/* ============================================
   Dorevo Institute — Base (Shared across all pages)
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-body); color: var(--color-text); background: var(--color-surface-warm); line-height: 1.6; font-size: var(--text-base); }
h1, h2, h3, h4, h5, h6 { font-family: var(--font-display); font-weight: 600; line-height: 1.25; color: var(--color-text); }
a { color: var(--color-teal); text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-coral); }

/* --- Utility --- */
.text-muted-custom { color: var(--color-text-muted); }
.font-display { font-family: var(--font-display); }
.font-body { font-family: var(--font-body); }
.font-mono { font-family: var(--font-mono); }

/* --- Typography Hierarchy --- */
.text-display { font: 700 2.5rem/1.15 var(--font-display); letter-spacing: -0.02em; }
.text-h1      { font: 700 2rem/1.2 var(--font-display); letter-spacing: -0.015em; }
.text-h2      { font: 600 1.5rem/1.25 var(--font-display); letter-spacing: -0.01em; }
.text-h3      { font: 600 1.25rem/1.3 var(--font-display); }
.text-body    { font: 400 1rem/1.6 var(--font-body); }
.text-body-sm { font: 400 0.875rem/1.5 var(--font-body); }
.text-caption  { font: 500 0.75rem/1.4 var(--font-body); letter-spacing: 0.02em; text-transform: uppercase; }

/* --- Buttons --- */
.btn-custom-primary {
    background: var(--color-coral);
    color: var(--color-white);
    border: none;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all 0.2s var(--ease-out);
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    position: relative;
    overflow: hidden;
}

.btn-custom-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.15) 100%);
    opacity: 0;
    transition: opacity 0.2s;
}

.btn-custom-primary:hover {
    background: var(--color-coral-dark);
    box-shadow: 0 4px 12px rgba(106,16,47,0.25);
    transform: translateY(-1px);
    color: var(--color-white);
}

.btn-custom-primary:hover::before { opacity: 1; }

.btn-custom-primary .material-icons-outlined {
    font-size: 16px;
}

.btn-custom-primary:active {
    background: var(--color-coral-dark);
    transform: translateY(0);
    box-shadow: none;
    color: var(--color-white);
}

.btn-custom-accent {
    background: var(--color-teal);
    color: var(--color-white);
    border: 1px solid var(--color-teal);
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: 0 6px 18px rgba(30, 68, 89, 0.14);
}
.btn-custom-accent:hover {
    background: var(--color-teal-dark);
    color: var(--color-white);
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(30, 68, 89, 0.18);
}

.btn-custom-outline {
    background: transparent;
    color: var(--color-white);
    border: 1.5px solid rgba(255,255,255,0.7);
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}
.btn-custom-outline:hover {
    border-color: var(--color-white);
    background: rgba(255,255,255,0.12);
    color: var(--color-white);
    transform: translateY(-1px);
}

.btn-outline-teal {
    background: transparent;
    color: var(--color-teal);
    border: 1.5px solid var(--color-teal);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-weight: 500;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.btn-outline-teal:hover {
    background: var(--color-teal);
    color: var(--color-white);
}

/* --- Continue Course CTA (fixed bottom-right) --- */
.btn-continue-course {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    padding: 0.875rem 2rem;
    background: var(--color-coral);
    color: #fff;
    font: 600 0.9rem/1.2 var(--font-body);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    box-shadow: 0 4px 16px rgba(106,16,47,0.3);
    transition: all 0.2s var(--ease-out);
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-continue-course:hover {
    background: var(--color-coral-dark);
    box-shadow: 0 6px 24px rgba(106,16,47,0.4);
    transform: translateY(-1px);
}

/* --- Form Inputs --- */
.input-custom {
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: var(--text-md);
    color: var(--color-text);
    background: var(--color-white);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
}
.input-custom:focus {
    border-color: var(--color-teal);
    box-shadow: 0 0 0 3px rgba(30, 68, 89, 0.08);
}
.input-custom::placeholder { color: var(--color-text-light); }
.input-custom.is-invalid { border-color: var(--color-danger); }
.invalid-feedback { color: var(--color-danger); font-size: var(--text-sm); margin-top: 0.375rem; }

/* --- Cards --- */
.card-custom {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-xs);
    transition: all 0.25s var(--ease-out);
}
.card-custom:hover { box-shadow: var(--shadow-sm); }

/* Recommended card — orange border accent */
.card-recommended {
    border: 2px solid var(--color-coral);
}

.card-recommended::after {
    content: 'Recomendado';
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.625rem;
    background: var(--color-coral);
    color: #fff;
    font: 600 0.65rem/1.3 var(--font-body);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
}

.glass-card {
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(255, 255, 255, 0.5);
    box-shadow: var(--shadow-xl);
}

/* --- Gradient Text --- */
.gradient-text {
    background: var(--gradient-brand);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* --- Section Header with Gradient --- */
.section-header-gradient {
    background: var(--gradient-brand);
    color: #fff;
    padding: 2rem 2.5rem;
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
}

.section-header-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, rgba(255,255,255,0.07) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.6;
}

/* --- Fade In Animations --- */
.fade-in-up { opacity: 0; transform: translateY(12px); animation: fadeInUp 0.5s var(--ease-out) forwards; }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }
.fade-in-up-delay-1 { animation-delay: 0.1s; }
.fade-in-up-delay-2 { animation-delay: 0.2s; }
.fade-in-up-delay-3 { animation-delay: 0.3s; }
.fade-in-up-delay-4 { animation-delay: 0.4s; }

/* --- Badges --- */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.625rem;
    border-radius: var(--radius-sm);
    font: 600 0.7rem/1.3 var(--font-body);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* Difficulty */
.badge-beginner     { background: #E8F5E9; color: #2E7D32; }
.badge-intermediate { background: #FFF3E0; color: #E65100; }
.badge-advanced     { background: #FCE4EC; color: #C62828; }
.badge-expert       { background: #F3E5F5; color: #6A1B9A; }

/* Content type */
.badge-video   { background: rgba(106,16,47,0.1); color: var(--color-coral); }
.badge-article { background: rgba(30, 68, 89, 0.1); color: var(--color-teal); }
.badge-quiz    { background: rgba(212, 162, 76, 0.1); color: #B8860B; }
.badge-live    { background: #D64545; color: #fff; animation: pulse-badge 2s infinite; }

/* Specialty */
.badge-cardiology  { background: #FFEBEE; color: #B71C1C; }
.badge-neurology   { background: #E8EAF6; color: #1A237E; }
.badge-pediatrics  { background: #E8F5E9; color: #1B5E20; }
.badge-emergency   { background: #FFF3E0; color: #BF360C; }

/* Urgency */
.badge-urgent {
    background: var(--color-coral);
    color: #fff;
    animation: pulse-badge 1.5s infinite;
}

/* Course status */
.badge-completed   { background: var(--color-success); color: #fff; }
.badge-in-progress { background: var(--color-teal); color: #fff; }
.badge-new         { background: var(--color-tinto); color: #fff; }

/* User role */
.badge-role {
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    font: 600 0.65rem/1.3 var(--font-body);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-student    { background: var(--color-surface-alt); color: var(--color-text-secondary); }
.badge-instructor { background: rgba(30, 68, 89, 0.1); color: var(--color-teal); }
.badge-expert     { background: rgba(106, 16, 47, 0.1); color: var(--color-tinto); }

/* Legacy badge-custom */
.badge-custom {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.875rem;
    border-radius: var(--radius-full);
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}
.badge-custom-accent { background: rgba(106,16,47,0.12); color: var(--color-coral); }

@keyframes pulse-badge {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* --- Alerts --- */
.alert {
    padding: 0.875rem 1.125rem;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    font-size: var(--text-base);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.alert-success { background: var(--color-success-light); border: 1px solid rgba(45,156,111,0.2); color: var(--color-success); }
.alert-danger { background: var(--color-danger-light); border: 1px solid rgba(214,69,69,0.2); color: var(--color-danger); }

/* --- Focus Visible --- */
:focus-visible { outline: 2px solid var(--color-teal); outline-offset: 2px; }

/* --- Skeleton Loading --- */
.skeleton {
    background: linear-gradient(90deg,
        var(--color-surface-alt) 25%,
        var(--color-surface) 50%,
        var(--color-surface-alt) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state::before {
    content: '✚';
    display: block;
    font-size: 3rem;
    color: var(--color-border);
    margin-bottom: 1rem;
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}