/* Profe Juan — estilos base
   Paleta: navy #14213D | teal #2C7A7B | slate #5A6B7B | paper #F5F7FA
*/

:root {
    --navy: #14213D;
    --teal: #2C7A7B;
    --teal-dark: #1F5B5C;
    --slate: #5A6B7B;
    --paper: #F5F7FA;
    --white: #FFFFFF;
    --ink: #16202B;
    --border: #E2E8EF;

    --serif: 'Source Serif 4', Georgia, serif;
    --sans: 'IBM Plex Sans', -apple-system, Segoe UI, Roboto, sans-serif;
    --max-width: 1080px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: var(--sans);
    color: var(--ink);
    background: var(--paper);
    line-height: 1.55;
}

h1, h2, h3 { font-family: var(--serif); font-weight: 600; color: var(--navy); margin: 0 0 0.5em; line-height: 1.2; }
h1 { font-size: clamp(1.9rem, 3.6vw, 2.8rem); }
h2 { font-size: 1.6rem; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }

.wrap { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

.eyebrow { font-size: 0.9rem; color: var(--teal); font-weight: 500; margin-bottom: 0.5em; }

/* Header */
.site-header { background: var(--navy); }
.header-row { display: flex; align-items: center; justify-content: space-between; height: 68px; flex-wrap: wrap; gap: 8px; }
.brand { font-family: var(--serif); font-size: 1.2rem; font-weight: 700; color: var(--white); display: flex; align-items: center; }
.brand-logo { height: 38px; width: auto; display: block; }
.main-nav { display: flex; align-items: center; gap: 22px; }
.main-nav a { color: #C9D6E3; font-size: 0.95rem; padding: 4px 2px; border-bottom: 1px solid transparent; }
.main-nav a:hover, .main-nav a.is-active { color: var(--white); border-color: var(--teal); }
.nav-user { color: #C9D6E3; font-size: 0.9rem; }
.btn-link { color: var(--white) !important; border: 1px solid var(--teal); padding: 6px 14px; }

/* Buttons */
.btn { display: inline-block; padding: 12px 24px; font-weight: 500; border: 1px solid transparent; cursor: pointer; font-family: var(--sans); font-size: 0.96rem; }
.btn-primary { background: var(--teal); color: var(--white); }
.btn-primary:hover { background: var(--teal-dark); }
.btn-outline { background: transparent; color: var(--navy); border-color: var(--navy); }

/* Hero (perfil público del docente) */
.hero { background: var(--navy); color: var(--white); padding: 64px 0 0; position: relative; overflow: hidden; }
.hero h1 { color: var(--white); margin-bottom: 0.15em; }
.hero .rol { color: #9FC4C4; font-size: 1.05rem; margin-bottom: 1em; }
.hero .bio { max-width: 620px; color: #C9D6E3; margin-top: 1.2em; }

.hero-pattern {
    position: absolute; inset: 0;
    background-image: radial-gradient(circle, rgba(159,196,196,0.16) 1px, transparent 1px);
    background-size: 24px 24px;
    -webkit-mask-image: linear-gradient(to bottom, transparent, black 25%, black 75%, transparent);
    mask-image: linear-gradient(to bottom, transparent, black 25%, black 75%, transparent);
    pointer-events: none;
}

.hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.15fr 1fr; gap: 40px; align-items: center; padding-bottom: 48px; }
.hero-copy { min-width: 0; }

.hero-instructor-row { display: flex; align-items: center; gap: 10px; margin-bottom: 1.1em; }
.hero-avatar { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; border: 2px solid var(--teal); flex-shrink: 0; }
.hero-avatar-placeholder {
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(155deg, var(--teal) 0%, var(--navy) 130%);
    color: var(--white); font-family: var(--serif); font-size: 0.95rem; font-weight: 700;
}
.hero-instructor-name { color: #C9D6E3; font-size: 0.92rem; font-weight: 500; }

.hero h1 { color: var(--white); margin-bottom: 0.4em; font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
.hero .bio { max-width: 620px; color: #C9D6E3; margin-top: 1.2em; }

.hero-cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 1.6em; }
.btn-outline-light { background: transparent; color: var(--white); border: 1px solid rgba(255,255,255,0.4); padding: 12px 24px; font-weight: 500; }
.btn-outline-light:hover { border-color: var(--white); }

.hero-visual { position: relative; }
.hero-visual img { width: 100%; height: auto; display: block; }

.hero-pattern {
    position: absolute; inset: 0;
    background-image: radial-gradient(circle, rgba(159,196,196,0.16) 1px, transparent 1px);
    background-size: 24px 24px;
    -webkit-mask-image: linear-gradient(to bottom, transparent, black 25%, black 75%, transparent);
    mask-image: linear-gradient(to bottom, transparent, black 25%, black 75%, transparent);
    pointer-events: none;
}

.especialidad { color: #C9D6E3; font-size: 1.12rem; max-width: 560px; margin-bottom: 1em; }

.hero-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 0.9em; }
.experiencia-badge { display: inline-block; background: rgba(44,122,123,0.22); color: #BFE3E1; font-size: 0.85rem; font-weight: 500; padding: 5px 13px; }
.titulo-badge { display: inline-block; background: rgba(255,255,255,0.08); color: #C9D6E3; font-size: 0.85rem; font-weight: 500; padding: 5px 13px; }

.areas-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 0.6em; }
.area-badge {
    display: inline-flex; align-items: center; gap: 6px;
    border: 1px solid rgba(159,196,196,0.4); color: #9FC4C4;
    font-size: 0.82rem; font-weight: 500; padding: 5px 12px 5px 10px;
}

.instituciones-strip { position: relative; z-index: 1; border-top: 1px solid rgba(255,255,255,0.1); background: rgba(0,0,0,0.15); }
.instituciones-inner { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; padding: 16px 24px; }
.instituciones-inner > * { margin-right: 18px; }
.instituciones-inner > *:last-child { margin-right: 0; }
.instituciones-label { color: #7E9BB0; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
.institucion-item { color: #C9D6E3; font-size: 0.9rem; font-weight: 600; font-family: var(--serif); }

/* Áreas de enseñanza — tarjetas con ícono */
.section-areas { text-align: left; }
.areas-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 18px; margin-top: 1.8em; }
.area-card { background: var(--white); border: 1px solid var(--border); overflow: hidden; text-align: center; }
.area-card-img { width: 100%; height: auto; display: block; }
.area-card-icon-generico { color: var(--teal-dark); padding: 28px 0 8px; }
.area-card-label { font-weight: 600; color: var(--navy); padding-bottom: 16px; margin: 0; }

/* Testimonios */
.section-testimonios { background: var(--paper); }
.testimonios-nota { color: var(--slate); font-size: 0.85rem; font-style: italic; margin-top: -0.6em; }
.testimonios-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 20px; margin-top: 1.6em; }
.testimonio-card { background: var(--white); border: 1px solid var(--border); padding: 26px; }
.testimonio-quote-icon { color: var(--teal); opacity: 0.5; margin-bottom: 10px; }
.testimonio-texto { color: var(--ink); font-size: 0.95rem; min-height: 72px; }
.testimonio-autor { display: flex; align-items: center; gap: 10px; margin-top: 14px; }
.testimonio-avatar {
    width: 38px; height: 38px; border-radius: 50%; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    background: var(--navy); color: var(--white); font-family: var(--serif); font-weight: 700;
}
.testimonio-nombre { font-weight: 600; color: var(--navy); margin: 0; font-size: 0.9rem; }
.testimonio-curso { color: var(--slate); margin: 0; font-size: 0.82rem; }

/* Cursos con imagen de portada */
.curso-card-con-imagen { padding: 0; overflow: hidden; }
.curso-card-portada { width: 100%; height: 150px; object-fit: cover; display: block; }
.curso-card-portada-generica { display: flex; align-items: center; justify-content: center; background: var(--paper); color: var(--teal); }
.curso-card-body { padding: 22px; display: flex; flex-direction: column; gap: 10px; flex-grow: 1; }
.curso-card-con-imagen h3 { margin-bottom: 0; }
.curso-card-con-imagen p { margin-bottom: 0; flex-grow: 1; }

@media (max-width: 860px) {
    .hero-grid { grid-template-columns: 1fr; }
    .hero-visual { order: -1; max-width: 420px; margin: 0 auto; }
}

.formacion-list { list-style: none; padding: 0; margin: 1.2em 0 0; }
.formacion-list li { padding: 12px 0; border-top: 1px solid var(--border); color: var(--ink); }
.formacion-list li:last-child { border-bottom: 1px solid var(--border); }

.section { padding: 56px 0; }

/* Filosofía de enseñanza con ilustración */
.filosofia-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 40px; align-items: center; }
.filosofia-img { width: 100%; max-width: 320px; height: auto; display: block; margin: 0 auto; }

/* Banner de cita, contenido con margen */
.quote-banner { padding: 40px 24px; background: var(--paper); }
.quote-banner img { max-width: 780px; width: 100%; height: auto; display: block; margin: 0 auto; box-shadow: 0 8px 24px rgba(11,27,43,0.18); }

/* Promo de seguimiento de progreso */
.progreso-promo { background: var(--white); }
.progreso-promo-inner { padding: 48px 24px; display: grid; grid-template-columns: 1fr 1.1fr; gap: 40px; align-items: center; }
.progreso-promo-inner img { width: 100%; height: auto; display: block; }
.progreso-promo-copy h2 { margin-bottom: 0.5em; }
.progreso-promo-copy p { color: var(--slate); }

@media (max-width: 760px) {
    .progreso-promo-inner { grid-template-columns: 1fr; }
    .progreso-promo-inner img { max-width: 360px; margin: 0 auto; }
}

@media (max-width: 760px) {
    .filosofia-grid { grid-template-columns: 1fr; }
    .filosofia-img { order: -1; }
}
.section-narrow { max-width: 720px; }

/* Tarjetas de curso */
.cursos-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; margin-top: 1.6em; }
.curso-card { background: var(--white); border: 1px solid var(--border); padding: 24px; display: flex; flex-direction: column; gap: 10px; }
.curso-card h3 { font-size: 1.1rem; margin-bottom: 0; }
.curso-card p { color: var(--slate); font-size: 0.94rem; margin-bottom: 0; flex-grow: 1; }
.badge { align-self: flex-start; font-size: 0.75rem; font-weight: 600; padding: 3px 10px; border-radius: 2px; text-transform: uppercase; letter-spacing: 0.03em; }
.badge-publico { background: #E4F3F2; color: var(--teal-dark); }
.badge-privado { background: #EEF1F5; color: var(--slate); }
.curso-card .ver { color: var(--teal-dark); font-weight: 500; border-bottom: 1px solid var(--teal); width: fit-content; }

.curso-card-links { display: flex; flex-wrap: wrap; gap: 6px 14px; margin-top: 4px; border-top: 1px solid var(--border); padding-top: 12px; }
.curso-card-links a { font-size: 0.85rem; color: var(--teal-dark); font-weight: 500; }
.curso-card-links a:hover { text-decoration: underline; }

/* Formularios */
.form-box { background: var(--white); border: 1px solid var(--border); padding: 32px; max-width: 420px; margin: 0 auto; }
.form-box.wide { max-width: 640px; }

.login-grid { display: grid; grid-template-columns: 420px 1fr; gap: 40px; align-items: center; max-width: 980px; margin: 0 auto; }
.login-promo { max-width: 420px; }
.login-promo img { width: 100%; height: auto; border-radius: 4px; box-shadow: 0 8px 24px rgba(11,27,43,0.15); }

@media (max-width: 820px) {
    .login-grid { grid-template-columns: 1fr; }
    .login-promo { order: -1; max-width: 380px; margin: 0 auto; }
}
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 0.88rem; font-weight: 500; margin-bottom: 6px; color: var(--navy); }
.field input, .field textarea, .field select {
    width: 100%; padding: 10px 12px; border: 1px solid var(--border); font-family: var(--sans); font-size: 0.95rem; background: var(--paper);
}
.field textarea { resize: vertical; min-height: 90px; }
.alert { padding: 12px 16px; margin-bottom: 18px; font-size: 0.9rem; }
.alert-error { background: #FCEAEA; color: #A5333B; border: 1px solid #F3C6C8; }
.alert-success { background: #E4F3F2; color: var(--teal-dark); border: 1px solid #BFE3E1; }

/* Tablas de administración */
table.admin-table { width: 100%; border-collapse: collapse; margin-top: 1.4em; background: var(--white); }
table.admin-table th, table.admin-table td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--border); font-size: 0.92rem; }
table.admin-table th { color: var(--slate); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.02em; }

/* Lista de materiales */
.material-list { list-style: none; padding: 0; margin: 1em 0 0; }
.material-list li { display: flex; justify-content: space-between; align-items: center; padding: 14px 18px; background: var(--white); border: 1px solid var(--border); margin-bottom: 8px; }
.material-list a.descargar { color: var(--teal-dark); font-weight: 500; }

.site-footer { padding: 24px 0; color: var(--slate); font-size: 0.85rem; border-top: 1px solid var(--border); margin-top: 48px; }

.admin-subnav { display: flex; gap: 28px; border-bottom: 1px solid var(--border); margin-bottom: 2em; padding-top: 8px; }
.admin-subnav a { padding: 10px 2px; color: var(--slate); font-size: 0.95rem; font-weight: 500; border-bottom: 2px solid transparent; }
.admin-subnav a:hover { color: var(--navy); }
.admin-subnav a.is-active { color: var(--navy); border-color: var(--teal); }

.profile-photo-preview { width: 96px; height: 96px; object-fit: cover; border: 1px solid var(--border); margin-bottom: 12px; display: block; }
.logo-preview { max-height: 60px; background: var(--navy); padding: 10px 16px; margin-bottom: 12px; display: block; }

.empty-state { color: var(--slate); font-style: italic; }

@media (max-width: 640px) {
    .header-row { flex-direction: column; align-items: flex-start; padding: 12px 0; height: auto; }
    .main-nav { flex-wrap: wrap; gap: 12px; }
}

/* Mensajería / chat interno */
.chat-box { display: flex; flex-direction: column; gap: 12px; max-height: 480px; overflow-y: auto; padding: 18px; background: var(--white); border: 1px solid var(--border); margin-top: 1.2em; }
.chat-burbuja { max-width: 75%; padding: 10px 14px; border-radius: 4px; }
.chat-estudiante { align-self: flex-end; background: var(--teal); color: var(--white); }
.chat-docente { align-self: flex-start; background: var(--paper); color: var(--ink); border: 1px solid var(--border); }
.chat-texto { margin: 0 0 4px; font-size: 0.94rem; white-space: pre-wrap; }
.chat-fecha { font-size: 0.72rem; opacity: 0.75; }
.chat-form { display: flex; gap: 10px; margin-top: 14px; align-items: flex-end; }
.chat-form textarea { flex: 1; padding: 10px 12px; border: 1px solid var(--border); font-family: var(--sans); font-size: 0.94rem; resize: vertical; }

.mensajes-layout { display: grid; grid-template-columns: 260px 1fr; gap: 24px; margin-top: 1.4em; align-items: start; }
.mensajes-lista { background: var(--white); border: 1px solid var(--border); }
.conversacion-item { display: flex; justify-content: space-between; align-items: center; padding: 14px 16px; border-bottom: 1px solid var(--border); color: var(--ink); }
.conversacion-item:last-child { border-bottom: none; }
.conversacion-item:hover, .conversacion-item.is-active { background: var(--paper); }
.no-leidos-badge { background: var(--teal); color: var(--white); font-size: 0.72rem; font-weight: 700; padding: 2px 7px; border-radius: 50px; }
.mensajes-hilo { background: var(--white); border: 1px solid var(--border); padding: 20px; }

@media (max-width: 720px) {
    .mensajes-layout { grid-template-columns: 1fr; }
}