:root {
    --bg: #f4f7fb;
    --card: #ffffff;
    --text: #172033;
    --muted: #667085;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --soft: #e8f0ff;
    --border: #d9e2f1;
    --ok: #16a34a;
    --warn: #d97706;
    --danger: #dc2626;
    --shadow: 0 18px 45px rgba(20, 40, 80, .08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at top left, #dceafe 0, transparent 32%),
        linear-gradient(180deg, #f7fbff 0%, var(--bg) 100%);
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
}

.topbar {
    height: 72px;
    padding: 0 32px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255,255,255,.78);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-icon {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: var(--soft);
    font-size: 22px;
}

.brand span {
    display: block;
    color: var(--muted);
    font-size: 13px;
}

.topbar nav {
    display: flex;
    gap: 16px;
}

.container {
    width: min(1180px, calc(100% - 32px));
    margin: 32px auto;
}

.hero {
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 32px;
    align-items: center;
    min-height: 520px;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: .12em;
    color: var(--primary);
    font-weight: 800;
    font-size: 12px;
}

h1 {
    font-size: clamp(34px, 5vw, 58px);
    line-height: 1.03;
    margin: 0 0 18px;
}

h2 {
    margin-top: 0;
}

h3 {
    margin-top: 28px;
}

.lead {
    color: var(--muted);
    font-size: 19px;
    line-height: 1.6;
}

.card,
.exercise-card,
.progress-card,
.feature {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 24px;
    box-shadow: var(--shadow);
}

.login-card {
    padding: 28px;
}

label {
    display: block;
    font-weight: 700;
    margin: 14px 0 6px;
}

input,
textarea {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 13px 14px;
    font: inherit;
    background: #fff;
    outline: none;
}

input:focus,
textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, .1);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 0;
    border-radius: 14px;
    padding: 12px 18px;
    font-weight: 800;
    cursor: pointer;
    transition: transform .15s ease, background .15s ease;
    margin-top: 14px;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn.primary {
    background: var(--primary);
    color: white;
}

.btn.primary:hover {
    background: var(--primary-dark);
}

.btn.secondary {
    background: var(--soft);
    color: var(--primary);
}

.btn.disabled {
    background: #e5e7eb;
    color: #6b7280;
    cursor: not-allowed;
}

.btn.full {
    width: 100%;
}

.small {
    font-size: 13px;
    color: var(--muted);
}

.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.feature {
    padding: 24px;
}

.feature strong {
    display: block;
    font-size: 20px;
    margin-bottom: 8px;
}

.feature span {
    color: var(--muted);
}

.messages {
    margin-bottom: 18px;
}

.message {
    border-radius: 14px;
    padding: 12px 16px;
    margin-bottom: 10px;
    background: #eef2ff;
    border: 1px solid var(--border);
}

.message.success {
    background: #ecfdf3;
}

.message.warning {
    background: #fffbeb;
}

.message.danger {
    background: #fef2f2;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: stretch;
    gap: 24px;
    margin-bottom: 28px;
}

.progress-card {
    padding: 24px;
    min-width: 280px;
}

.progress-card strong {
    display: block;
    font-size: 44px;
}

.progress-card span {
    color: var(--muted);
}

.progress-bar {
    height: 10px;
    background: #e5e7eb;
    border-radius: 999px;
    margin-top: 18px;
    overflow: hidden;
}

.progress-bar div {
    height: 100%;
    background: var(--primary);
}

.exercise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.exercise-card {
    padding: 24px;
}

.exercise-card h2 {
    margin: 18px 0 8px;
}

.exercise-card p {
    color: var(--muted);
}

.exercise-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.badge,
.status {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 6px 10px;
    font-size: 12px;
    font-weight: 800;
}

.badge {
    background: var(--soft);
    color: var(--primary);
}

.status {
    background: #f3f4f6;
    color: #374151;
}

.status.en_curso {
    background: #fff7ed;
    color: var(--warn);
}

.status.completado {
    background: #ecfdf3;
    color: var(--ok);
}

.module {
    color: var(--primary) !important;
    font-weight: 700;
}

.exercise-layout {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 24px;
    align-items: start;
}

.main-exercise,
.ai-panel {
    padding: 28px;
}

.actions-row {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 22px 0;
}

.inline-form {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: start;
}

.hints details {
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 14px 16px;
    margin-bottom: 10px;
    background: #fbfdff;
}

.hints summary {
    cursor: pointer;
    font-weight: 800;
}

.submit-form textarea {
    margin-top: 10px;
}

.feedback {
    margin-top: 22px;
    border-left: 5px solid var(--ok);
    background: #ecfdf3;
    border-radius: 16px;
    padding: 16px;
}

.prompt-examples {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 16px 0;
}

.prompt-chip {
    border: 1px solid var(--border);
    background: #f8fbff;
    border-radius: 999px;
    padding: 8px 10px;
    cursor: pointer;
    color: var(--primary);
    font-weight: 700;
}

.ai-answer {
    margin-top: 18px;
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 16px;
    min-height: 120px;
    white-space: pre-wrap;
    color: #24324a;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th,
td {
    border-bottom: 1px solid var(--border);
    text-align: left;
    padding: 12px;
    vertical-align: top;
}

th {
    color: var(--muted);
    font-size: 13px;
}

.log-list {
    display: grid;
    gap: 14px;
}

.log-item {
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 16px;
    background: #fbfdff;
}

.log-item span {
    color: var(--muted);
    font-size: 12px;
}

.footer {
    color: var(--muted);
    text-align: center;
    padding: 28px;
}

@media (max-width: 900px) {
    .hero,
    .features,
    .exercise-grid,
    .exercise-layout,
    .panel-header {
        grid-template-columns: 1fr;
        display: grid;
    }

    .topbar {
        height: auto;
        padding: 16px;
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .inline-form {
        grid-template-columns: 1fr;
    }
}


.solution-box {
    border: 1px solid #bfdbfe;
    background: #eff6ff;
    border-radius: 18px;
    padding: 16px 18px;
    margin: 14px 0 24px;
}

.solution-box summary {
    cursor: pointer;
    font-weight: 900;
    color: var(--primary);
}

.solution-box ol {
    margin-bottom: 0;
}

.solution-box li {
    margin-bottom: 8px;
}

/* ===== Profesional v1 ===== */

.auth-layout {
    display: grid;
    grid-template-columns: 1.2fr .8fr;
    gap: 32px;
    align-items: center;
    min-height: 560px;
}

.auth-copy {
    padding: 28px 0;
}

.value-list {
    display: grid;
    gap: 12px;
    margin-top: 28px;
    max-width: 520px;
}

.value-list div {
    background: rgba(255,255,255,.75);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 14px 16px;
    font-weight: 800;
}

.center {
    text-align: center;
}

select {
    width: 100%;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 13px 14px;
    font: inherit;
    background: #fff;
    outline: none;
}

select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, .1);
}

.kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
    margin-bottom: 28px;
}

.kpi-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 22px;
    padding: 22px;
    box-shadow: var(--shadow);
}

.kpi-card span {
    color: var(--muted);
    font-weight: 700;
    font-size: 13px;
}

.kpi-card strong {
    display: block;
    font-size: 38px;
    margin-top: 6px;
}

.module-section {
    margin: 34px 0;
}

.module-heading {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 16px;
}

.module-heading h2 {
    margin: 0;
}

.module-heading span {
    color: var(--muted);
    font-weight: 800;
}

.learning-path {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin: 24px 0;
}

.learning-path div {
    background: #f8fbff;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 14px;
}

.learning-path strong {
    width: 28px;
    height: 28px;
    border-radius: 999px;
    background: var(--primary);
    color: #fff;
    display: inline-grid;
    place-items: center;
    margin-bottom: 8px;
}

.learning-path span {
    display: block;
    color: var(--muted);
    font-weight: 800;
    font-size: 13px;
}

.task-list li {
    margin-bottom: 10px;
}

.role-pill {
    display: inline-flex;
    border-radius: 999px;
    padding: 6px 10px;
    background: var(--soft);
    color: var(--primary);
    font-size: 12px;
    font-weight: 900;
    text-transform: uppercase;
}

.actions-admin {
    display: flex;
    align-items: center;
}

.admin-user-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-bottom: 22px;
}

.admin-user-grid div {
    background: #f8fbff;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 16px;
}

.admin-user-grid strong {
    display: block;
    margin-bottom: 8px;
}

.admin-user-grid span {
    color: var(--muted);
}

.role-form {
    margin-top: 18px;
}

@media (max-width: 900px) {
    .auth-layout,
    .kpi-grid,
    .learning-path,
    .admin-user-grid {
        grid-template-columns: 1fr;
    }
}