:root {
    --primary: #0f766e;
    --primary-dark: #0d5f58;
    --bg: #f1f5f9;
    --surface: #ffffff;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --error: #dc2626;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

.hidden { display: none !important; }

/* ── Views ── */
.view { min-height: 100vh; }

/* ── Login ── */
#login-view {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.login-card {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px 32px;
    width: 100%;
    max-width: 360px;
    text-align: center;
}

.login-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 28px;
    color: var(--text);
}

#login-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

input[type="password"] {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.15s;
}

input[type="password"]:focus { border-color: var(--primary); }

/* ── Buttons ── */
button[type="submit"],
#run-btn {
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
    width: 100%;
}

button[type="submit"]:hover,
#run-btn:hover { background: var(--primary-dark); }

button[type="submit"]:disabled,
#run-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.error {
    color: var(--error);
    font-size: 0.875rem;
    margin-top: 8px;
}

/* ── Skills view ── */
#skills-view header,
#run-view header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    position: sticky;
    top: 0;
    z-index: 10;
}

#skills-view header h1,
#run-view header h1 {
    font-size: 1.1rem;
    font-weight: 600;
}

.logout {
    background: none;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    padding: 6px 14px;
    font-size: 0.875rem;
    color: var(--text-muted);
    cursor: pointer;
    white-space: nowrap;
    transition: border-color 0.15s, color 0.15s;
}

.logout:hover { border-color: var(--text-muted); color: var(--text); }

.back {
    background: none;
    border: none;
    font-size: 1rem;
    color: var(--primary);
    cursor: pointer;
    padding: 4px 0;
    white-space: nowrap;
}

.back:hover { text-decoration: underline; }

/* ── Skills grid ── */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 24px;
}

@media (min-width: 480px) {
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
    .skills-grid { grid-template-columns: repeat(3, 1fr); max-width: 900px; margin: 0 auto; }
}

.skill-card {
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    cursor: pointer;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
    text-align: left;
}

.skill-card:hover {
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(15, 118, 110, 0.12);
    transform: translateY(-1px);
}

.skill-card:active { transform: translateY(0); }

.skill-card h2 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.skill-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ── Run view ── */
.run-body {
    padding: 24px;
    max-width: 720px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    resize: vertical;
    outline: none;
    transition: border-color 0.15s;
}

textarea:focus { border-color: var(--primary); }

/* ── Output ── */
.output {
    background: var(--surface);
    border: 1.5px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 0.9375rem;
    line-height: 1.7;
    min-height: 120px;
    color: var(--text);
}

.output.streaming { border-color: var(--primary); }

.output-error { color: var(--error); }