mono);
    word-break: break-all;
}

@media (max-width: 700px) {
    .details-grid {
        grid-template-columns: 1fr;
    }
}

.export-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    width: 100%;
}

.export-btn {
    background: rgba(0, 210, 180, 0.08);
    border: 1px solid var(--border-hover);
    color: var(--teal);
    border-radius: 10px;
    padding: 14px 16px;
    font-family: var(--mono);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.export-btn:hover {
    background: rgba(0, 210, 180, 0.16);
    transform: translateY(-2px);
}

.export-card {
    margin-top: 36px;
}

.mutation-card {
    margin-top: 36px;
    padding: 28px;
}

.mutation-help {
    color: var(--muted);
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 22px;
}

.mutation-input-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 36px;
    width: 100%;
    margin: 0 0 28px 0;
}

.mutation-input-grid>div {
    min-width: 0;
    width: 100%;
}

.mutation-label {
    display: block;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--teal);
    margin-bottom: 10px;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.mutation-input-grid textarea {
    display: block;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    height: 240px;
    box-sizing: border-box;
    resize: vertical;
}

.compare-btn {
    width: 100%;
    margin: 10px 0 22px 0;
}

.mutation-table {
    margin-top: 18px;
}

@media (max-width: 800px) {

    .export-grid,
    .mutation-input-grid {
        grid-template-columns: 1fr;
    }
}

</style>