/**
 * Bridge Showcase — Thelis Engineering Gap
 * Light warm background | Cinematic wow animations | v3
 */

@import url('https://fonts.googleapis.com/css2?family=Syne:wght@300;400;600;700;800&family=JetBrains+Mono:wght@400;500;700&display=swap');

/* =============================================
   CSS VARIABLES
   ============================================= */
:root {
    --bs-red:           #E8294A;
    --bs-red-dim:       rgba(232, 41, 74, 0.45);
    --bs-red-glow:      rgba(232, 41, 74, 0.32);

    /* Light surfaces */
    --bs-light:         #f7f5f1;
    --bs-light-2:       #eeeae4;

    /* Dark surfaces — nodes bar + cards stay dark for contrast */
    --bs-dark:          #09090d;
    --bs-dark-2:        #0f1018;
    --bs-dark-3:        #161720;

    /* Borders */
    --bs-border:        rgba(0, 0, 0, 0.07);

    /* Text on light background */
    --bs-text:          #111118;
    --bs-text-dim:      rgba(17, 17, 24, 0.48);

    /* Text on dark surfaces (cards, nodes bar) */
    --bs-text-inv:      #dde1ec;
    --bs-text-inv-dim:  rgba(221, 225, 236, 0.48);

    /* Easing curves */
    --bs-spring:        cubic-bezier(0.34, 1.56, 0.64, 1);
    --bs-ease-out:      cubic-bezier(0.22, 1, 0.36, 1);

    --bs-ff-display: 'Syne', sans-serif;
    --bs-ff-mono:    'JetBrains Mono', monospace;
}

/* =============================================
   SECTION — WARM LIGHT BACKGROUND
   ============================================= */
.bs-section {
    background: var(--bs-light);
    color: var(--bs-text);
    position: relative;
    overflow: hidden;
    width: 100vw;
    margin-left: calc(50% - 50vw);
    padding-bottom: 120px;
}

/* Engineering dot grid — fades in on scroll */
.bs-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(17, 17, 24, 0.055) 1.2px, transparent 1.2px);
    background-size: 32px 32px;
    pointer-events: none;
    z-index: 0;
    opacity: 0;
    transition: opacity 2.2s var(--bs-ease-out) 0.4s;
}

.bs-section.is-visible::before {
    opacity: 1;
}

/* Red accent bar — sweeps in from left on reveal */
.bs-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    height: 3px;
    width: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--bs-red) 20%,
        var(--bs-red) 80%,
        transparent 100%
    );
    z-index: 10;
    transition: left 1.4s var(--bs-ease-out) 0.15s;
}

.bs-section.is-visible::after {
    left: 0;
}

/* =============================================
   HEADER
   ============================================= */
.bs-header {
    text-align: center;
    padding: 100px 40px 64px;
    position: relative;
    z-index: 2;
}

.bs-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    font-family: var(--bs-ff-mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--bs-red);
    margin-bottom: 28px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.7s ease 0.2s, transform 0.8s var(--bs-ease-out) 0.2s;
}

.bs-section.is-visible .bs-eyebrow {
    opacity: 1;
    transform: translateY(0);
}

.bs-eyebrow-line {
    display: block;
    width: 36px;
    height: 1px;
    background: var(--bs-red);
    opacity: 0.6;
}

.bs-title {
    font-family: var(--bs-ff-display);
    font-size: clamp(38px, 5vw, 68px);
    font-weight: 700;
    letter-spacing: -2px;
    color: var(--bs-text);
    margin: 0 0 22px;
    line-height: 1.05;
    perspective: 900px;
    transform-style: preserve-3d;
}

/* Word spans injected by JS for staggered spring reveal */
.bs-word {
    display: inline-block;
    opacity: 0;
    transform: translateY(70px) rotateX(-28deg);
    transform-origin: bottom center;
    transition:
        opacity  0.65s ease            calc(var(--word-i, 0) * 80ms + 320ms),
        transform 0.95s var(--bs-spring) calc(var(--word-i, 0) * 80ms + 320ms);
}

.bs-section.is-visible .bs-word {
    opacity: 1;
    transform: translateY(0) rotateX(0deg);
}

/* Fallback when JS hasn't split words */
.bs-title:not(:has(.bs-word)) {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.9s ease 0.35s, transform 0.9s var(--bs-ease-out) 0.35s;
}

.bs-section.is-visible .bs-title:not(:has(.bs-word)) {
    opacity: 1;
    transform: translateY(0);
}

.bs-subtitle {
    font-family: var(--bs-ff-mono);
    font-size: 13px;
    color: var(--bs-text-dim);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.9;
    letter-spacing: 0.3px;
    opacity: 0;
    transform: translateY(18px);
    transition: opacity 0.8s ease 0.78s, transform 0.8s var(--bs-ease-out) 0.78s;
}

.bs-section.is-visible .bs-subtitle {
    opacity: 1;
    transform: translateY(0);
}

/* =============================================
   BRIDGE STAGE LAYOUT
   ============================================= */
.bs-stage {
    position: relative;
    display: flex;
    align-items: center;
    padding: 0 32px;
    max-width: 1600px;
    margin: 0 auto;
    z-index: 2;
}

/* ─── EDGE LABELS ─────────────────────────── */
.bs-edge {
    flex-shrink: 0;
    width: 130px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    opacity: 0;
    transition:
        opacity   0.7s ease             0.9s,
        transform 1s   var(--bs-spring) 0.9s;
}

.bs-edge--left  { transform: translateX(-60px); }
.bs-edge--right { transform: translateX(60px); flex-direction: column; }

.bs-section.is-visible .bs-edge {
    opacity: 1;
    transform: translateX(0) !important;
}

.bs-edge-label {
    font-family: var(--bs-ff-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--bs-text);
    line-height: 1.8;
    text-align: center;
}

.bs-edge-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--bs-red);
    box-shadow: 0 0 12px var(--bs-red-glow);
    opacity: 0.7;
}

.bs-edge-arrow {
    font-size: 40px;
    color: var(--bs-red);
    opacity: 0.35;
    line-height: 1;
}

/* ─── BRIDGE IMAGE CONTAINER ──────────────── */
.bs-bridge-wrap {
    flex: 1;
    min-width: 0;
}

.bs-image-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%;
    background: var(--bs-dark);
    overflow: hidden;
    border-radius: 4px;

    /* Entrance: lifts up and sharpens */
    opacity: 0;
    transform: translateY(40px) scale(0.96);
    filter: blur(6px);
    transition:
        opacity   1.3s var(--bs-ease-out) 0.55s,
        transform 1.5s var(--bs-ease-out) 0.55s,
        filter    1.1s ease               0.55s,
        box-shadow 0.4s ease;

    box-shadow:
        0 20px 70px rgba(0, 0, 0, 0.18),
        0 4px  16px rgba(0, 0, 0, 0.1),
        0 0 0 1px rgba(0, 0, 0, 0.05);
}

.bs-section.is-visible .bs-image-container {
    opacity: 1;
    transform: translateY(0) scale(1);
    filter: blur(0);
}

.bs-image-container:hover {
    box-shadow:
        0 32px 100px rgba(0, 0, 0, 0.24),
        0 8px  32px  rgba(0, 0, 0, 0.14),
        0 0 0 1px rgba(232, 41, 74, 0.08);
}

.bs-bridge-img {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: contain;
    object-position: center;
    display: block;
    opacity: 0;
    transform: scale(0.97);
    transition:
        opacity   1.4s var(--bs-ease-out) 0.7s,
        transform 1.6s var(--bs-ease-out) 0.7s;
}

.bs-section.is-visible .bs-bridge-img {
    opacity: 1;
    transform: scale(1);
}

/* Scan-line reveal — more intense */
.bs-scanline {
    position: absolute;
    top: 0; left: -130px;
    width: 130px; height: 100%;
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(232, 41, 74, 0.22) 50%,
        transparent 100%
    );
    z-index: 5;
    pointer-events: none;
}

.bs-section.is-visible .bs-scanline {
    animation: bsScanReveal 2.2s cubic-bezier(0.25, 0, 0.25, 1) 0.65s forwards;
}

@keyframes bsScanReveal {
    0%   { left: -130px; opacity: 0; }
    8%   { opacity: 1; }
    88%  { opacity: 1; }
    100% { left: 110%;  opacity: 0; }
}

/* =============================================
   NODES BAR — stays dark: beautiful contrast strip
   ============================================= */
.bs-nodes-bar {
    position: relative;
    width: 100%;
    height: 112px;
    background: var(--bs-dark-2);
    border-top: 1px solid rgba(232, 41, 74, 0.22);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.14);
}

/* =============================================
   PILLAR NODES
   ============================================= */
.bs-node {
    position: absolute;
    top: 50%;
    transform: translateX(-50%) translateY(calc(-50% + 18px));
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 20;
    opacity: 0;
    transition:
        opacity  0.6s ease,
        transform 0.8s var(--bs-spring);
}

.bs-section.is-visible .bs-node--software  { opacity: 1; transform: translateX(-50%) translateY(-50%); transition-delay: 0.72s; }
.bs-section.is-visible .bs-node--ai        { opacity: 1; transform: translateX(-50%) translateY(-50%); transition-delay: 0.88s; }
.bs-section.is-visible .bs-node--embedded  { opacity: 1; transform: translateX(-50%) translateY(-50%); transition-delay: 1.04s; }
.bs-section.is-visible .bs-node--hardware  { opacity: 1; transform: translateX(-50%) translateY(-50%); transition-delay: 1.20s; }

.bs-node--software { left: 23%; }
.bs-node--ai       { left: 40%; }
.bs-node--embedded { left: 57%; }
.bs-node--hardware { left: 74%; }

/* ─── NODE CORE ─────────────────────────────── */
.bs-node-core {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(9, 9, 13, 0.9);
    border: 1.5px solid rgba(232, 41, 74, 0.38);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(232, 41, 74, 0.78);
    position: relative;
    z-index: 2;
    transition: all 0.32s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow:
        0 0 18px rgba(232, 41, 74, 0.1),
        inset 0 0 14px rgba(232, 41, 74, 0.05);
    backdrop-filter: blur(4px);

    /* Idle float — each node offset differently */
    animation: bsCoreFloat 4.2s ease-in-out infinite;
}

.bs-node--ai       .bs-node-core { animation-duration: 3.7s; animation-delay: -1.1s; }
.bs-node--embedded .bs-node-core { animation-duration: 4.6s; animation-delay: -2.4s; }
.bs-node--hardware .bs-node-core { animation-duration: 3.4s; animation-delay: -0.6s; }

@keyframes bsCoreFloat {
    0%, 100% { transform: translateY(0px); }
    50%       { transform: translateY(-8px); }
}

/* Stop float on hover / active */
.bs-node:hover     .bs-node-core,
.bs-node.is-active .bs-node-core {
    animation: none;
}

/* ─── PULSE RINGS ──────────────────────────── */
.bs-node-ring {
    position: absolute;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: 1px solid rgba(232, 41, 74, 0.28);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 1;
    animation: bsRingPulse 3.5s ease-out infinite;
}

.bs-node-ring--2 {
    animation-delay: 1.2s;
}

@keyframes bsRingPulse {
    0%   { width: 50px;  height: 50px;  opacity: 0.5; }
    100% { width: 110px; height: 110px; opacity: 0; }
}

/* ─── NODE LABEL ───────────────────────────── */
.bs-node-label {
    font-family: var(--bs-ff-mono);
    font-size: 9px;
    font-weight: 700;
    letter-spacing: 2.5px;
    color: #fff;
    background: transparent;
    border: none;
    padding: 4px 0;
    white-space: nowrap;
    transition: all 0.3s ease;
    position: relative;
    z-index: 2;
}

/* ─── HOVER STATE ──────────────────────────── */
.bs-node:hover .bs-node-core {
    border-color: var(--bs-red);
    color: #fff;
    background: rgba(232, 41, 74, 0.88);
    box-shadow:
        0 0 28px rgba(232, 41, 74, 0.55),
        0 0 64px rgba(232, 41, 74, 0.28),
        0 0 120px rgba(232, 41, 74, 0.12),
        inset 0 0 14px rgba(255, 255, 255, 0.12);
    transform: scale(1.12) translateY(-3px);
}

.bs-node:hover .bs-node-label {
    color: #fff;
    letter-spacing: 3px;
}

.bs-node:hover .bs-node-ring {
    border-color: rgba(232, 41, 74, 0.42);
}

/* ─── ACTIVE STATE ─────────────────────────── */
.bs-node.is-active .bs-node-core {
    border-color: var(--bs-red);
    color: #fff;
    background: var(--bs-red);
    box-shadow:
        0 0 40px rgba(232, 41, 74, 0.65),
        0 0 90px rgba(232, 41, 74, 0.38),
        0 0 160px rgba(232, 41, 74, 0.18),
        inset 0 0 20px rgba(255, 255, 255, 0.16);
    transform: scale(1.18) translateY(-5px);
}

.bs-node.is-active .bs-node-label {
    color: var(--bs-red);
    letter-spacing: 3.5px;
}

.bs-node.is-active .bs-node-ring {
    animation-duration: 1.8s;
    border-color: rgba(232, 41, 74, 0.48);
}

/* ─── INACTIVE DIMMING ─────────────────────── */
.bs-section.has-active .bs-node:not(.is-active) {
    opacity: 0.32;
}

/* =============================================
   CONNECTOR BEAM — lightning draw
   ============================================= */
.bs-beam {
    position: absolute;
    top: 58%;
    width: 2px;
    height: 0;
    transform: translateX(-50%);
    background: linear-gradient(to bottom, var(--bs-red), rgba(232, 41, 74, 0));
    box-shadow: 0 0 14px var(--bs-red-glow);
    z-index: 15;
    pointer-events: none;
    opacity: 0;
    transition: left 0.22s ease; /* only left slides */
}

.bs-beam.is-active {
    animation: bsBeamDraw 0.6s var(--bs-ease-out) forwards;
}

@keyframes bsBeamDraw {
    0%   { height: 0;   opacity: 0;   filter: brightness(5) blur(3px); }
    12%  {              opacity: 1;   filter: brightness(3) blur(1px); }
    50%  { height: 28%; opacity: 1;   filter: brightness(1.6); }
    100% { height: 42%; opacity: 1;   filter: brightness(1); }
}

/* =============================================
   CARDS AREA
   ============================================= */
.bs-cards-area {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
    position: relative;
    z-index: 2;
    min-height: 100px;
}

/* ─── IDLE PROMPT ──────────────────────────── */
.bs-prompt {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: 48px 20px;
    font-family: var(--bs-ff-mono);
    font-size: 12px;
    color: var(--bs-text-dim);
    letter-spacing: 1.5px;
    transition: opacity 0.35s ease, transform 0.35s ease;
}

.bs-prompt.is-hidden {
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    display: none;
}

.bs-prompt-arrow {
    display: inline-block;
    color: var(--bs-red);
    opacity: 0.6;
    animation: bsPromptBounce 1.8s ease-in-out infinite;
    font-size: 18px;
}

@keyframes bsPromptBounce {
    0%, 100% { transform: translateY(0); }
    50%       { transform: translateY(-7px); }
}

/* ─── CARDS — 3D perspective reveal ────────── */
.bs-card {
    display: none;
    grid-template-columns: 80px 1fr;
    background: var(--bs-dark-2);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-top: 2px solid var(--bs-red);
    border-radius: 2px 2px 12px 12px;
    overflow: hidden;
    margin-top: 0;

    /* Start state for 3D reveal */
    opacity: 0;
    transform: perspective(1100px) rotateX(-10deg) translateY(32px);
    transition:
        opacity   0.6s var(--bs-ease-out),
        transform 0.85s var(--bs-spring);

    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.2),
        0 4px  16px rgba(0, 0, 0, 0.1);
}

.bs-card.is-active {
    display: grid;
}

.bs-card.is-visible {
    opacity: 1;
    transform: perspective(1100px) rotateX(0deg) translateY(0);
    box-shadow:
        0 32px 90px rgba(0, 0, 0, 0.22),
        0 8px  24px rgba(0, 0, 0, 0.12),
        0 0 0 1px rgba(232, 41, 74, 0.07);
}

/* ─── CARD SIDEBAR ─────────────────────────── */
.bs-card-sidebar {
    background: var(--bs-red);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--bs-ff-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 4px;
    color: rgba(255, 255, 255, 1) !important;
    writing-mode: vertical-lr;
    text-orientation: mixed;
    transform: rotate(180deg);
    padding: 28px 0;
}

/* ─── CARD BODY ────────────────────────────── */
.bs-card-body {
    padding: 40px 48px;
}

.bs-card-top {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.bs-card-tag {
    display: inline-block;
    font-family: var(--bs-ff-mono);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--bs-red) !important;
    border: 1px solid rgba(232, 41, 74, 0.35);
    padding: 5px 14px;
    border-radius: 2px;
    margin-bottom: 14px;
}

.bs-card-top h3 {
    font-family: var(--bs-ff-display);
    font-size: clamp(24px, 2.5vw, 34px);
    font-weight: 600;
    color: #fff !important;
    margin: 0;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

/* ─── CARD BLOCKS GRID ─────────────────────── */
.bs-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 36px;
}

.bs-block h4 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--bs-ff-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.7);
    margin: 0 0 14px;
}

.bs-badge {
    font-family: var(--bs-ff-mono);
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 2px;
    padding: 4px 10px;
    border-radius: 2px;
}

.bs-badge--why  { background: rgba(255, 200, 0, 0.12);  color: #ffc800; border: 1px solid rgba(255, 200, 0, 0.25); }
.bs-badge--how  { background: rgba(0, 200, 150, 0.12);  color: #00c896; border: 1px solid rgba(0, 200, 150, 0.25); }
.bs-badge--what { background: rgba(232, 41, 74, 0.12);  color: var(--bs-red); border: 1px solid rgba(232, 41, 74, 0.25); }

.bs-block p {
    font-size: 14px;
    color: var(--bs-text-inv-dim);
    line-height: 1.8;
    margin: 0;
}

.bs-results {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.bs-results li {
    font-size: 14px;
    color: var(--bs-text-inv-dim);
    padding-left: 20px;
    position: relative;
    line-height: 1.7;
}

.bs-results li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--bs-red);
    font-size: 11px;
    line-height: 1.8;
}

.bs-results strong {
    color: #fff;
    font-weight: 600;
}

/* Card footer — lien vers le projet */
.bs-card-footer {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.bs-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--bs-ff-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--bs-red) !important;
    text-decoration: none !important;
    transition: gap 0.3s var(--bs-ease-out), opacity 0.2s ease;
    opacity: 0.85;
}

.bs-card-link:hover {
    gap: 12px;
    opacity: 1;
    color: var(--bs-red) !important;
}

/* =============================================
   QUOTE
   ============================================= */
.bs-quote-wrap {
    text-align: center;
    padding: 80px 40px 0;
    position: relative;
    z-index: 2;
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.9s ease 1.4s, transform 0.9s var(--bs-ease-out) 1.4s;
}

.bs-section.is-visible .bs-quote-wrap {
    opacity: 1;
    transform: translateY(0);
}

.bs-quote-line {
    width: 1px;
    height: 64px;
    background: linear-gradient(to bottom, transparent, rgba(232, 41, 74, 0.4));
    margin: 0 auto 48px;
}

.bs-quote {
    font-family: var(--bs-ff-display);
    font-size: clamp(20px, 2.8vw, 36px);
    font-weight: 300;
    font-style: italic;
    color: var(--bs-text-dim);
    line-height: 1.55;
    max-width: 860px;
    margin: 0 auto;
    border: none;
    padding: 0;
}

.bs-quote-mark {
    color: var(--bs-red);
    font-style: normal;
    font-size: 1.3em;
    line-height: 0;
    vertical-align: -0.25em;
    opacity: 0.7;
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1200px) {
    .bs-edge { width: 90px; }
    .bs-edge-label { font-size: 8px; }
}

@media (max-width: 900px) {
    .bs-stage { padding: 0 16px; }
    .bs-edge  { display: none; }

    .bs-card.is-active { grid-template-columns: 1fr; }
    .bs-card-sidebar {
        writing-mode: horizontal-tb;
        transform: none;
        padding: 14px 24px;
    }
    .bs-card-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    .bs-node-core { width: 40px; height: 40px; }
    .bs-node-ring { width: 40px; height: 40px; }
    @keyframes bsRingPulse {
        0%   { width: 40px;  height: 40px;  opacity: 0.5; }
        100% { width: 90px;  height: 90px;  opacity: 0; }
    }
}

@media (max-width: 600px) {
    .bs-header { padding: 60px 20px 40px; }
    .bs-stage  { padding: 0; }
    .bs-cards-area { padding: 0 16px; }
    .bs-card-body  { padding: 24px; }
    .bs-card-top h3 { font-size: 20px; }

    .bs-node-core  { width: 32px; height: 32px; }
    .bs-node-core svg { width: 15px; height: 15px; }
    .bs-node-label { font-size: 7.5px; padding: 4px 8px; letter-spacing: 1.5px; }
}