/* ═══════════════════════════════════════════════════════
   Aprender a Dibujar — Tema suave para niños
   Colores pastel no agresivos para evitar cansancio visual
   ═══════════════════════════════════════════════════════ */

:root {
    --color-fondo: #F5F0EB;
    --color-card: #FFFFFF;
    --color-primario: #7BAFD4;
    --color-primario-hover: #6A9DC2;
    --color-secundario: #A8D5BA;
    --color-secundario-hover: #93C9A8;
    --color-acento: #F7C59F;
    --color-rosa: #E8A0BF;
    --color-lila: #B5B8F0;
    --color-amarillo: #F9E79F;
    --color-texto: #4A4A4A;
    --color-texto-claro: #7A7A7A;
    --color-borde: #E0DAD3;
    --color-error: #E07070;
    --color-exito: #7BC07B;
    --sombra-suave: 0 4px 16px rgba(0, 0, 0, 0.06);
    --sombra-card: 0 6px 20px rgba(0, 0, 0, 0.05);
    --radio-borde: 16px;
    --radio-boton: 12px;
}

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

body {
    font-family: 'Nunito', 'Segoe UI', 'Arial', sans-serif;
    background-color: var(--color-fondo);
    color: var(--color-texto);
    line-height: 1.6;
    min-height: 100vh;
}

/* ─── Navbar ──────────────────────────────────────────── */

.navbar {
    background: var(--color-card);
    padding: 12px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--sombra-suave);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--color-texto);
    font-size: 1.3rem;
    font-weight: 700;
}

.navbar-brand .emoji {
    font-size: 1.6rem;
}

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

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
}

.navbar-user span {
    font-weight: 600;
    color: var(--color-texto);
}

.btn-logout {
    background: none;
    border: 2px solid var(--color-borde);
    padding: 6px 14px;
    border-radius: var(--radio-boton);
    color: var(--color-texto-claro);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s;
}

.btn-logout:hover {
    border-color: var(--color-error);
    color: var(--color-error);
}

/* ─── Contenedor principal ─────────────────────────────── */

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 24px 16px;
}

.container-narrow {
    max-width: 480px;
    margin: 0 auto;
    padding: 24px 16px;
}

/* ─── Cards ────────────────────────────────────────────── */

.card {
    background: var(--color-card);
    border-radius: var(--radio-borde);
    box-shadow: var(--sombra-card);
    padding: 28px;
    margin-bottom: 20px;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.card-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-texto);
}

/* ─── Formularios ──────────────────────────────────────── */

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-texto);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--color-borde);
    border-radius: var(--radio-boton);
    font-size: 1rem;
    color: var(--color-texto);
    background: var(--color-fondo);
    transition: border-color 0.2s;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primario);
    background: white;
}

.form-control::placeholder {
    color: var(--color-texto-claro);
}

input[type="file"].form-control {
    padding: 10px 12px;
    cursor: pointer;
}

input[type="color"].form-color {
    width: 50px;
    height: 40px;
    border: 2px solid var(--color-borde);
    border-radius: 8px;
    padding: 2px;
    cursor: pointer;
    background: var(--color-fondo);
}

input[type="range"].form-range {
    width: 100%;
    accent-color: var(--color-primario);
}

input[type="number"].form-number {
    width: 100px;
    padding: 8px 12px;
    border: 2px solid var(--color-borde);
    border-radius: 8px;
    font-size: 0.95rem;
    text-align: center;
}

/* ─── Checkboxes estilizados ───────────────────────────── */

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    padding: 6px 0;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--color-primario);
    cursor: pointer;
}

/* ─── Botones ──────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--radio-boton);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    font-family: inherit;
}

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

.btn-primary:hover {
    background: var(--color-primario-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(123, 175, 212, 0.3);
}

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

.btn-secondary:hover {
    background: var(--color-secundario-hover);
    transform: translateY(-1px);
}

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

.btn-accent:hover {
    background: #f0b48a;
    transform: translateY(-1px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--color-borde);
    color: var(--color-texto);
}

.btn-outline:hover {
    border-color: var(--color-primario);
    color: var(--color-primario);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.85rem;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

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

.btn-danger:hover {
    background: #d05050;
}

/* ─── Alertas ──────────────────────────────────────────── */

.alert {
    padding: 14px 18px;
    border-radius: var(--radio-boton);
    margin-bottom: 18px;
    font-size: 0.95rem;
    font-weight: 500;
}

.alert-error {
    background: #FDE8E8;
    color: var(--color-error);
    border: 1px solid #F5C6C6;
}

.alert-success {
    background: #E8F5E8;
    color: #4A8C4A;
    border: 1px solid #C6E8C6;
}

.alert-info {
    background: #E8F0F5;
    color: var(--color-primario);
    border: 1px solid #C6D8E8;
}

/* ─── Página de login/registro ─────────────────────────── */

.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #F5F0EB 0%, #E8F0F5 50%, #F0E8F0 100%);
}

.auth-card {
    background: var(--color-card);
    border-radius: 24px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.08);
    padding: 40px;
    width: 100%;
    max-width: 440px;
}

.auth-title {
    text-align: center;
    margin-bottom: 8px;
    font-size: 1.8rem;
    color: var(--color-texto);
}

.auth-emoji {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 12px;
}

.auth-subtitle {
    text-align: center;
    color: var(--color-texto-claro);
    margin-bottom: 28px;
    font-size: 0.95rem;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 0.9rem;
    color: var(--color-texto-claro);
}

.auth-footer a {
    color: var(--color-primario);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* ─── Sesiones de dibujo (grid) ────────────────────────── */

.sessions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 18px;
}

.session-card {
    background: var(--color-card);
    border-radius: var(--radio-borde);
    box-shadow: var(--sombra-card);
    padding: 20px;
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
    border: 2px solid transparent;
}

.session-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.08);
    border-color: var(--color-primario);
}

.session-card-icon {
    font-size: 2rem;
    margin-bottom: 10px;
}

.session-card-title {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.session-card-meta {
    font-size: 0.85rem;
    color: var(--color-texto-claro);
}

.session-card-count {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--color-fondo);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-top: 10px;
    color: var(--color-texto-claro);
}

/* ─── Card nueva sesión ────────────────────────────────── */

.session-card-new {
    border: 2px dashed var(--color-borde);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 160px;
    color: var(--color-texto-claro);
    background: transparent;
    box-shadow: none;
}

.session-card-new:hover {
    border-color: var(--color-secundario);
    color: var(--color-secundario);
    background: rgba(168, 213, 186, 0.05);
    box-shadow: none;
}

.session-card-new .plus-icon {
    font-size: 2.5rem;
    margin-bottom: 8px;
    font-weight: 300;
}

/* ─── Visor de etapas ──────────────────────────────────── */

.visor-container {
    text-align: center;
    padding: 16px 0;
}

.visor-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.visor-btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: var(--color-primario);
    color: white;
    font-size: 1.3rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.visor-btn:hover {
    background: var(--color-primario-hover);
    transform: scale(1.1);
}

.visor-btn:disabled {
    background: var(--color-borde);
    cursor: not-allowed;
    transform: none;
}

.visor-counter {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-texto-claro);
    min-width: 120px;
}

.visor-img {
    max-width: 100%;
    max-height: 500px;
    border-radius: 12px;
    border: 2px solid var(--color-borde);
    transition: transform 0.2s;
    cursor: zoom-in;
}

.visor-img.zoomed {
    transform: scale(1.8);
    cursor: zoom-out;
}

/* ─── Galería de imágenes ──────────────────────────────── */

.images-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
    margin-top: 16px;
}

.image-thumb {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 1;
    cursor: pointer;
    border: 2px solid var(--color-borde);
    transition: all 0.2s;
}

.image-thumb:hover {
    border-color: var(--color-primario);
    transform: translateY(-2px);
    box-shadow: var(--sombra-suave);
}

.image-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-thumb-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.45);
    color: white;
    padding: 6px 10px;
    font-size: 0.8rem;
    text-align: center;
}

/* ─── Vacío / placeholder ──────────────────────────────── */

.empty-state {
    text-align: center;
    padding: 48px 20px;
    color: var(--color-texto-claro);
}

.empty-state .emoji {
    font-size: 3rem;
    margin-bottom: 12px;
}

.empty-state p {
    margin-bottom: 16px;
    font-size: 1rem;
}

/* ─── Grid de opciones ─────────────────────────────────── */

.options-row {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.options-row .option-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.options-row .option-item label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-texto-claro);
}

/* ─── Motor badge ──────────────────────────────────────── */

.motor-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--color-fondo);
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--color-texto-claro);
    font-weight: 600;
}

.motor-badge .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-secundario);
}

/* ─── Nota / tip ───────────────────────────────────────── */

.tip {
    font-size: 0.85rem;
    color: var(--color-texto-claro);
    padding: 10px 14px;
    background: var(--color-fondo);
    border-radius: 10px;
    margin-top: 12px;
}

/* ─── Separador ────────────────────────────────────────── */

.divider {
    border: none;
    border-top: 1px solid var(--color-borde);
    margin: 20px 0;
}

/* ─── Utilidades ───────────────────────────────────────── */

.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }

/* ─── Responsive ───────────────────────────────────────── */

@media (max-width: 600px) {
    .container { padding: 16px 12px; }
    .auth-card { padding: 28px 20px; }
    .card { padding: 20px; }
    .navbar { padding: 10px 14px; }
    .navbar-brand { font-size: 1.1rem; }
    .sessions-grid { grid-template-columns: 1fr; }
    .images-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
    .options-row { flex-direction: column; align-items: flex-start; }
}