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

:root {
    --bg:          #09090f;
    --surface:     #111118;
    --surface-2:   #18181f;
    --border:      rgba(255,255,255,0.07);
    --border-hover:rgba(255,255,255,0.14);
    --accent:      #e8ff47;
    --accent-dim:  rgba(232,255,71,0.12);
    --accent-glow: rgba(232,255,71,0.25);
    --spam:        #ff4f6a;
    --spam-dim:    rgba(255,79,106,0.12);
    --ham:         #3dffa0;
    --ham-dim:     rgba(61,255,160,0.12);
    --text-1:      #f0f0f8;
    --text-2:      #8888a8;
    --text-3:      #55556a;
    --radius:      16px;
    --radius-sm:   10px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Syne', sans-serif;
    background: var(--bg);
    color: var(--text-1);
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 48px 16px 80px;
    position: relative;
    overflow-x: hidden;
}

/* ─── Background Effects ────────────────────────────────────── */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: 0;
}

.bg-glow {
    position: fixed;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse at center,
        rgba(232,255,71,0.05) 0%,
        transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* ─── Container ─────────────────────────────────────────────── */
.container {
    width: 100%;
    max-width: 680px;
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* ─── Header ────────────────────────────────────────────────── */
.header {
    text-align: center;
    padding: 12px 0 8px;
    animation: fadeDown 0.6s ease both;
}

.header-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 16px;
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    color: var(--text-2);
    letter-spacing: 0.05em;
    margin-bottom: 24px;
    text-transform: uppercase;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--ham);
    box-shadow: 0 0 8px var(--ham);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.title {
    font-family: 'Instrument Serif', serif;
    font-size: clamp(52px, 9vw, 80px);
    font-weight: 400;
    line-height: 1;
    letter-spacing: -0.02em;
    color: var(--text-1);
    margin-bottom: 12px;
}

.title em {
    font-style: italic;
    color: var(--accent);
}

.subtitle {
    font-size: 14px;
    color: var(--text-2);
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* ─── Main Card ─────────────────────────────────────────────── */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    position: relative;
    transition: border-color 0.2s;
    animation: fadeUp 0.6s ease 0.1s both;
}

.card:hover { border-color: var(--border-hover); }

.card-label {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.12em;
    color: var(--text-3);
    text-transform: uppercase;
    margin-bottom: 14px;
}

/* ─── Textarea ──────────────────────────────────────────────── */
textarea {
    width: 100%;
    min-height: 148px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-1);
    font-family: 'DM Mono', monospace;
    font-size: 14px;
    line-height: 1.7;
    padding: 16px;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

textarea::placeholder { color: var(--text-3); }

textarea:focus {
    border-color: rgba(232,255,71,0.3);
    box-shadow: 0 0 0 3px rgba(232,255,71,0.06);
}

.textarea-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 16px;
    gap: 12px;
}

.char-hint {
    font-size: 12px;
    color: var(--text-3);
    font-family: 'DM Mono', monospace;
}

/* ─── Primary Button ────────────────────────────────────────── */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    background: var(--accent);
    color: #0a0a0a;
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 24px;
    font-family: 'Syne', sans-serif;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.03em;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s, background 0.15s;
    white-space: nowrap;
    flex-shrink: 0;
}

.btn-primary:hover {
    background: #f0ff60;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:active { transform: translateY(0); }

.btn-icon {
    font-size: 16px;
    transition: transform 0.2s;
}

.btn-primary:hover .btn-icon { transform: translateX(3px); }

/* ─── Section Divider ───────────────────────────────────────── */
.section-label {
    display: flex;
    align-items: center;
    gap: 14px;
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.12em;
    color: var(--text-3);
    text-transform: uppercase;
    animation: fadeUp 0.6s ease 0.2s both;
}

.section-line {
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* ─── Sample Buttons ────────────────────────────────────────── */
.samples {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    animation: fadeUp 0.6s ease 0.25s both;
}

.sample-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    cursor: pointer;
    text-align: left;
    transition: border-color 0.2s, background 0.2s, transform 0.15s;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.sample-btn:hover { transform: translateY(-2px); }

.spam-sample:hover {
    border-color: var(--spam);
    background: var(--spam-dim);
}

.ham-sample:hover {
    border-color: var(--ham);
    background: var(--ham-dim);
}

.sample-tag {
    font-family: 'DM Mono', monospace;
    font-size: 9px;
    font-weight: 500;
    letter-spacing: 0.12em;
    border-radius: 4px;
    padding: 2px 7px;
    display: inline-block;
    width: fit-content;
}

.spam-sample .sample-tag {
    background: var(--spam-dim);
    color: var(--spam);
    border: 1px solid rgba(255,79,106,0.25);
}

.ham-sample .sample-tag {
    background: var(--ham-dim);
    color: var(--ham);
    border: 1px solid rgba(61,255,160,0.25);
}

.sample-text {
    font-size: 13px;
    color: var(--text-2);
    font-weight: 600;
    font-family: 'Syne', sans-serif;
}

/* ─── Result Box ────────────────────────────────────────────── */
#result {
    animation: fadeUp 0.5s ease both;
}

#result:empty { display: none; }

/* These classes will be set by script.js on #result */
#result .result-card {
    border-radius: var(--radius);
    padding: 28px;
    border: 1px solid;
    display: flex;
    flex-direction: column;
    gap: 16px;
    animation: scaleIn 0.35s cubic-bezier(0.34,1.4,0.64,1) both;
}

#result .result-card.is-spam {
    background: var(--spam-dim);
    border-color: rgba(255,79,106,0.3);
}

#result .result-card.is-ham {
    background: var(--ham-dim);
    border-color: rgba(61,255,160,0.3);
}

#result .result-verdict {
    display: flex;
    align-items: center;
    gap: 14px;
}

#result .result-icon {
    font-size: 32px;
}

#result .result-label {
    font-family: 'DM Mono', monospace;
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-2);
    margin-bottom: 2px;
}

#result .result-title {
    font-family: 'Instrument Serif', serif;
    font-size: 36px;
    font-weight: 400;
    line-height: 1;
}

#result .result-card.is-spam .result-title { color: var(--spam); }
#result .result-card.is-ham  .result-title { color: var(--ham); }

#result .result-message {
    font-size: 14px;
    color: var(--text-2);
    font-family: 'DM Mono', monospace;
    font-style: italic;
    padding: 12px 16px;
    background: rgba(0,0,0,0.2);
    border-radius: 8px;
    line-height: 1.6;
    border-left: 2px solid var(--border);
}

/* ─── Footer ────────────────────────────────────────────────── */
.footer {
    text-align: center;
    font-family: 'DM Mono', monospace;
    font-size: 11px;
    color: var(--text-3);
    letter-spacing: 0.06em;
    padding-top: 8px;
    animation: fadeUp 0.6s ease 0.35s both;
}

/* ─── Keyframes ─────────────────────────────────────────────── */
@keyframes fadeDown {
    from { opacity: 0; transform: translateY(-16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.96); }
    to   { opacity: 1; transform: scale(1); }
}

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 480px) {
    body { padding: 32px 12px 60px; }

    .samples {
        grid-template-columns: 1fr 1fr;
    }

    .textarea-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-primary {
        justify-content: center;
    }

    .char-hint { text-align: center; }
}