/* ═══════════════════════════════════════════════════════════════
   AULA VIRTUAL — av-login.css
   Copia exacta de login.css del admin, adaptada para AV.
   Solo cambia el título y el link de WhatsApp en el .aspx.
═══════════════════════════════════════════════════════════════ */

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

:root {
    --brand:        #FFAD0A;
    --brand-dark:   #E09800;
    --brand-glow:   rgba(255,173,10,.32);
    --card-bg:      #ffffff;
    --card-radius:  24px;
    --card-shadow:  0 32px 72px rgba(0,0,0,.24), 0 8px 20px rgba(0,0,0,.14);
    --input-bg:     #F4F5F7;
    --input-border: #E2E4EA;
    --input-h:      48px;
    --input-radius: 12px;
    --text:         #1A1D2E;
    --text-2:       #5A5F7D;
    --text-muted:   #9699B0;
    --ease:         180ms cubic-bezier(.4,0,.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { height: 100%; }

body {
    min-height: 100vh;
    background-size: cover !important;
    background-position: center center !important;
    background-repeat: no-repeat !important;
    background-attachment: fixed !important;
    background-color: #1a1a1a !important;
    font-family: 'DM Sans', system-ui, sans-serif;
    font-size: 14px;
    -webkit-font-smoothing: antialiased;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 24px !important;
    overflow: hidden !important;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: linear-gradient(140deg, rgba(0,0,0,.48) 0%, rgba(0,0,0,.22) 50%, rgba(0,0,0,.42) 100%);
    z-index: 0;
    pointer-events: none;
}

.lk-blob { position: fixed; border-radius: 50%; filter: blur(90px); opacity: .15; pointer-events: none; z-index: 0; }
.lk-blob.b1 { width: 600px; height: 600px; top: -200px; left: -150px; background: radial-gradient(circle, #FFAD0A, transparent 70%); }
.lk-blob.b2 { width: 500px; height: 500px; bottom: -180px; right: -100px; background: radial-gradient(circle, #FFAD0A, transparent 70%); }
.lk-blob.b3 { width: 300px; height: 300px; top: 40%; left: 38%; background: radial-gradient(circle, rgba(255,173,10,.6), transparent 70%); opacity: .08; }

.lk-wrap {
    position: relative; z-index: 1;
    width: 100%; max-width: 400px;
    animation: lkIn 420ms cubic-bezier(.34,1.46,.64,1) both;
}

@keyframes lkIn {
    from { opacity: 0; transform: translateY(22px) scale(.97); }
    to   { opacity: 1; transform: translateY(0) scale(1); }
}

.lk-card {
    background: var(--card-bg) !important;
    border-radius: var(--card-radius) !important;
    box-shadow: var(--card-shadow) !important;
    padding: 38px 32px 28px !important;
    position: relative;
    overflow: hidden;
}

.lk-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent 0%, var(--brand) 30%, var(--brand-dark) 50%, var(--brand) 70%, transparent 100%);
    background-size: 200% 100%;
    animation: shimmer 2.8s linear infinite;
}

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

.lk-top { text-align: center; margin-bottom: 26px; }
.lk-logo-mini { display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.lk-logo-mini img { max-width: 170px; max-height: 80px; object-fit: contain; }

.lk-title {
    font-family: 'Sora', sans-serif;
    font-size: 21px; font-weight: 800;
    color: var(--text); letter-spacing: -.3px; margin-bottom: 5px;
}
.lk-sub { font-size: 13px; color: var(--text-muted); font-weight: 400; line-height: 1.5; }

.lk-field { margin-bottom: 14px; }
.lk-label { display: block; font-size: 12.5px; font-weight: 600; color: var(--text-2); margin-bottom: 5px; letter-spacing: .15px; }
.lk-label strong { font-weight: 600; }

.lk-ico { position: relative; display: flex; align-items: center; }
.lk-ico > i:first-child {
    position: absolute; left: 13px;
    font-size: 13px; color: var(--text-muted);
    pointer-events: none; transition: color var(--ease); z-index: 1;
}
.lk-ico:focus-within > i:first-child { color: var(--brand-dark); }

.lk-input {
    width: 100%; height: var(--input-h);
    padding: 0 42px 0 38px;
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: var(--input-radius);
    color: var(--text);
    font-family: 'DM Sans', system-ui, sans-serif;
    font-size: 14px; font-weight: 500;
    text-align: center;
    outline: none; -webkit-appearance: none; appearance: none;
    transition: border-color var(--ease), background var(--ease), box-shadow var(--ease);
}
.lk-input::placeholder { color: var(--text-muted); font-weight: 400; }
.lk-input:focus { border-color: var(--brand); background: #fff; box-shadow: 0 0 0 3px rgba(255,173,10,.15); }

.toggle-pass {
    position: absolute; right: 11px;
    background: none; border: none; cursor: pointer;
    padding: 5px; color: var(--text-muted); font-size: 13px;
    display: flex; align-items: center; z-index: 1;
    transition: color var(--ease);
}
.toggle-pass:hover { color: var(--brand-dark); }

/* ── BOTÓN ── */
.lk-btn,
.dxbButton_MaterialCompact.lk-btn {
    position: relative !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    min-height: 50px !important;
    margin-top: 4px !important;
    border-radius: 14px !important;
    border: none !important;
    padding: 0 !important;
    cursor: pointer !important;
    overflow: hidden !important;
    isolation: isolate !important;
    background: linear-gradient(135deg, #FFAD0A 0%, #E09800 100%) !important;
    color: #fff !important;
    box-shadow: 0 8px 22px var(--brand-glow), inset 0 1px 0 rgba(255,255,255,.28), inset 0 -1px 0 rgba(0,0,0,.10) !important;
    transition: transform 150ms cubic-bezier(.34,1.56,.64,1), box-shadow 150ms ease, filter 150ms ease !important;
}
.lk-btn::before {
    content: "" !important; position: absolute !important;
    inset: -40% -35% auto -35% !important; height: 95% !important;
    background: radial-gradient(700px 220px at 35% 35%, rgba(255,255,255,.22), rgba(255,255,255,.10) 45%, transparent 72%) !important;
    transform: rotate(-10deg) !important; pointer-events: none !important; z-index: 0 !important;
}
.lk-btn::after {
    content: "" !important; position: absolute !important; inset: 0 !important;
    border-radius: 14px !important; padding: 1px !important;
    background: linear-gradient(135deg, rgba(255,255,255,.50), rgba(255,255,255,.12), rgba(0,0,0,.06)) !important;
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0) !important;
    -webkit-mask-composite: xor !important; mask-composite: exclude !important;
    pointer-events: none !important; z-index: 0 !important;
}
.lk-btn .dxb,
.lk-btn .dx-vam {
    position: relative !important; z-index: 1 !important;
    font-family: 'Sora', sans-serif !important;
    font-size: 13.5px !important; font-weight: 800 !important;
    letter-spacing: .5px !important; text-transform: uppercase !important;
    color: #fff !important;
}
.lk-btn .dxb-hbc { position: absolute !important; width: 0 !important; height: 0 !important; overflow: hidden !important; opacity: 0 !important; }
.lk-btn:hover, .dxbButtonHover_MaterialCompact.lk-btn {
    transform: translateY(-2px) !important; filter: brightness(1.04) !important;
    box-shadow: 0 14px 34px var(--brand-glow), inset 0 1px 0 rgba(255,255,255,.32), inset 0 -1px 0 rgba(0,0,0,.12) !important;
}
.dxbButtonPressed_MaterialCompact.lk-btn, .lk-btn:active {
    transform: translateY(0) scale(.98) !important; filter: brightness(.97) !important;
    box-shadow: 0 4px 12px var(--brand-glow), inset 0 1px 0 rgba(255,255,255,.20) !important;
}

/* ── ALERTA ERROR ── */
.lk-alert {
    margin-top: 14px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 12px;
    background: #FEF2F2;
    border: 1px solid #FECACA;
    color: #991B1B;
    font-size: 13px;
    line-height: 1.45;
    animation: lkIn 300ms ease both;
}
.lk-alert i { font-size: 15px; flex-shrink: 0; margin-top: 1px; color: #EF4444; }
.lk-alert strong { font-weight: 700; }

/* ── AYUDA ── */
.lk-help {
    margin-top: 16px;
    display: flex; align-items: center; justify-content: center;
    flex-wrap: wrap; gap: 8px;
    font-size: 13px; color: var(--text-muted); text-align: center;
}
.lk-wa {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 7px 14px; border-radius: 999px;
    border: 1px solid var(--input-border);
    background: #fff; box-shadow: 0 2px 8px rgba(0,0,0,.07);
    font-size: 13px; font-weight: 600; color: var(--text-2);
    text-decoration: none;
    transition: transform var(--ease), box-shadow var(--ease), color var(--ease);
}
.lk-wa:hover { transform: translateY(-1px); box-shadow: 0 6px 16px rgba(0,0,0,.11); color: var(--text); }
.lk-wa i { font-size: 15px; color: #25D366; }

.lk-footer { margin-top: 14px; text-align: center; font-size: 11.5px; color: var(--text-muted); }

@media (max-width: 480px) {
    body { padding: 16px !important; }
    .lk-card { padding: 28px 20px 22px !important; border-radius: 20px !important; }
    .lk-title { font-size: 19px; }
    .lk-logo-mini img { max-width: 140px; }
}