/* ==========================================================================
   Protein Diary — proteindiary.com
   Static, no build step, no JS. Palette per assets/brand/BRAND.md:
     Navy  #122A4E  (ink, mark, wordmark)
     Blue  #00ACDB  (drop, accents)
     Cream #FFF7EA  (backgrounds)
   ========================================================================== */

:root {
    --navy: #122A4E;
    --blue: #00ACDB;
    --cream: #FFF7EA;

    --bg: var(--cream);
    --bg-raised: #FFFDF7;
    --ink: var(--navy);
    --ink-soft: rgba(18, 42, 78, 0.72);
    --ink-faint: rgba(18, 42, 78, 0.45);
    --rule: rgba(18, 42, 78, 0.14);
    --accent: #0089B0;          /* blue, darkened for AA contrast on cream */
    --accent-bright: var(--blue);
    --band-bg: var(--navy);     /* privacy proof band */
    --band-ink: var(--cream);
    --band-ink-soft: rgba(255, 247, 234, 0.75);
    --shadow: 0 1px 2px rgba(18, 42, 78, 0.06), 0 12px 32px -16px rgba(18, 42, 78, 0.25);

    --font-sans: "Avenir Next", Avenir, "Segoe UI", system-ui, -apple-system, "Helvetica Neue", sans-serif;
    --measure: 62ch;
    --radius: 14px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0C1B33;
        --bg-raised: #16294A;
        --ink: #F3EDE0;
        --ink-soft: rgba(243, 237, 224, 0.74);
        --ink-faint: rgba(243, 237, 224, 0.48);
        --rule: rgba(243, 237, 224, 0.16);
        --accent: #2FC3EA;
        --accent-bright: #2FC3EA;
        --band-bg: #081224;
        --band-ink: #F3EDE0;
        --band-ink-soft: rgba(243, 237, 224, 0.72);
        --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px -16px rgba(0, 0, 0, 0.6);
    }
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

* { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 1.0625rem;
    line-height: 1.65;
    color: var(--ink);
    background: var(--bg);
}

h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.015em;
    margin: 0 0 0.6em;
    text-wrap: balance;
}

p { margin: 0 0 1em; }

a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-bright); }

img { max-width: 100%; height: auto; }

::selection { background: var(--blue); color: var(--navy); }

.container {
    max-width: 980px;
    margin: 0 auto;
    padding: 0 1.375rem;
}

.skip-link {
    position: absolute;
    left: -200vw;
    top: 0;
    background: var(--navy);
    color: var(--cream);
    padding: 0.5rem 1rem;
}
.skip-link:focus { left: 0; z-index: 100; }

/* --------------------------------------------------------------------------
   Header / nav
   -------------------------------------------------------------------------- */

.site-header {
    border-bottom: 1px solid var(--rule);
    background: var(--bg);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding-top: 0.9rem;
    padding-bottom: 0.9rem;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    color: var(--ink);
}

.brand-mark {
    width: 40px;
    height: 40px;
    padding: 5px;
    background: var(--cream);
    border: 1px solid rgba(18, 42, 78, 0.12);
    border-radius: 10px;
    display: block;
    object-fit: contain;
}

.brand-name {
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.01em;
    white-space: nowrap;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.4rem;
    font-size: 0.95rem;
    font-weight: 600;
}

.site-nav a {
    color: var(--ink-soft);
    text-decoration: none;
}
.site-nav a:hover { color: var(--accent); }

@media (max-width: 560px) {
    .site-nav { gap: 1rem; font-size: 0.9rem; }
    .site-nav .nav-optional { display: none; }
}

/* --------------------------------------------------------------------------
   Hero
   -------------------------------------------------------------------------- */

.hero {
    position: relative;
    overflow: hidden;
    padding: 4.5rem 0 4rem;
}

/* oversized, very faint water-drop glow — atmosphere without an image */
.hero::before {
    content: "";
    position: absolute;
    top: -22rem;
    right: -16rem;
    width: 44rem;
    height: 44rem;
    border-radius: 50%;
    background: radial-gradient(circle at center, rgba(0, 172, 219, 0.16), transparent 62%);
    pointer-events: none;
}

.hero .container { position: relative; }

.eyebrow {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    border: 1px solid var(--rule);
    border-radius: 999px;
    padding: 0.3rem 0.85rem;
    margin-bottom: 1.4rem;
}

.hero h1 {
    font-size: clamp(2.3rem, 6.5vw, 3.9rem);
    max-width: 17ch;
    margin-bottom: 0.5em;
}

.hero h1 .accent { color: var(--accent); }

.hero-sub {
    font-size: clamp(1.1rem, 2.4vw, 1.3rem);
    color: var(--ink-soft);
    max-width: 46ch;
    margin-bottom: 2rem;
}

.store-badges {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.9rem;
}

.store-badge {
    display: inline-flex;
    flex-direction: column;
    line-height: 1.25;
    padding: 0.55rem 1.15rem;
    border: 1.5px solid var(--ink);
    border-radius: 10px;
    color: var(--ink);
    background: transparent;
}

.store-badge .badge-small {
    font-size: 0.66rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-faint);
}

.store-badge .badge-big {
    font-size: 1rem;
    font-weight: 700;
}

.hero-trust {
    font-size: 0.95rem;
    color: var(--ink-faint);
    margin: 0;
}

/* staggered load-in */
@media (prefers-reduced-motion: no-preference) {
    .hero .eyebrow,
    .hero h1,
    .hero-sub,
    .hero .store-badges,
    .hero-trust {
        animation: rise-in 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
    }
    .hero h1 { animation-delay: 0.08s; }
    .hero-sub { animation-delay: 0.16s; }
    .hero .store-badges { animation-delay: 0.24s; }
    .hero-trust { animation-delay: 0.3s; }
}

@keyframes rise-in {
    from { opacity: 0; transform: translateY(14px); }
    to { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------------------
   Sections
   -------------------------------------------------------------------------- */

.section { padding: 4rem 0; }

.section-kicker {
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

.section h2 {
    font-size: clamp(1.7rem, 4vw, 2.4rem);
    max-width: 24ch;
}

.section-sub {
    color: var(--ink-soft);
    max-width: var(--measure);
    margin-bottom: 2.25rem;
}

/* Features */

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
}

.feature-card {
    background: var(--bg-raised);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    padding: 1.6rem 1.5rem 1.4rem;
    box-shadow: var(--shadow);
}

.feature-card .glyph {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: rgba(0, 172, 219, 0.12);
    color: var(--accent);
    margin-bottom: 1rem;
}

.feature-card .glyph svg { display: block; }

.feature-card h3 { font-size: 1.15rem; margin-bottom: 0.4em; }
.feature-card p { color: var(--ink-soft); font-size: 0.98rem; margin: 0; }

.feature-note {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--ink-faint);
    max-width: var(--measure);
}

/* Privacy proof band */

.privacy-band {
    background: var(--band-bg);
    color: var(--band-ink);
    padding: 4.5rem 0;
}

.privacy-band .section-kicker { color: var(--accent-bright); }

.privacy-claims {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 0;
    border-top: 1px solid rgba(255, 247, 234, 0.2);
    border-bottom: 1px solid rgba(255, 247, 234, 0.2);
    margin: 2.25rem 0 1.75rem;
}

.privacy-claims > div {
    padding: 1.5rem 1.25rem 1.5rem 0;
}

.privacy-claims .claim {
    display: block;
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.privacy-claims .claim-sub {
    display: block;
    margin-top: 0.35rem;
    font-size: 0.92rem;
    color: var(--band-ink-soft);
}

.privacy-band .statement {
    font-size: clamp(1.25rem, 3vw, 1.7rem);
    font-weight: 700;
    max-width: 30ch;
}

.privacy-band .statement .accent { color: var(--accent-bright); }

.privacy-band .fine {
    color: var(--band-ink-soft);
    font-size: 0.95rem;
    max-width: var(--measure);
    margin-bottom: 0;
}

.privacy-band a { color: var(--accent-bright); }

/* Pricing */

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    align-items: start;
}

.price-card {
    background: var(--bg-raised);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    padding: 1.75rem 1.6rem;
    box-shadow: var(--shadow);
}

.price-card.premium { border-top: 4px solid var(--blue); }

.price-card h3 { font-size: 1.2rem; }

.price {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0.2rem 0 0.1rem;
}

.price .per { font-size: 1rem; font-weight: 600; color: var(--ink-faint); }

.price-alt {
    font-size: 0.95rem;
    color: var(--ink-soft);
    margin-bottom: 1.1rem;
}

.price-card ul {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 0.97rem;
    color: var(--ink-soft);
}

.price-card li {
    padding: 0.42rem 0 0.42rem 1.5rem;
    position: relative;
    border-top: 1px solid var(--rule);
}

.price-card li::before {
    content: "";
    position: absolute;
    left: 0.1rem;
    top: 0.95rem;
    width: 0.55rem;
    height: 0.3rem;
    border-left: 2px solid var(--accent);
    border-bottom: 2px solid var(--accent);
    transform: rotate(-45deg);
}

.pricing-note {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--ink-faint);
    max-width: var(--measure);
}

/* Waitlist */

.waitlist {
    text-align: center;
    padding: 4.5rem 0;
}

.waitlist h2, .waitlist .section-sub { margin-left: auto; margin-right: auto; }

.btn-primary {
    display: inline-block;
    background: var(--navy);
    color: var(--cream);
    font-weight: 700;
    font-size: 1.05rem;
    text-decoration: none;
    padding: 0.85rem 1.9rem;
    border-radius: 999px;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary:hover {
    color: var(--cream);
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

@media (prefers-color-scheme: dark) {
    .btn-primary { background: var(--blue); color: #081224; }
    .btn-primary:hover { color: #081224; }
}

.waitlist .fine {
    margin-top: 1rem;
    font-size: 0.88rem;
    color: var(--ink-faint);
}

/* Disclaimer strip */

.disclaimer {
    border-top: 1px solid var(--rule);
    padding: 2rem 0;
    font-size: 0.88rem;
    color: var(--ink-faint);
}

.disclaimer p { max-width: none; margin: 0; }

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */

.site-footer {
    border-top: 1px solid var(--rule);
    padding: 2.5rem 0 2.75rem;
    font-size: 0.92rem;
    color: var(--ink-soft);
}

.footer-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 1.5rem 3rem;
    margin-bottom: 1.75rem;
}

.footer-grid h4 {
    font-size: 0.8rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 0.6rem;
}

.footer-grid ul { list-style: none; margin: 0; padding: 0; }
.footer-grid li { margin-bottom: 0.35rem; }
.footer-grid a { color: var(--ink-soft); text-decoration: none; }
.footer-grid a:hover { color: var(--accent); }

.footer-bottom {
    border-top: 1px solid var(--rule);
    padding-top: 1.25rem;
    font-size: 0.85rem;
    color: var(--ink-faint);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.5rem 2rem;
}

.footer-bottom p { margin: 0; }

/* --------------------------------------------------------------------------
   Legal pages (privacy.html / terms.html)
   -------------------------------------------------------------------------- */

.page-header {
    padding: 3.25rem 0 1rem;
}

.page-header h1 { font-size: clamp(2rem, 5vw, 2.8rem); }

.page-header .updated {
    color: var(--ink-faint);
    font-size: 0.95rem;
}

.legal {
    padding: 1rem 0 4rem;
}

.legal .container { max-width: 780px; }

.legal h2 {
    font-size: 1.35rem;
    margin-top: 2.4em;
    padding-top: 1.2em;
    border-top: 1px solid var(--rule);
}

.legal h3 { font-size: 1.08rem; margin-top: 1.8em; }

.legal p, .legal li { color: var(--ink-soft); }

.legal strong { color: var(--ink); }

.legal ul { padding-left: 1.3rem; }
.legal li { margin-bottom: 0.4rem; }

.legal .summary-box {
    background: var(--bg-raised);
    border: 1px solid var(--rule);
    border-left: 4px solid var(--blue);
    border-radius: var(--radius);
    padding: 1.3rem 1.4rem;
    margin: 1.5rem 0 0.5rem;
}

.legal .summary-box p:last-child { margin-bottom: 0; }