@import url('https://fonts.googleapis.com/css2?family=Instrument+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&display=swap');

/* ==========================================
   VARIABLES DEL SISTEMA (NUEVA PALETA AZUL)
   ========================================== */
:root {
    --bg-body: #f8fafc;
    --bg-surface: #ffffff;
    --border-color: #e2e8f0;
    --text-main: #334155;
    --text-muted: #64748b;
    --brand-primary: #02457a; /* Azul corporativo brillante */
    --brand-hover: #001b48;   /* Azul más oscuro para interacciones */
    --brand-text: #1e3a8a;    /* Azul marino profundo para textos y contrastes */
    --brand-soft: #eff6ff;    /* Azul muy claro para fondos tenues */
    --border-radius: 12px;
    --transition-base: all 0.3s ease;
}

/* ==========================================
   RESETEO Y BASE
   ========================================== */
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Instrument Sans', sans-serif !important;
    font-weight: 700 !important;
    color: #0f172a !important;
    letter-spacing: -0.5px;
}

/* ==========================================
   UTILERÍAS DE MARCA (NUEVAS)
   ========================================== */
.text-brand { color: var(--brand-primary) !important; }
.border-brand { border-color: var(--brand-primary) !important; }
.bg-brand-soft { background-color: var(--brand-soft) !important; }

/* ==========================================
   COMPONENTES Y UTILIDADES
   ========================================== */
.section-padding { padding: 100px 0; }
.section-title { font-size: 2.5rem; font-weight: 800 !important; margin-bottom: 1rem; }
.section-subtitle { font-size: 1.1rem; color: var(--text-muted); max-width: 700px; margin: 0 auto 3rem auto; }

.inst-card {
    background-color: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2.5rem 2rem;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    transition: var(--transition-base);
    height: 100%;
    position: relative;
    overflow: hidden;
}
.inst-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
    border-color: var(--brand-primary);
}

.btn-inst {
    background-color: var(--brand-primary) !important;
    color: #ffffff !important;
    border: 1px solid var(--brand-primary) !important;
    font-weight: 600 !important;
    padding: 12px 28px !important;
    border-radius: 8px !important;
    transition: var(--transition-base);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.btn-inst:hover {
    background-color: var(--brand-hover) !important;
    border-color: var(--brand-hover) !important;
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(37, 99, 235, 0.4);
    color: #ffffff !important;
}

.btn-outline-inst {
    background-color: transparent !important;
    color: var(--brand-text) !important;
    border: 1px solid var(--border-color) !important;
    font-weight: 600 !important;
    padding: 12px 28px !important;
    border-radius: 8px !important;
    transition: var(--transition-base);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}
.btn-outline-inst:hover {
    background-color: var(--bg-body) !important;
    border-color: var(--brand-primary) !important;
    color: var(--brand-primary) !important;
}

/* ==========================================
   NAVEGACIÓN STICKY
   ========================================== */
.navbar {
    backdrop-filter: blur(12px);
    background-color: rgba(255, 255, 255, 0.9) !important;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}
.navbar.scrolled {
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
}

/* ==========================================
   TIMELINE Y ACORDEONES
   ========================================== */
.timeline-container { position: relative; margin-top: 3rem; }
.timeline-container::before {
    content: ''; position: absolute; left: 24px; top: 0; bottom: 0;
    width: 2px; background-color: var(--border-color);
}
.timeline-step { position: relative; padding-left: 70px; margin-bottom: 3rem; }
.timeline-step:last-child { margin-bottom: 0; }
.timeline-badge {
    position: absolute; left: 0; top: 0;
    width: 50px; height: 50px; border-radius: 50%;
    background-color: var(--brand-soft); color: var(--brand-primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; font-weight: 800; font-family: 'Instrument Sans', sans-serif;
    border: 4px solid var(--bg-surface); z-index: 2;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
    transition: var(--transition-base);
}
.timeline-step:hover .timeline-badge {
    background-color: var(--brand-primary); color: #fff; transform: scale(1.1);
}

.accordion-item {
    border: 1px solid var(--border-color);
    border-radius: 8px !important;
    margin-bottom: 1rem;
    background-color: var(--bg-surface);
    overflow: hidden;
}
.accordion-button {
    font-weight: 600; color: var(--text-main); padding: 1.25rem 1.5rem;
    background-color: var(--bg-surface); box-shadow: none !important;
}
.accordion-button:not(.collapsed) {
    color: var(--brand-text); background-color: var(--brand-soft);
}
.accordion-button::after { background-size: 1rem; }

/* ==========================================
   DECORACIONES Y BACKGROUNDS
   ========================================== */
.bg-pattern {
    background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
    background-size: 24px 24px;
}
.gradient-text {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-text) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.badge-premium {
    background-color: var(--brand-soft);
    color: var(--brand-primary);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    display: inline-block;
    margin-bottom: 1rem;
}