/* ==========================================================================
   La Llave de Lazurhi — Cortina de apertura (intro)
   Secuencia: línea de oro -> sigilo que florece -> título letra a letra ->
              subtítulo -> los paneles de vitral se abren y revelan el sitio.
   ========================================================================== */

.intro { display: none; }

html.intro-lock { overflow: hidden; }
html.intro-lock .intro { display: block; }
html.intro-lock .site-wrapper { opacity: 0; }

.site-wrapper {
    opacity: 1;
    transition: opacity 1s ease 0.15s;
}

.intro {
    position: fixed;
    inset: 0;
    z-index: 9999;
}

/* ---- Paneles de vitral que se abren al final ---- */
.intro__veil {
    position: absolute;
    inset: 0;
    display: flex;
}

.intro__veil span {
    flex: 1;
    background: linear-gradient(180deg, #07090d 0%, #0e1117 55%, #0a0d13 100%);
    will-change: transform;
}

.intro__veil span:nth-child(odd)  { transform-origin: top; }
.intro__veil span:nth-child(even) { transform-origin: bottom; }

/* Halo que respira detrás del sigilo */
.intro__halo {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 60vmin;
    height: 60vmin;
    transform: translate(-50%, -50%) scale(0.2);
    border-radius: 50%;
    background: radial-gradient(circle,
        rgba(201, 162, 75, 0.20) 0%,
        rgba(70, 179, 166, 0.10) 42%,
        transparent 70%);
    opacity: 0;
    filter: blur(6px);
}

/* ---- Escenario central ---- */
.intro__stage {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 2rem;
    text-align: center;
}

.intro__rule {
    display: none;
}

.intro__sigil {
    display: none;
}

/* Logo de la llave - animación de entrada */
.intro__logo {
    display: block;
    width: clamp(50px, 8vw, 80px);
    height: auto;
    margin: 0 auto 1.4rem;
    opacity: 0;
    transform: scale(0) rotate(-180deg);
    filter: drop-shadow(0 0 0 transparent);
}

.intro__title {
    font-family: var(--font-display);
    font-weight: 900;
    font-size: clamp(1.7rem, 5.6vw, 3.4rem);
    line-height: 1.16;
    color: var(--color-gold-light);
    letter-spacing: 0.02em;
    max-width: 18ch;
}

.intro__sub {
    font-family: var(--font-nav);
    font-size: clamp(0.68rem, 1.6vw, 0.86rem);
    text-transform: uppercase;
    color: var(--color-teal);
    letter-spacing: 0.1em;
    opacity: 0;
    margin-top: 0.8rem;
}

/* Letras del título de la intro */
.intro__title .ltr {
    display: inline-block;
    opacity: 0;
    transform: translateY(0.7em) scale(0.9);
    filter: blur(8px);
}

.ltr--break {
    display: block;
    height: 0;
    width: 100%;
}

.intro__skip {
    position: absolute;
    z-index: 3;
    bottom: 2.2rem;
    left: 50%;
    transform: translateX(-50%);
    background: transparent;
    border: 1px solid rgba(201, 162, 75, 0.28);
    color: var(--color-text-muted);
    font-family: var(--font-nav);
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    padding: 0.55rem 1.4rem;
    border-radius: 99px;
    cursor: pointer;
    opacity: 0;
    transition: color 0.3s, border-color 0.3s, opacity 0.6s ease;
}
.intro__skip:hover {
    color: var(--color-gold-light);
    border-color: var(--color-gold);
}

/* ---------- Fase 1: entrada ---------- */
.intro--in .intro__logo {
    animation: introLogo 1.6s cubic-bezier(0.22, 1, 0.36, 1) 0.3s forwards;
}
.intro--in .intro__halo {
    animation: introHalo 2.4s cubic-bezier(0.22, 1, 0.36, 1) 0.45s forwards;
}
.intro--in .intro__title .ltr {
    animation: introLetter 0.85s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    animation-delay: calc(1.6s + var(--i, 0) * 0.052s);
}
.intro--in .intro__sub {
    animation: introSub 1.1s cubic-bezier(0.22, 1, 0.36, 1) 2.6s forwards;
}
.intro--in .intro__skip {
    animation: introSkip 0.8s ease 2.2s forwards;
}

/* ---------- Fase 2: salida (se abre el vitral) ---------- */
.intro--exit .intro__stage,
.intro--exit .intro__skip {
    animation: introFadeOut 0.55s ease forwards;
}
.intro--exit .intro__halo {
    animation: introHaloOut 0.7s ease forwards;
}
.intro--exit .intro__veil span {
    animation: introPanel 1s cubic-bezier(0.76, 0, 0.24, 1) forwards;
    animation-delay: calc(var(--p, 0) * 0.055s);
}
.intro--exit .intro__veil span:nth-child(even) {
    animation-name: introPanelDown;
}

/* ---------- Keyframes ---------- */
@keyframes introLogo {
    0%   { opacity: 0; transform: scale(0) rotate(-180deg); filter: drop-shadow(0 0 0 transparent); }
    30%  { opacity: 1; transform: scale(1.4) rotate(15deg); filter: drop-shadow(0 0 40px rgba(196, 154, 75, 0.9)); }
    50%  { transform: scale(0.85) rotate(-5deg); filter: drop-shadow(0 0 25px rgba(196, 154, 75, 0.7)); }
    70%  { transform: scale(1.15) rotate(3deg); filter: drop-shadow(0 0 35px rgba(196, 154, 75, 0.8)); }
    85%  { transform: scale(0.95) rotate(-1deg); filter: drop-shadow(0 0 20px rgba(196, 154, 75, 0.5)); }
    100% { opacity: 1; transform: scale(1) rotate(0deg); filter: drop-shadow(0 0 18px rgba(196, 154, 75, 0.4)); }
}

@keyframes introHalo {
    0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.2); }
    55%  { opacity: 1; transform: translate(-50%, -50%) scale(1); }
    100% { opacity: 0.75; transform: translate(-50%, -50%) scale(1.25); }
}

@keyframes introHaloOut {
    to { opacity: 0; transform: translate(-50%, -50%) scale(2.4); }
}

@keyframes introSigil {
    0%   { opacity: 0; transform: scale(0.3) rotate(-45deg); }
    60%  { opacity: 1; transform: scale(1.15) rotate(0deg); }
    100% { opacity: 1; transform: scale(1) rotate(0deg); }
}

@keyframes introLetter {
    from { opacity: 0; transform: translateY(0.7em) scale(0.9); filter: blur(8px); }
    to   { opacity: 1; transform: translateY(0) scale(1); filter: blur(0); }
}

@keyframes introSub {
    from { opacity: 0; letter-spacing: 0.02em; }
    to   { opacity: 1; letter-spacing: 0.28em; }
}

@keyframes introSkip {
    to { opacity: 1; }
}

@keyframes introFadeOut {
    to { opacity: 0; transform: translateY(-14px); }
}

@keyframes introPanel {
    to { transform: translateY(-101%); }
}

@keyframes introPanelDown {
    to { transform: translateY(101%); }
}

@media (prefers-reduced-motion: reduce) {
    .intro { display: none !important; }
    html.intro-lock { overflow: auto; }
    html.intro-lock .site-wrapper { opacity: 1; }
}