/* ============================================================
   AChEntic — shared site stylesheet
   Design system: the marketing site wears the platform's own
   skin. All core tokens mirror achentic_platform/static/app.css
   (navy #06102b · blue #0066cc · accent #cce0ff) with a derived
   dark-surface scale for panels and bands.
   ============================================================ */

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

:root {
    /* exact platform palette */
    --navy:       #06102b;
    --blue:       #0066cc;
    --blue-hover: #0055aa;
    --accent:     #cce0ff;
    --muted-navy: #88a0c8;
    --tint:       #eef4fc;
    --success:    #2d8a4e;
    --error:      #cc3333;
    --warning:    #f0ad4e;
    /* technique accents (Raman · NIR · MIR · UV-Vis) */
    --raman: #8a2be2;
    --nir:   #b45309;
    --mir:   #b91c1c;
    --uvvis: #0066cc;
    /* derived dark-surface scale */
    --navy-2:    #0a1a3c;
    --navy-3:    #101f47;
    --navy-deep: #040b1e;
    --line-dark: rgba(136, 160, 200, 0.22);
    --line-soft: rgba(136, 160, 200, 0.12);
    --text:      #dfe9fa;
    /* typography (matches the app: system sans + mono tags) */
    --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;
}

html { scroll-behavior: smooth; overflow-x: clip; }

body {
    font-family: var(--sans);
    line-height: 1.65;
    color: var(--text);
    background:
        radial-gradient(1100px 700px at 80% -10%,
                        rgba(0, 102, 204, 0.14), transparent 60%),
        var(--navy);
    overflow-x: hidden;
}

::selection { background: rgba(0, 102, 204, 0.45); color: #fff; }

a { color: var(--accent); }

:focus-visible {
    outline: 2px solid var(--blue);
    outline-offset: 2px;
    border-radius: 4px;
}

/* === MONO PROTOCOL TAGS (the app's role-tag language) === */
.eyebrow {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--muted-navy);
    margin-bottom: 0.9rem;
}

.eyebrow::before {
    content: '';
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--blue);
    margin-right: 0.6rem;
    vertical-align: 1px;
}

/* === SPECTRUM SIGNATURE ===
   A miniature spectral trace, stroked across the four technique
   colors — the page's recurring mark. */
.spectrum-rule {
    height: 36px;
    background-image: url("data:image/svg+xml;base64,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");
    background-size: 100% 100%;
    background-repeat: no-repeat;
    max-width: 1200px;
    margin: 0 auto;
    opacity: 0.9;
}

/* === NAVIGATION === */
nav#navbar, nav.site-nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(6, 16, 43, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line-soft);
    padding: 1rem 5%;
    z-index: 1000;
    transition: padding 0.3s ease, background 0.3s ease;
}

nav.scrolled { padding: 0.55rem 5%; background: rgba(6, 16, 43, 0.97); }

nav .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    gap: 1rem;
}

nav .logo { display: flex; align-items: center; text-decoration: none; }
nav .logo img { height: 38px; display: block; }

nav ul {
    display: flex;
    list-style: none;
    gap: 1.9rem;
    align-items: center;
}

nav ul a {
    text-decoration: none;
    color: var(--accent);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color 0.2s;
}

nav ul a:hover { color: #ffffff; }

nav ul a.nav-cta {
    background: var(--blue);
    color: #fff;
    padding: 0.45rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    transition: background 0.2s;
}

nav ul a.nav-cta:hover { background: var(--blue-hover); }

.nav-controls { display: flex; align-items: center; gap: 0.75rem; }

.lang-toggle {
    background: transparent;
    border: 1px solid var(--line-dark);
    border-radius: 6px;
    font-family: var(--mono);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    color: var(--accent);
    cursor: pointer;
    padding: 0.35rem 0.6rem;
    line-height: 1;
    transition: border-color 0.2s, color 0.2s;
}

.lang-toggle:hover { border-color: var(--blue); color: #fff; }

.nav-burger {
    display: none;
    background: transparent;
    border: 1px solid var(--line-dark);
    border-radius: 6px;
    color: var(--accent);
    font-size: 1.1rem;
    line-height: 1;
    padding: 0.35rem 0.55rem;
    cursor: pointer;
}

/* === SECTION SCAFFOLD === */
section { padding: 6rem 5%; }

.section-inner { max-width: 1200px; margin: 0 auto; }

.band {
    background: var(--navy-deep);
    border-top: 1px solid var(--line-soft);
    border-bottom: 1px solid var(--line-soft);
}

.section-head { max-width: 720px; margin-bottom: 3rem; }

h1, h2, h3 { line-height: 1.2; }

h2 {
    font-size: clamp(1.7rem, 3.2vw, 2.3rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--tint);
}

.section-head p {
    margin-top: 0.9rem;
    color: var(--muted-navy);
    font-size: 1.05rem;
}

/* === BUTTONS === */
.cta-button, .cta-ghost {
    display: inline-block;
    padding: 0.85rem 1.7rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.2s;
}

.cta-button {
    background: var(--blue);
    color: #fff;
    border: 1px solid var(--blue);
}

.cta-button:hover { background: var(--blue-hover); border-color: var(--blue-hover); transform: translateY(-1px); }

.cta-ghost {
    background: transparent;
    color: var(--accent);
    border: 1px solid var(--line-dark);
}

.cta-ghost:hover { border-color: var(--blue); color: #fff; }

/* === HERO === */
.hero {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
    gap: 3rem;
    align-items: center;
    max-width: 1240px;
    margin: 0 auto;
    padding: 9.5rem 0 5rem;
    min-height: 92vh;
}

section#home { padding-top: 0; padding-bottom: 0; }

.hero-copy h1 {
    font-size: clamp(2.3rem, 4.6vw, 3.4rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    color: #ffffff;
}

.hero-copy .hero-subtitle {
    margin: 1.4rem 0 2.2rem;
    font-size: 1.1rem;
    color: var(--text);
    opacity: 0.9;
    max-width: 34rem;
}

.hero-copy .hero-subtitle strong { color: #ffffff; font-weight: 700; }

.hero-actions { display: flex; gap: 0.9rem; flex-wrap: wrap; }

.hero-media { position: relative; }

.hero-media::before {
    content: '';
    position: absolute;
    inset: -12% -8%;
    background:
        radial-gradient(closest-side at 60% 40%,
                        rgba(0, 102, 204, 0.32), transparent 70%),
        radial-gradient(closest-side at 20% 80%,
                        rgba(138, 43, 226, 0.16), transparent 70%);
    filter: blur(10px);
    z-index: 0;
}

/* === WINDOW FRAME (app footage chrome) === */
.window-frame {
    position: relative;
    z-index: 1;
    background: var(--navy-2);
    border: 1px solid var(--line-dark);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 24px 70px rgba(0, 0, 0, 0.5);
}

.window-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 12px;
    border-bottom: 1px solid var(--line-soft);
    background: rgba(4, 11, 30, 0.6);
}

.window-bar span {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--muted-navy);
    opacity: 0.45;
}

.window-bar .window-url {
    width: auto;
    height: auto;
    border-radius: 0;
    background: none;
    opacity: 1;
    margin-left: 10px;
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.08em;
    color: var(--muted-navy);
}

.window-frame video, .window-frame img { display: block; width: 100%; height: auto; }

/* === MEDIA PLAYER (chaptered hero + captioned section) === */
.media-player { position: relative; }

/* Clickable overlay over the hero's baked closing CTA. Inert during the
   walkthrough; becomes a real link to the contact form during the outro. */
.hero-cta {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    top: 30px;                 /* leave the window bar clear */
    z-index: 1;                /* below arrows/dots (z-index: 2) */
    display: block;
    pointer-events: none;
    opacity: 0;
    cursor: pointer;
}
.hero-cta.active { pointer-events: auto; }

.player-caption {
    position: absolute;
    top: 42px;
    left: 12px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-width: 72%;
    padding: 0.45rem 0.75rem;
    background: rgba(6, 16, 43, 0.86);
    border: 1px solid var(--line-dark);
    border-radius: 8px;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    pointer-events: none;
    transition: opacity 0.3s;
}

.player-eyebrow {
    font-family: var(--mono);
    font-size: 0.6rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--muted-navy);
}

.player-title { font-size: 0.82rem; font-weight: 600; color: #fff; line-height: 1.25; }

.player-arrow {
    position: absolute;
    top: 55%;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(6, 16, 43, 0.72);
    border: 1px solid var(--line-dark);
    color: #fff;
    font-size: 1.3rem;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s, background 0.2s;
    z-index: 2;
}

.media-player:hover .player-arrow,
.media-player:focus-within .player-arrow { opacity: 1; }
.player-arrow:hover { background: var(--blue); border-color: var(--blue); }
.player-arrow.prev { left: 10px; }
.player-arrow.next { right: 10px; }

.player-dots {
    position: absolute;
    bottom: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 6px;
    z-index: 2;
}

.player-dot {
    width: 7px;
    height: 7px;
    padding: 0;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.45);
    cursor: pointer;
    transition: width 0.2s, background 0.2s, border-radius 0.2s;
}

.player-dot.active { width: 18px; border-radius: 4px; background: var(--blue); }

/* Section player: full-width caption bar at the bottom (not a pill) */
.section-player .player-caption {
    top: auto;
    bottom: 0;
    left: 0;
    right: 0;
    max-width: none;
    flex-direction: row;
    align-items: baseline;
    gap: 0.7rem;
    padding: 0.7rem 1.1rem;
    border: none;
    border-top: 1px solid var(--line-dark);
    border-radius: 0;
    background: linear-gradient(0deg, rgba(6, 16, 43, 0.94), rgba(6, 16, 43, 0.78));
}

.section-player .player-eyebrow { font-size: 0.72rem; color: var(--blue); }
.section-player .player-title { font-size: 0.92rem; }

@media (prefers-reduced-motion: reduce) {
    .player-arrow { opacity: 1; }
}

/* === DEMO CLIPS === */
.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.demo-card { min-width: 0; }

/* Each still frames a different widget (a wide decision card, a tall
   trace list, a plot) — a fixed aspect + contain keeps the grid
   uniform, letterboxed on the same navy as the frame. */
.demo-card .window-frame img,
.demo-card .window-frame video {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: contain;
    background: var(--navy);
}

.demo-card .mono-label {
    display: block;
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: #5aa2e8;
    margin: 1.1rem 0 0.4rem;
}

.demo-card h3 { font-size: 1.1rem; color: var(--tint); margin-bottom: 0.35rem; }

.demo-card p { font-size: 0.95rem; color: var(--muted-navy); }

/* Capability chips: the breadth of methods aChEntic covers */
.capabilities {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
    max-width: 1200px;
    margin: -0.6rem 0 2.9rem;
    padding: 0;
}

.cap-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.55rem 1rem;
    border: 1px solid var(--line-dark);
    border-radius: 999px;
    background: var(--navy-2);
    color: var(--tint);
    font-size: 0.94rem;
    font-weight: 500;
}

.cap-chip svg { width: 19px; height: 19px; color: var(--accent); flex-shrink: 0; }

/* === INSTRUMENTS (USP) === */
.split {
    display: grid;
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 3.5rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.split-copy h2 { margin-bottom: 1rem; }

.split-copy p { color: var(--text); opacity: 0.9; margin-bottom: 1.4rem; max-width: 34rem; }

.split-copy .window-frame { margin: 0.4rem 0 1.6rem; }

.split-copy .outlook {
    font-family: var(--mono);
    font-size: 0.85rem;
    color: var(--accent);
    border-left: 2px solid var(--blue);
    padding-left: 0.9rem;
    margin-top: 0.4rem;
}

/* Link diagram: real instrument (top) ⇅ chat (below) */
.link-diagram { max-width: 410px; }

.instrument-illu {
    margin: 0;
    background: var(--navy-2);
    border: 1px solid var(--line-dark);
    border-radius: 14px;
    overflow: hidden;
}

.instrument-illu img { display: block; width: 100%; height: auto; padding: 0.85rem 1.05rem 0.25rem; }

/* bidirectional connector */
.link-pipe {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.35rem;
    padding: 0.9rem 0;
}

.link-pipe::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--nir), var(--blue));
    opacity: 0.55;
}

.pipe-dir {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    letter-spacing: 0.04em;
    color: var(--muted-navy);
    background: var(--navy);
    padding: 0.15rem 0.5rem;
    position: relative;
    z-index: 1;
}

.pipe-ar { color: var(--accent); font-size: 0.9rem; }

.pipe-badge {
    position: relative;
    z-index: 1;
    font-family: var(--mono);
    font-size: 0.64rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    background: rgba(0, 102, 204, 0.16);
    border: 1px solid rgba(0, 102, 204, 0.4);
    border-radius: 20px;
    padding: 0.25rem 0.8rem;
}

.chat-node {
    background: var(--navy-2);
    border: 1px solid var(--line-dark);
    border-radius: 14px;
    padding: 0.9rem 1rem 1.1rem;
}

.chat-node-head {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--mono);
    font-size: 0.66rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted-navy);
    padding-bottom: 0.7rem;
    margin-bottom: 0.7rem;
    border-bottom: 1px solid var(--line-soft);
}

.cn-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); flex-shrink: 0; }

.cn-bubble {
    font-size: 0.86rem;
    line-height: 1.4;
    padding: 0.5rem 0.75rem;
    border-radius: 10px;
    max-width: 85%;
    margin-bottom: 0.5rem;
}

.cn-bubble.agent {
    background: var(--navy-3);
    color: var(--text);
    border: 1px solid var(--line-soft);
}

.cn-bubble.user {
    background: var(--blue);
    color: #fff;
    margin-left: auto;
    margin-bottom: 0;
}

.instrument-illu figcaption {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 1.2rem 1rem;
    font-family: var(--mono);
    font-size: 0.76rem;
    letter-spacing: 0.03em;
    color: var(--accent);
}

.instrument-illu .tech-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--nir);
    box-shadow: 0 0 0 3px rgba(180, 83, 9, 0.22);
    flex-shrink: 0;
}

/* Connect flow: search → connect → details, as a compact vertical stepper */
.flow-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1.7rem;
}

.flow-step {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 1.1rem;
}

/* timeline spine linking the step numbers, running past each preview */
.flow-step:not(:last-child)::before {
    content: '';
    position: absolute;
    left: 21px;
    top: 46px;
    bottom: -1.7rem;
    width: 2px;
    background: linear-gradient(180deg, rgba(0, 102, 204, 0.45), rgba(0, 102, 204, 0.12));
}

.flow-n {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--mono);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--accent);
    background: rgba(0, 102, 204, 0.16);
    border: 1px solid rgba(0, 102, 204, 0.4);
}

.flow-text {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    padding-top: 0.2rem;
    min-width: 0;
}

.flow-title { color: var(--tint); font-size: 1.08rem; font-weight: 600; }

.flow-desc { color: var(--muted-navy); font-size: 0.96rem; line-height: 1.5; }

/* small screenshot preview under each step */
.flow-shot {
    margin-top: 0.7rem;
    max-width: 210px;
    border: 1px solid var(--line-dark);
    border-radius: 10px;
    overflow: hidden;
    background: #ffffff;
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.28);
}

.flow-shot img {
    display: block;
    width: 100%;
    aspect-ratio: 16 / 10;
    object-fit: contain;
    background: #ffffff;
}


/* === TRUST === */
.trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.trust-card {
    border: 1px solid var(--line-dark);
    border-radius: 10px;
    padding: 1.5rem;
    background: rgba(10, 26, 60, 0.55);
}

.trust-card h3 { font-size: 1rem; color: var(--tint); margin-bottom: 0.45rem; }

.trust-card p { font-size: 0.9rem; color: var(--muted-navy); }

/* === FAQ === */
.faq-container { max-width: 780px; margin: 0 auto; }

.faq-item {
    background: var(--navy-2);
    border: 1px solid var(--line-dark);
    border-radius: 10px;
    margin-bottom: 0.9rem;
    overflow: hidden;
    transition: border-color 0.25s;
}

.faq-item.active { border-color: rgba(0, 102, 204, 0.55); }

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    background: none;
    border: none;
    padding: 1.15rem 1.4rem;
    font-family: var(--sans);
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--tint);
    text-align: left;
    cursor: pointer;
}

.faq-icon {
    font-family: var(--mono);
    color: var(--blue);
    font-size: 1.2rem;
    transition: transform 0.3s;
    flex-shrink: 0;
}

.faq-item.active .faq-icon { transform: rotate(45deg); }

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}

.faq-item.active .faq-answer { max-height: 420px; }

.faq-answer p {
    padding: 0 1.4rem 1.3rem;
    color: var(--text);
    opacity: 0.85;
    font-size: 0.97rem;
}

/* === CONTACT === */
.contact-subtext {
    max-width: 620px;
    margin: -2rem auto 3rem;
    text-align: center;
    color: var(--muted-navy);
}

#contact .section-head { margin-left: auto; margin-right: auto; text-align: center; }

.contact-container {
    display: grid;
    grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
    gap: 3rem;
    max-width: 980px;
    margin: 0 auto;
    align-items: start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    background: var(--navy-2);
    border: 1px solid var(--line-dark);
    border-radius: 12px;
    padding: 2rem;
}

.contact-form input,
.contact-form textarea,
.unsubscribe-form input[type="email"] {
    background: var(--navy);
    border: 1px solid var(--line-dark);
    border-radius: 8px;
    padding: 0.85rem 1.1rem;
    font-size: 1rem;
    font-family: var(--sans);
    color: var(--tint);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
}

.contact-form textarea { min-height: 120px; resize: vertical; }

.contact-form input::placeholder,
.contact-form textarea::placeholder,
.unsubscribe-form input::placeholder { color: var(--muted-navy); }

.contact-form input:focus,
.contact-form textarea:focus,
.unsubscribe-form input[type="email"]:focus {
    border-color: var(--blue);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.22);
}

.submit-button {
    background: var(--blue);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.9rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--sans);
    cursor: pointer;
    transition: background 0.2s, transform 0.2s;
}

.submit-button:hover { background: var(--blue-hover); transform: translateY(-1px); }

.contact-info h3 { font-size: 1.05rem; color: var(--tint); margin-bottom: 1.4rem; }

.info-item {
    display: flex;
    gap: 0.9rem;
    margin-bottom: 1.4rem;
    align-items: flex-start;
}

.info-icon {
    flex-shrink: 0;
    width: 38px;
    height: 38px;
    border: 1px solid var(--line-dark);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--muted-navy);
}

.info-icon svg { width: 18px; height: 18px; stroke: currentColor; }

.info-item h4 {
    font-family: var(--mono);
    font-size: 0.68rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    font-weight: 500;
    color: var(--muted-navy);
    margin-bottom: 0.15rem;
}

.info-item p { color: var(--text); font-size: 0.97rem; }

.info-item a { color: var(--accent); text-decoration: none; }
.info-item a:hover { text-decoration: underline; }

/* === STATUS MESSAGES (newsletter) === */
.status-message {
    display: none;
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-top: 1.5rem;
    font-size: 0.97rem;
    line-height: 1.5;
}

.status-message.status-error {
    display: block;
    background: rgba(204, 51, 51, 0.12);
    color: #ffb3b3;
    border: 1px solid rgba(204, 51, 51, 0.45);
}

.status-message.status-success {
    display: block;
    background: rgba(45, 138, 78, 0.14);
    color: #8fd8a8;
    border: 1px solid rgba(45, 138, 78, 0.5);
}

/* === FUNDED BY === */
.funded-by {
    padding: 3.5rem 5%;
    text-align: center;
    background: var(--navy-deep);
    border-top: 1px solid var(--line-soft);
}

.funded-by p {
    font-family: var(--mono);
    font-size: 0.7rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--muted-navy);
    margin-bottom: 1.3rem;
}

.funded-logo-chip {
    display: inline-block;
    background: #ffffff;
    border-radius: 10px;
    padding: 0.9rem 1.8rem;
}

.funded-logo { height: 44px; display: block; }

/* === FOOTER === */
footer {
    background: var(--navy-deep);
    text-align: center;
    padding: 2.5rem 5%;
    border-top: 1px solid var(--line-soft);
}

.footer-links { margin-bottom: 0.9rem; }

.footer-links a {
    color: var(--muted-navy);
    text-decoration: none;
    margin: 0 1rem;
    font-size: 0.92rem;
    transition: color 0.2s;
}

.footer-links a:hover { color: var(--accent); }

.footer-copyright { color: rgba(136, 160, 200, 0.55); font-size: 0.85rem; }

/* === LEGAL / SIMPLE PAGES === */
.page-content {
    max-width: 760px;
    margin: 0 auto;
    padding: 9rem 5% 4.5rem;
}

.page-panel {
    background: var(--navy-2);
    border: 1px solid var(--line-dark);
    border-radius: 14px;
    padding: 2.6rem;
}

.page-content h1 {
    font-size: clamp(1.9rem, 3.4vw, 2.4rem);
    letter-spacing: -0.02em;
    color: var(--tint);
    margin-bottom: 1.8rem;
}

.page-panel h2 {
    font-size: 1.15rem;
    color: var(--accent);
    margin: 1.9rem 0 0.5rem;
}

.page-panel h2:first-child { margin-top: 0; }

.page-panel p, .page-panel li { color: var(--text); opacity: 0.88; font-size: 0.97rem; }

.page-panel ul { padding-left: 1.4rem; margin: 0.5rem 0; }

.page-panel a { color: var(--accent); }

/* === UNSUBSCRIBE FORM === */
.unsubscribe-form { display: flex; gap: 0.75rem; margin-top: 1.4rem; }

.unsubscribe-form input[type="email"] { flex: 1; }

.unsubscribe-form button {
    padding: 0.85rem 1.8rem;
    background: var(--blue);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.97rem;
    font-family: var(--sans);
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s;
}

.unsubscribe-form button:hover { background: var(--blue-hover); }

/* === THANK-YOU PAGE === */
.center-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 5%;
}

.thanks-card {
    text-align: center;
    background: var(--navy-2);
    border: 1px solid var(--line-dark);
    border-radius: 16px;
    padding: 3rem;
    max-width: 560px;
    animation: fadeInUp 0.7s ease-out;
}

.checkmark {
    width: 74px;
    height: 74px;
    border-radius: 50%;
    background: rgba(45, 138, 78, 0.14);
    border: 2px solid var(--success);
    color: var(--success);
    margin: 0 auto 1.8rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.3rem;
    animation: scaleIn 0.5s ease-out 0.25s both;
}

.thanks-card h1 { font-size: 2rem; color: var(--tint); margin-bottom: 0.9rem; }

.thanks-card > p { color: var(--text); opacity: 0.88; margin-bottom: 1.9rem; }

.countdown {
    margin-top: 1.8rem;
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--muted-navy);
}

.thanks-card .footer-links { margin-top: 2.4rem; margin-bottom: 0; }

/* === ANIMATIONS === */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
    from { transform: scale(0); }
    to   { transform: scale(1); }
}

.hero-copy > * { animation: fadeInUp 0.7s ease-out both; }
.hero-copy > *:nth-child(2) { animation-delay: 0.08s; }
.hero-copy > *:nth-child(3) { animation-delay: 0.16s; }
.hero-copy > *:nth-child(4) { animation-delay: 0.24s; }
.hero-media { animation: fadeInUp 0.8s ease-out 0.2s both; }

/* === RESPONSIVE === */
@media (max-width: 1024px) {
    .hero { grid-template-columns: 1fr; padding-top: 8rem; gap: 2.5rem; min-height: 0; }
    .split { grid-template-columns: 1fr; gap: 2.5rem; }
    .split .split-copy { order: 0; }
    .split .split-media { order: 1; }
}

@media (max-width: 860px) {
    nav ul {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(6, 16, 43, 0.98);
        border-bottom: 1px solid var(--line-dark);
        padding: 0.6rem 0 1rem;
    }
    nav ul.open { display: flex; }
    nav ul li { width: 100%; text-align: center; }
    nav ul a { display: block; padding: 0.8rem 1rem; }
    nav ul a.nav-cta { display: inline-block; margin-top: 0.5rem; }
    .nav-burger { display: block; }
}

@media (max-width: 768px) {
    section { padding: 4.5rem 5%; }
    .contact-container { grid-template-columns: 1fr; }
    .unsubscribe-form { flex-direction: column; }
    .page-panel { padding: 1.8rem; }
    .hero-copy h1 { font-size: 2.2rem; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}