/* ============================================================
   PORTAFOLIO MULTIMEDIA — ESTILO EDITORIAL MODERNO AZUL
   Paleta: Azul oscuro #1341A2 · Azul medio #3E85C1
           Azul claro #39BBED · Negro #000000
   ============================================================ */

/* ---------- VARIABLES ---------- */
:root {
    --bg: #1b0b18;
    --bg-alt: #24101f;
    --bg-card: #2d1428;
    --bg-card-2: #36192f;

    --deep: #8d1559;
    --mid: #641c56;
    --light: #e69ac3;

    --accent-soft: rgba(230, 154, 195, 0.10);
    --accent-glow: rgba(230, 154, 195, 0.20);

    --text: #f7e8f1;
    --text-muted: #030000;

    --border: rgba(230, 154, 195, 0.18);
    --border-strong: rgba(141, 21, 89, 0.30);

    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 26px;

    --shadow: 0 8px 40px rgba(0, 0, 0, 0.60);
    --shadow-pink: 0 4px 32px rgba(230, 154, 195, 0.22);

    --transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);

    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'DM Sans', sans-serif;

    /* Layout */
    --col-left-w: 240px;
    --col-right-w: 230px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-weight: 300;
    line-height: 1.7;
    overflow-x: hidden;
    /* Subtle atmospheric gradient */
    background-image:
        radial-gradient(ellipse 80% 55% at 15% 0%, rgba(19, 65, 162, 0.20) 0%, transparent 60%),
        radial-gradient(ellipse 55% 35% at 85% 100%, rgba(57, 187, 237, 0.07) 0%, transparent 55%);
}

/* ---------- SCROLLBAR ---------- */
::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--deep), var(--light));
    border-radius: 4px;
}

/* ============================================================
   THREE-COLUMN LAYOUT
   ============================================================ */
.three-col-layout {
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    /* 🔥 equilibrio visual */
    grid-template-areas: "left center right";
    min-height: 100vh;
    max-width: 100%;
    margin: 0;
}

/* ============================================================
   SHARED COLUMN
   ============================================================ */
.col-left,
.col-right {
    padding: 3rem 0;
}

.col-sticky {
    position: sticky;
    top: 2.5rem;
}

.col-heading {
    margin-bottom: 2rem;
    padding-bottom: 0.9rem;
    border-bottom: 1px solid var(--border);
}

.col-label {
    font-family: var(--font-display);
    font-size: 1.05rem;
    /* 🔥 más visible */
    letter-spacing: 0.28em;
    text-transform: uppercase;
    color: var(--light);
    opacity: 0.85;
}

/* ============================================================
   COLUMNA IZQUIERDA — ÍNDICE
   ============================================================ */
.col-left {
    grid-area: left;
    padding-right: 1.8rem;
    padding-left: 1.8rem;
    border-right: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(19, 65, 162, 0.08) 0%, transparent 80%);
}

.index-list {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.index-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    font-size: 1.05rem;
    /* 🔥 más grande */
    padding: 0.85rem 1rem;
    /* ↑ larger for hierarchy */
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.72rem 0.9rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    position: relative;
    transition: background var(--transition), color var(--transition), transform var(--transition), border-color var(--transition);
}

.index-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: linear-gradient(180deg, var(--light), var(--deep));
    border-radius: 3px;
    transition: height var(--transition);
}

.index-item:hover {
    color: var(--light);
    background: var(--accent-soft);
    border-color: var(--border);
    transform: translateX(3px);
}

.index-item.active {
    color: var(--light);
    background: rgba(255, 255, 255, 0.18);
    border-color: var(--border-strong);
}

.index-item.active::before {
    height: 65%;
}

.index-num {
    font-family: var(--font-display);
    font-size: 0.95rem;
    /* ↑ slightly larger */
    letter-spacing: 0.10em;
    color: var(--light);
    opacity: 0.55;
    flex-shrink: 0;
    min-width: 2ch;
    font-weight: 600;

}

.index-item.active .index-num {
    opacity: 1;

}

/* ============================================================
   COLUMNA CENTRAL
   ============================================================ */
.col-center {
    grid-area: center;
    padding: 0 3rem;
    min-width: 0;
}

/* ============================================================
   COLUMNA DERECHA — FASES
   ============================================================ */
.col-right {
    grid-area: right;
    padding-left: 1.8rem;
    padding-right: 1.8rem;
    border-left: 1px solid var(--border);
    background: linear-gradient(180deg, rgba(57, 187, 237, 0.06) 0%, transparent 80%);
}

.phases-list {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.phase-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.05rem;
    padding: 0.8rem 1rem;
    /* ↑ larger for readability */
    font-weight: 400;
    letter-spacing: 0.025em;
    color: var(--text-muted);
    text-decoration: none;
    padding: 0.68rem 0.9rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition: background var(--transition),
        color var(--transition),
        transform var(--transition),
        border-color var(--transition);
}

.phase-item:hover {
    color: var(--light);
    background: var(--accent-soft);
    border-color: var(--border);
    transform: translateX(-3px);
}

.phase-item.active {
    color: var(--light);
    background: rgba(19, 65, 162, 0.18);
    border-color: var(--border-strong);
}

.phase-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: transparent;
    border: 1.5px solid var(--border-strong);
    flex-shrink: 0;
    transition: background var(--transition), box-shadow var(--transition);
}

.phase-item:hover .phase-dot,
.phase-item.active .phase-dot {
    background: var(--light);
    border-color: var(--light);
    box-shadow: 0 0 8px rgba(57, 187, 237, 0.55);
}

.video-wrapper {
    width: 100%;
    /* ← CORREGIDO */
    max-width: 900px;
    margin: 0 auto;
    aspect-ratio: 16 / 9;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: contain;
    /* ← CAMBIO CLAVE */
    border-radius: 16px;
    background: black;
    /* opcional, para que no se vean espacios raros */
}

/* ============================================================
   DOC SECTION
   ============================================================ */
.doc-section {
    padding: 4.5rem 0;
    border-bottom: 1px solid var(--border);
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.75s ease, transform 0.75s ease;

}


.doc-section:last-of-type {
    border-bottom: none;
}

.doc-section.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Section header */
.section-header {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 2.8rem;
}

.section-number {
    font-family: var(--font-display);
    font-size: 3.8rem;
    font-weight: 300;
    background: linear-gradient(135deg, var(--deep) 20%, var(--light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.7;
    line-height: 1;
    min-width: 3ch;
}

.section-title-wrap {
    position: relative;
}

/* Decorative accent line under title */
.section-title-wrap::after {
    content: '';
    display: block;
    width: 44px;
    height: 2px;
    background: linear-gradient(90deg, var(--deep), var(--light));
    border-radius: 2px;
    margin-top: 0.55rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    color: var(--text);
    margin-bottom: 0.35rem;
    line-height: 1.1;
    letter-spacing: -0.01em;
}

.section-desc {
    font-size: 0.9rem;
    color: var(--text-muted);
    max-width: 500px;
}

/* ---- DOC CARD ---- */
.doc-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow), var(--shadow-blue);
    transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.doc-card:hover {
    border-color: var(--border-strong);
    box-shadow:
        0 16px 64px rgba(0, 0, 0, 0.65),
        0 0 0 1px rgba(57, 187, 237, 0.12),
        var(--shadow-blue);
    transform: translateY(-3px);
}

.doc-card-label {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 1.6rem;
    font-size: 0.78rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: #d4a300;
    border-bottom: 1px solid var(--border);
    font-weight: 400;
}

.doc-icon {
    font-size: 1rem;
}

.pdf-wrapper {
margin-top: 8px;
border-radius: 12px;
overflow: hidden;
width: 100%;
display: flex;
justify-content: center;
align-items: center;
background: #111;
padding: 12px;
}

.pdf-wrapper img {
width: 100%;
max-width: 1000px;
height: auto;
object-fit: contain;
border-radius: 10px;
display: block;
}

/* Coming soon */
.coming-soon-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 4.5rem;
    background: var(--bg-card);
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-xl);
    color: var(--text-muted);
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.coming-soon-icon {
    font-size: 2.2rem;
    color: var(--light);
    opacity: 0.4;
    animation: pulse 2.5s ease-in-out infinite;
}

@keyframes pulse {

    0%,
    100% {
        opacity: 0.3;
        transform: scale(1);
    }

    50% {
        opacity: 0.75;
        transform: scale(1.1);
    }
}

/* ============================================================
   AUDIO / IDEA SECTION
   ============================================================ */
.audio-bg {
    position: relative;
    width: 100%;
    height: 420px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow), var(--shadow-blue);
}

.bg-image {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.audio-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg,
            #431238 0%,
            rgba(0, 5, 20, 0.72) 100%);
}

.audio-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: #fff;
    text-align: center;
    gap: 24px;
    padding: 24px;
}

.audio-title {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-weight: 300;
    letter-spacing: 0.05em;
}

audio {
    width: 300px;
    border-radius: 30px;
    accent-color: var(--light);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
    padding: 2.5rem 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.3);
    border-top: 1px solid var(--border);
    margin-top: 2rem;
}

.footer-brand {
    font-family: var(--font-display);
    font-size: 1.6rem;
    font-style: italic;
    font-weight: 700;
    background: linear-gradient(90deg, var(--mid), var(--light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.01em;
}

.footer-heart {
    color: var(--light);
}

/* ============================================================
   RESPONSIVE — max 1100px
   ============================================================ */
@media (max-width: 1100px) {
    :root {
        --col-left-w: 200px;
        --col-right-w: 190px;
    }

    .col-center {
        padding: 0 2rem;
    }
}

/* ============================================================
   RESPONSIVE — max 900px (tablet 2-col)
   ============================================================ */
@media (max-width: 900px) {
    .three-col-layout {
        grid-template-columns: 1fr 200px;
        grid-template-areas:
            "left left"
            "center right";
        max-width: 100%;
    }

    .col-left {
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 1.4rem 1.6rem;
    }

    .col-sticky {
        position: static;
    }

    .col-left .col-heading {
        display: inline-block;
        margin-bottom: 0.9rem;
    }

    .index-list {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.45rem;
    }

    .index-item {
        font-size: 0.82rem;
        padding: 0.4rem 0.9rem;
        border: 1px solid var(--border);
        border-radius: 50px;
        background: rgba(19, 65, 162, 0.07);
        transform: none !important;
    }

    .index-item::before {
        display: none;
    }

    .index-item.active {
        border-color: var(--border-strong);
        background: rgba(19, 65, 162, 0.20);
    }

    .col-center {
        padding: 0 1.6rem;
    }

    .col-right {
        border-left: 1px solid var(--border);
        padding-left: 1.2rem;
        padding-right: 1.2rem;
    }

    .col-right .col-sticky {
        position: sticky;
        top: 1rem;
    }

    .pdf-wrapper iframe {
        height: 500px;
    }

    .section-number {
        font-size: 2.6rem;
    }
}

/* ============================================================
   RESPONSIVE — max 640px (mobile 1-col)
   ============================================================ */
@media (max-width: 640px) {
    .three-col-layout {
        grid-template-columns: 1fr;
        grid-template-areas: "left" "center" "right";
    }

    .col-left {
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 1.2rem 1.4rem;
        grid-area: left;
    }

    .col-left .col-sticky {
        position: static;
    }

    .index-list {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.35rem;
    }

    .index-item {
        font-size: 0.78rem;
        padding: 0.35rem 0.75rem;
        border: 1px solid var(--border);
        border-radius: 50px;
        background: rgba(19, 65, 162, 0.07);
        gap: 0.35rem;
        transform: none !important;
    }

    .index-item::before {
        display: none;
    }

    .index-num {
        font-size: 0.68rem;
    }

    .col-center {
        padding: 0 1.2rem;
        grid-area: center;
    }

    .col-right {
        border-left: none;
        border-top: 1px solid var(--border);
        padding: 1.2rem 1.4rem;
        grid-area: right;
    }

    .col-right .col-sticky {
        position: static;
    }

    .phases-list {
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.35rem;
    }

    .phase-item {
        font-size: 0.78rem;
        padding: 0.35rem 0.8rem;
        border: 1px solid var(--border);
        border-radius: 50px;
        background: rgba(57, 187, 237, 0.05);
        transform: none !important;
    }

    .phase-dot {
        display: none;
    }

    .doc-section {
        padding: 3rem 0;
    }

    .section-header {
        gap: 1rem;
    }

    .section-number {
        font-size: 2.2rem;
    }

    .pdf-wrapper iframe {
        height: 400px;
    }

    .audio-bg {
        height: 340px;
    }

    .footer {
        flex-direction: column;
        text-align: center;
        gap: 0.4rem;
        padding: 1.5rem 0;
    }
}