/* payload/payload.css — Payload product marketing page styles
   Accent: --sc-accent (#007acc blue) — uses only existing design tokens from style.css
*/

/* ─────────────────────────────────────────
   CTA buttons (not defined in style.css)
───────────────────────────────────────── */
.cta-primary {
    display: inline-block;
    padding: 0.75rem 2rem;
    background: var(--sc-accent);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    text-decoration: none;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.cta-primary:hover {
    opacity: 0.85;
    transform: translateY(-2px);
}

.cta-secondary {
    display: inline-block;
    padding: 0.75rem 2rem;
    border: 1px solid var(--sc-accent);
    color: var(--sc-accent);
    border-radius: 6px;
    font-size: 0.95rem;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease;
}

.cta-secondary:hover {
    background: var(--sc-accent);
    color: #fff;
}

/* ─────────────────────────────────────────
   Hero
───────────────────────────────────────── */
#payload-hero {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    min-height: 100vh;
    min-height: 100dvh;
    padding: 6rem 2rem 5rem;
    background: radial-gradient(ellipse at 50% 40%, #001624 0%, #000 70%);
    overflow: hidden;
}

/* Subtle starfield overlay */
#payload-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(1px 1px at 18% 22%, rgba(255,255,255,0.55) 0%, transparent 100%),
        radial-gradient(1px 1px at 44% 58%, rgba(255,255,255,0.35) 0%, transparent 100%),
        radial-gradient(1px 1px at 72% 28%, rgba(255,255,255,0.45) 0%, transparent 100%),
        radial-gradient(1px 1px at 83% 72%, rgba(255,255,255,0.30) 0%, transparent 100%),
        radial-gradient(1px 1px at 11% 68%, rgba(255,255,255,0.35) 0%, transparent 100%),
        radial-gradient(1px 1px at 57% 88%, rgba(255,255,255,0.25) 0%, transparent 100%),
        radial-gradient(2px 2px at 62% 42%, rgba(0, 122, 204, 0.4) 0%, transparent 100%),
        radial-gradient(2px 2px at 33% 52%, rgba(0, 122, 204, 0.3) 0%, transparent 100%),
        radial-gradient(2px 2px at 88% 35%, rgba(0, 122, 204, 0.25) 0%, transparent 100%);
    pointer-events: none;
}

.payload-eyebrow {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.25em;
    color: var(--sc-text-muted);
    margin: 0 0 0.75rem;
    opacity: 0;
    animation: fadeIn 0.8s ease-out forwards;
}

.payload-hero-title {
    font-size: clamp(3.5rem, 14vw, 8rem);
    font-weight: 700;
    letter-spacing: 0.1em;
    margin: 0 0 0.5rem;
    color: var(--sc-text-light);
    opacity: 0;
    animation: fadeIn 1s ease-out 0.3s forwards;
}

.payload-hero-tagline {
    font-size: clamp(0.85rem, 2vw, 1.15rem);
    font-style: italic;
    letter-spacing: 0.06em;
    color: var(--sc-accent);
    margin: 0 0 1.5rem;
    opacity: 0;
    animation: fadeIn 1s ease-out 0.65s forwards;
}

.payload-hero-sub {
    font-size: clamp(0.95rem, 2.5vw, 1.2rem);
    color: var(--sc-text-dim);
    line-height: 1.75;
    margin: 0 0 2.5rem;
    max-width: min(620px, 90vw);
    opacity: 0;
    animation: fadeIn 1s ease-out 1s forwards;
}

.payload-cta-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    opacity: 0;
    animation: fadeIn 1s ease-out 1.4s forwards;
}

/* ─────────────────────────────────────────
   Section shared utilities
───────────────────────────────────────── */
.payload-section-inner {
    max-width: 1100px;
    margin: 0 auto;
}

.section-title {
    font-size: clamp(1.6rem, 4vw, 2.4rem);
    text-align: center;
    margin: 0 0 0.6rem;
    color: var(--sc-text-light);
}

.section-sub {
    text-align: center;
    color: var(--sc-text-faint);
    font-size: 1rem;
    line-height: 1.7;
    max-width: 640px;
    margin: 0 auto 3rem;
}

/* ─────────────────────────────────────────
   Problem / Solution
───────────────────────────────────────── */
#payload-problem {
    padding: 5rem 1.5rem;
    background: var(--sc-bg-header);
    border-top: 1px solid var(--sc-border-dark);
    border-bottom: 1px solid var(--sc-border-dark);
}

.compare-grid {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.compare-col {
    flex: 1;
    padding: 2rem;
    border-radius: 8px;
}

.compare-old {
    background: var(--sc-bg-dark);
    border: 1px solid var(--sc-border);
}

.compare-new {
    background: rgba(0, 122, 204, 0.05);
    border: 1px solid var(--sc-accent);
}

.compare-heading {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    margin: 0 0 1.25rem;
}

.compare-heading-old {
    color: var(--sc-text-muted);
}

.compare-heading-new {
    color: var(--sc-accent);
}

.compare-divider {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 0;
    font-size: 1.8rem;
    color: var(--sc-border);
}

.compare-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.compare-list li {
    padding: 0.55rem 0;
    line-height: 1.6;
    border-bottom: 1px solid var(--sc-border-subtle);
    color: var(--sc-text-dim);
    font-size: 0.92rem;
}

.compare-list li:last-child {
    border-bottom: none;
}

.compare-old .compare-list li::before {
    content: '✕  ';
    color: var(--sc-text-subtle);
    font-size: 0.8em;
}

.compare-new .compare-list li::before {
    content: '✓  ';
    color: var(--sc-accent);
    font-size: 0.8em;
}

/* ─────────────────────────────────────────
   Features grid
───────────────────────────────────────── */
#payload-features {
    padding: 5rem 1.5rem;
    background: var(--sc-bg-dark);
}

.feature-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1.5rem;
}

.feature-card {
    background: var(--sc-bg-panel);
    border: 1px solid var(--sc-border);
    border-radius: 12px;
    padding: 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 32px var(--sc-accent-shadow);
}

.feature-card-icon {
    font-size: 2rem;
    color: var(--sc-accent);
    margin-bottom: 0.75rem;
}

.feature-card h3 {
    font-size: 1.15rem;
    margin: 0 0 1rem;
    color: var(--sc-text-light);
    letter-spacing: 0.02em;
}

.feature-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.feature-card ul li {
    padding: 0.4rem 0;
    color: var(--sc-text-dim);
    font-size: 0.9rem;
    line-height: 1.6;
    border-bottom: 1px solid var(--sc-border-subtle);
}

.feature-card ul li:last-child {
    border-bottom: none;
}

.feature-card ul li::before {
    content: '— ';
    color: var(--sc-accent);
    font-size: 0.85em;
}

/* ─────────────────────────────────────────
   How it works
───────────────────────────────────────── */
#payload-how {
    padding: 5rem 1.5rem;
    background: var(--sc-bg-header);
    border-top: 1px solid var(--sc-border-dark);
    border-bottom: 1px solid var(--sc-border-dark);
}

.steps-row {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0;
}

.step-item {
    text-align: center;
    padding: 2rem 1.5rem;
    max-width: 300px;
}

.step-number {
    width: 3rem;
    height: 3rem;
    line-height: 3rem;
    border-radius: 50%;
    background: var(--sc-accent);
    color: #fff;
    font-size: 1.2rem;
    font-weight: 700;
    margin: 0 auto 1rem;
}

.step-item h3 {
    font-size: 1.1rem;
    margin: 0 0 0.65rem;
    color: var(--sc-text-light);
}

.step-item p {
    font-size: 0.9rem;
    line-height: 1.75;
    color: var(--sc-text-dim);
    margin: 0;
}

.step-connector {
    font-size: 2rem;
    color: var(--sc-accent);
    padding: 0.5rem;
    transform: rotate(90deg);
    opacity: 0.6;
}

/* ─────────────────────────────────────────
   Integration callout
───────────────────────────────────────── */
#payload-integration {
    padding: 5rem 1.5rem;
    background: var(--sc-bg-dark);
}

.integration-inner {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    align-items: center;
}

.integration-text {
    max-width: 540px;
    width: 100%;
}

.integration-text h2 {
    font-size: clamp(1.5rem, 3.5vw, 2.2rem);
    margin: 0 0 1rem;
    color: var(--sc-text-light);
}

.integration-text p {
    color: var(--sc-text-dim);
    line-height: 1.8;
    font-size: 0.95rem;
    margin: 0 0 1rem;
}

.integration-text code {
    font-family: 'Consolas', 'Courier New', monospace;
    background: var(--sc-bg-panel);
    border: 1px solid var(--sc-border);
    border-radius: 4px;
    padding: 0.1em 0.4em;
    font-size: 0.88em;
    color: var(--sc-accent);
}

.integration-text .panel-link {
    margin-top: 0.75rem;
}

/* Abstract domain diagram */
.integration-visual {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    width: 100%;
    max-width: 380px;
}

.int-vis-row {
    display: flex;
    gap: 0.6rem;
}

.int-vis-block {
    padding: 0.7rem 1rem;
    border-radius: 6px;
    font-size: 0.78rem;
    font-family: 'Consolas', 'Courier New', monospace;
    text-align: center;
    border: 1px solid var(--sc-border);
    background: var(--sc-bg-panel);
    color: var(--sc-text-dim);
}

.int-vis-domain {
    width: 100%;
    background: var(--sc-bg-header);
    border-color: var(--sc-border);
    color: var(--sc-text-faint);
    font-size: 0.85rem;
    letter-spacing: 0.06em;
    font-weight: 600;
}

.int-vis-home,
.int-vis-about,
.int-vis-contact {
    flex: 1;
}

.int-vis-shop {
    flex: 2;
    border-color: var(--sc-accent);
    color: var(--sc-accent);
    background: rgba(0, 122, 204, 0.06);
    font-weight: 600;
}

/* ─────────────────────────────────────────
   CTA footer
───────────────────────────────────────── */
#payload-cta {
    text-align: center;
    padding: 6rem 2rem;
    background: linear-gradient(180deg, var(--sc-bg-dark) 0%, #001624 100%);
}

#payload-cta h2 {
    font-size: clamp(1.8rem, 5vw, 3rem);
    margin: 0 0 0.75rem;
    color: var(--sc-text-light);
}

#payload-cta p {
    color: var(--sc-text-faint);
    margin: 0 auto 2rem;
    font-size: 1rem;
    line-height: 1.7;
    max-width: 520px;
}

/* ─────────────────────────────────────────
   Responsive — tablet (≥ 600px)
───────────────────────────────────────── */
@media (min-width: 600px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* 5th card spans both columns */
    .feature-card:last-child {
        grid-column: 1 / -1;
    }
}

@media (min-width: 768px) {
    .steps-row {
        flex-direction: row;
        justify-content: center;
        align-items: flex-start;
    }

    .step-connector {
        transform: none;
        margin-top: 1.75rem;
    }

    .compare-grid {
        flex-direction: row;
        align-items: flex-start;
    }

    .compare-divider {
        padding: 0 1rem;
        align-self: center;
        transform: none;
    }
}

/* ─────────────────────────────────────────
   Responsive — desktop (≥ 900px)
───────────────────────────────────────── */
@media (min-width: 900px) {
    .integration-inner {
        flex-direction: row;
        align-items: flex-start;
        justify-content: center;
        gap: 4rem;
    }

    .integration-text {
        flex: 1;
    }

    .integration-visual {
        flex: 0 0 360px;
        margin-top: 0.25rem;
    }
}

/* ─────────────────────────────────────────
   Responsive — wide desktop (≥ 1200px)
   6-col grid: items 1-3 span 2 cols, items 4-5 span 3 cols
───────────────────────────────────────── */
@media (min-width: 1200px) {
    .feature-grid {
        grid-template-columns: repeat(6, 1fr);
    }

    .feature-card:nth-child(1),
    .feature-card:nth-child(2),
    .feature-card:nth-child(3) {
        grid-column: span 2;
    }

    .feature-card:nth-child(4),
    .feature-card:nth-child(5) {
        grid-column: span 3;
    }
}

/* ─────────────────────────────────────────
   Responsive — small phones (≤ 479px)
───────────────────────────────────────── */
@media (max-width: 479px) {
    #payload-hero {
        padding: 5rem 1.25rem 4rem;
    }

    .payload-hero-title {
        font-size: clamp(3rem, 18vw, 5rem);
    }

    #payload-problem,
    #payload-features,
    #payload-how,
    #payload-integration {
        padding-top: 3.5rem;
        padding-bottom: 3.5rem;
    }

    #payload-cta {
        padding-top: 3.5rem;
        padding-bottom: 3.5rem;
    }

    .compare-col {
        padding: 1.5rem 1.25rem;
    }

    .feature-card {
        padding: 1.5rem 1.25rem;
    }
}

/* ─────────────────────────────────────────
   Responsive — large desktop (≥ 1280px)
───────────────────────────────────────── */
@media (min-width: 1280px) {
    #payload-problem,
    #payload-features,
    #payload-how,
    #payload-integration {
        padding: 7rem 4rem;
    }

    #payload-cta {
        padding: 8rem 4rem;
    }
}