/* ══════════════════════════════════════════════════
   InstiConnect – Registro
   ══════════════════════════════════════════════════ */

:root {
    --red:       #c0392b;
    --red-dark:  #96281b;
    --red-glow:  rgba(192, 57, 43, 0.18);
    --dark:      #1e1e2e;
    --text:      #1a1a2e;
    --muted:     #6b7280;
    --border:    #e5e7eb;
    --bg-input:  #f9fafb;
    --card-bg:   #ffffff;
    --radius:    14px;
    --shadow:    0 20px 60px rgba(0, 0, 0, 0.45), 0 4px 16px rgba(0, 0, 0, 0.25);
}

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

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    background: linear-gradient(135deg, #0e0e1c 0%, #1e0a0a 60%, #0e0e1c 100%);
    padding: 28px 16px 48px;
}

/* ── Flecha volver ───────────────────────────────── */
.back-arrow-container {
    position: fixed;
    top: 18px;
    left: 18px;
    z-index: 100;
}

.back-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: #fff;
    font-size: 1.2rem;
    text-decoration: none;
    transition: background 0.2s, transform 0.15s;
    border: 1px solid rgba(255,255,255,0.15);
}

.back-arrow:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: translateX(-2px);
}

/* ── Tarjeta ─────────────────────────────────────── */
.register-container {
    background: var(--card-bg);
    border-radius: 22px;
    padding: 40px 36px 36px;
    width: 100%;
    max-width: 520px;
    margin-top: 14px;
    box-shadow: var(--shadow);
    animation: slideUp 0.45s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ── Encabezado ──────────────────────────────────── */
.auth-brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 28px;
}

.auth-logo {
    width: 54px;
    height: 54px;
    background: var(--red);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
    box-shadow: 0 6px 20px var(--red-glow);
}

.auth-logo svg { width: 28px; height: 28px; }

.auth-brand-name {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.3px;
}

.auth-brand-sub {
    font-size: 0.77rem;
    color: var(--muted);
    margin-top: 2px;
}

.title {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--dark);
    text-align: center;
    margin-bottom: 4px;
}

/* ── Selector Alumno / Delegado ──────────────────── */
.button-group {
    display: flex;
    gap: 8px;
    margin: 20px 0 22px;
    background: var(--bg-input);
    border-radius: 10px;
    padding: 4px;
}

.button-group button {
    flex: 1;
    padding: 10px 12px;
    font-size: 0.87rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    border: none;
    background: transparent;
    color: var(--muted);
    transition: all 0.2s;
    font-family: inherit;
}

.button-group button:hover {
    background: rgba(192, 57, 43, 0.08);
    color: var(--red);
}

.button-group button.active {
    background: var(--red);
    color: #fff;
    box-shadow: 0 3px 10px var(--red-glow);
}

/* ── Campos ──────────────────────────────────────── */
.input-group {
    margin-bottom: 15px;
    text-align: left;
}

.input-group label {
    display: block;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 6px;
}

.input-group input,
.input-group select {
    width: 100%;
    padding: 11px 14px;
    border: 1.5px solid var(--border);
    border-radius: 10px;
    font-size: 0.92rem;
    color: var(--text);
    background: var(--bg-input);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: inherit;
    text-align: left;
}

.input-group input:focus,
.input-group select:focus {
    border-color: var(--red);
    background: #fff;
    box-shadow: 0 0 0 3.5px var(--red-glow);
}

.input-group input[type="file"] {
    padding: 9px 12px;
    font-size: 0.82rem;
    background: var(--bg-input);
    cursor: pointer;
    color: var(--muted);
}

.input-group input[readonly] {
    background: #f0f0f0;
    color: var(--muted);
    cursor: default;
}

/* Toggle contraseña */
.toggle-password {
    cursor: pointer;
    margin-left: 8px;
    vertical-align: middle;
    opacity: 0.55;
    transition: opacity 0.2s;
    display: inline-flex;
    align-items: center;
}

.toggle-password:hover { opacity: 1; }

/* Preview foto */
#previewImagePhoto,
#previewImageDelegate {
    display: none;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    margin-top: 10px;
    border: 2.5px solid var(--red);
    box-shadow: 0 4px 12px var(--red-glow);
}

/* ── Botón submit ────────────────────────────────── */
.actions { margin-top: 22px; }

.register-button {
    width: 100%;
    padding: 13px;
    background: var(--red);
    color: #fff;
    border: none;
    border-radius: 10px;
    font-size: 0.97rem;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, transform 0.12s, box-shadow 0.2s;
    letter-spacing: 0.3px;
    font-family: inherit;
    box-shadow: 0 4px 14px var(--red-glow);
}

.register-button:hover {
    background: var(--red-dark);
    transform: translateY(-1px);
    box-shadow: 0 6px 18px rgba(192, 57, 43, 0.35);
}

.register-button:active { transform: translateY(0); }

/* Link de volver -->
.auth-footer-reg {
    text-align: center;
    margin-top: 20px;
    font-size: 0.83rem;
    color: var(--muted);
}

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

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

/* ── Loading ─────────────────────────────────────── */
#loadingOverlay {
    position: fixed;
    inset: 0;
    background: rgba(14, 14, 28, 0.72);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    color: #fff;
    gap: 14px;
    font-size: 0.95rem;
    backdrop-filter: blur(4px);
}

.spinner {
    width: 44px;
    height: 44px;
    border: 3.5px solid rgba(255, 255, 255, 0.15);
    border-top-color: var(--red);
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ──────────────────────────────────── */
@media (max-width: 560px) {
    .register-container { padding: 30px 20px 28px; border-radius: 18px; }
}