/* =========================================================
   BIO SOURCE SUPPLY — Stylesheet
   Clean, professional theme for a research peptide supplier.
   Palette: deep navy + warm gold accent, soft neutrals.
   ========================================================= */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 90px;
}

:root {
    --navy-900: #0b1f33;
    --navy-800: #10294a;
    --navy-700: #17365e;
    --ink: #1f2a37;
    --text: #4b5563;
    --text-light: #6b7280;
    --gold: #c9a44c;
    --gold-dark: #b08f3a;
    --gold-light: #eed9a0;
    --bg: #ffffff;
    --bg-soft: #f6f8fb;
    --bg-frost: #eef2f7;
    --line: #e5e7eb;
    --radius: 18px;
    --radius-sm: 12px;
    --shadow-sm: 0 6px 18px rgba(16, 41, 74, 0.06);
    --shadow-md: 0 18px 45px rgba(16, 41, 74, 0.10);
    --shadow-lg: 0 30px 70px rgba(11, 31, 51, 0.22);
    --font: "Segoe UI", "Helvetica Neue", Arial, "Microsoft YaHei", sans-serif;
}

body {
    font-family: var(--font);
    color: var(--text);
    line-height: 1.7;
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

section {
    scroll-margin-top: 80px;
}

/* ---------- Typography helpers ---------- */
h1, h2, h3 {
    color: var(--navy-900);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(1.7rem, 3.4vw, 2.6rem);
    font-weight: 800;
}

h3 {
    font-size: 1.25rem;
    font-weight: 700;
}

h2 em {
    font-style: normal;
    color: var(--gold-dark);
}

.gp-eyebrow,
.gp-kicker {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--gold-dark);
    margin-bottom: 0.9rem;
}

.gp-section-heading {
    max-width: 640px;
    margin: 0 auto 3rem;
    text-align: center;
}

.gp-section-heading p {
    margin-top: 1rem;
    color: var(--text-light);
}

/* =========================================================
   Header
   ========================================================= */
.gp-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11, 31, 51, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 4px 20px rgba(11, 31, 51, 0.18);
}

.gp-header__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 76px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.gp-brand {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    color: #fff;
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.gp-brand img {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 0 0 2px rgba(201, 164, 76, 0.5);
}

.gp-nav {
    display: flex;
    gap: 1.75rem;
}

.gp-nav a {
    color: rgba(255, 255, 255, 0.82);
    font-size: 0.92rem;
    font-weight: 500;
    position: relative;
    padding: 0.3rem 0;
    transition: color 0.25s ease;
}

.gp-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0;
    height: 2px;
    background: var(--gold);
    transition: width 0.28s ease;
}

.gp-nav a:hover {
    color: #fff;
}

.gp-nav a:hover::after {
    width: 100%;
}

/* ---------- Buttons ---------- */
.gp-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 1.7rem;
    font-size: 0.92rem;
    font-weight: 700;
    border-radius: 999px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform 0.25s ease, box-shadow 0.25s ease,
                background 0.25s ease, color 0.25s ease;
}

.gp-button--gold {
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    color: var(--navy-900);
    box-shadow: 0 10px 22px rgba(201, 164, 76, 0.35);
}

.gp-button--gold:hover {
    transform: translateY(-3px);
    box-shadow: 0 16px 34px rgba(201, 164, 76, 0.45);
}

/* =========================================================
   Hero
   ========================================================= */
.gp-hero {
    position: relative;
    min-height: 86vh;
    display: flex;
    align-items: center;
    background:
        radial-gradient(1000px 500px at 85% -10%, rgba(201, 164, 76, 0.16), transparent),
        linear-gradient(135deg, var(--navy-900) 0%, var(--navy-700) 100%);
    color: #fff;
    overflow: hidden;
}

/* subtle geometric decor */
.gp-hero::before,
.gp-hero::after {
    content: "";
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.gp-hero::before {
    width: 520px;
    height: 520px;
    right: -140px;
    top: -120px;
}

.gp-hero::after {
    width: 340px;
    height: 340px;
    left: -120px;
    bottom: -120px;
    border-color: rgba(201, 164, 76, 0.18);
}

.gp-hero__content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 5rem 1.5rem;
    width: 100%;
}

.gp-hero h1 {
    color: #fff;
    font-size: clamp(2.2rem, 5.2vw, 3.8rem);
    font-weight: 800;
    max-width: 760px;
    margin-bottom: 1.4rem;
}

.gp-hero__lead {
    color: rgba(255, 255, 255, 0.82);
    font-size: clamp(1rem, 1.5vw, 1.2rem);
    max-width: 560px;
    margin-bottom: 1.2rem;
}

.gp-hero__note {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.82rem;
    margin-bottom: 2.2rem;
}

/* =========================================================
   Trust bar
   ========================================================= */
.gp-trust {
    background: var(--bg-frost);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 2.2rem 1.5rem;
    text-align: center;
}

.gp-trust h3 {
    font-size: 0.95rem;
    color: var(--navy-800);
    margin-bottom: 1.2rem;
    letter-spacing: 0.02em;
}

.gp-trust__items {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.gp-trust__items span {
    background: #fff;
    color: var(--ink);
    font-size: 0.88rem;
    font-weight: 600;
    padding: 0.6rem 1.3rem;
    border-radius: 999px;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-sm);
}

/* =========================================================
   Core strengths
   ========================================================= */
.gp-core {
    padding: 6rem 1.5rem;
}

.gp-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.8rem;
    max-width: 1200px;
    margin: 0 auto;
}

.gp-card {
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 2.4rem 2rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease,
                border-color 0.3s ease;
}

.gp-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: transparent;
}

.gp-card__icon {
    width: 60px;
    height: 60px;
    display: grid;
    place-items: center;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    color: var(--navy-900);
    font-weight: 800;
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 20px rgba(201, 164, 76, 0.28);
}

.gp-card h3 {
    margin-bottom: 0.8rem;
}

.gp-card p {
    color: var(--text-light);
    font-size: 0.96rem;
}

/* =========================================================
   Stats
   ========================================================= */
.gp-stats {
    background: linear-gradient(135deg, var(--navy-900), var(--navy-700));
    padding: 4rem 1.5rem;
}

.gp-stats__grid {
    max-width: 1080px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    text-align: center;
}

.gp-stat {
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.95rem;
}

.gp-stat strong {
    display: block;
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--gold-light);
    margin-bottom: 0.3rem;
}


/* =========================================================
   Process
   ========================================================= */
.gp-process {
    padding: 6rem 1.5rem;
    background: var(--bg-soft);
}

.gp-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.gp-steps article {
    background: #fff;
    border: 1px solid var(--line);
    border-top: 4px solid var(--gold);
    border-radius: var(--radius-sm);
    padding: 2rem 1.8rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.gp-steps article:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
}

.gp-step__num {
    font-size: 2rem;
    font-weight: 800;
    color: rgba(16, 41, 74, 0.16);
    line-height: 1;
    display: block;
    margin-bottom: 1rem;
}

.gp-steps h3 {
    margin-bottom: 0.6rem;
}

.gp-steps p {
    color: var(--text-light);
    font-size: 0.94rem;
}

/* =========================================================
   Research / split
   ========================================================= */
.gp-research {
    padding: 6rem 1.5rem;
}

.gp-split {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.25fr 0.85fr;
    gap: 3rem;
    align-items: start;
}

.gp-split h2 {
    margin-bottom: 1.2rem;
}

.gp-split > div > p {
    color: var(--text-light);
    margin-bottom: 1.8rem;
}

.gp-checks {
    display: grid;
    gap: 0.9rem;
}

.gp-checks li {
    position: relative;
    padding-left: 2.1rem;
    color: var(--ink);
    font-weight: 500;
}

.gp-checks li::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    width: 26px;
    height: 26px;
    display: grid;
    place-items: center;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    color: var(--navy-900);
    font-weight: 800;
    font-size: 0.8rem;
    border-radius: 50%;
}

.gp-app-card {
    background: var(--bg-frost);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 2.2rem 2rem;
}

.gp-app-card h3 {
    margin-bottom: 1rem;
}

.gp-app-card ul {
    display: grid;
    gap: 0.8rem;
    margin-bottom: 1.6rem;
}

.gp-app-card li {
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.96rem;
}

.gp-app-card li::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--gold);
}

.gp-text-link {
    color: var(--gold-dark);
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: gap 0.25s ease, color 0.25s ease;
}

.gp-text-link:hover {
    color: var(--navy-800);
    gap: 0.8rem;
}

/* =========================================================
   FAQ
   ========================================================= */
.gp-faq {
    padding: 6rem 1.5rem;
    background: var(--bg-soft);
}

.gp-faq__wrap {
    max-width: 820px;
    margin: 0 auto;
}

.gp-faq details {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-sm);
    margin-bottom: 0.9rem;
    overflow: hidden;
    transition: box-shadow 0.3s ease;
}

.gp-faq details[open] {
    box-shadow: 0 0 0 2px rgba(201, 164, 76, 0.35);
}

.gp-faq summary {
    cursor: pointer;
    padding: 1.2rem 1.5rem;
    font-weight: 600;
    color: var(--navy-900);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    transition: color 0.25s ease;
}

.gp-faq summary::after {
    content: "+";
    flex: 0 0 auto;
    width: 30px;
    height: 30px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--bg-frost);
    color: var(--gold-dark);
    font-weight: 700;
    font-size: 1.2rem;
    transition: transform 0.3s ease, background 0.3s ease;
}

.gp-faq details[open] summary::after {
    transform: rotate(45deg);
    background: var(--gold);
    color: #fff;
}

.gp-faq details p {
    padding: 0 1.5rem 1.3rem;
    color: var(--text-light);
    font-size: 0.96rem;
}


/* =========================================================
   Contact
   ========================================================= */
.gp-contact {
    padding: 6rem 1.5rem;
    background:
        radial-gradient(800px 400px at 100% 0%, rgba(201, 164, 76, 0.14), transparent),
        var(--navy-900);
    color: #fff;
    text-align: center;
}

.gp-contact__box {
    max-width: 680px;
    margin: 0 auto 2.5rem;
}

.gp-contact__box h2 {
    color: #fff;
    margin-bottom: 1rem;
}

.gp-contact__box > p {
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 2.2rem;
}

.gp-contact-form {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.9rem;
}

.gp-contact-form textarea {
    grid-column: 1 / -1;
    min-height: 130px;
    resize: vertical;
}

.gp-contact-form button {
    grid-column: 1 / -1;
    justify-self: center;
    margin-top: 0.5rem;
}

.gp-contact-form input,
.gp-contact-form textarea {
    padding: 0.9rem 1.1rem;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.07);
    color: #fff;
    font-family: inherit;
    font-size: 0.95rem;
    transition: background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.gp-contact-form input::placeholder,
.gp-contact-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.gp-contact-form input:focus,
.gp-contact-form textarea:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.12);
    border-color: var(--gold);
    box-shadow: 0 0 0 3px rgba(201, 164, 76, 0.28);
}

.gp-contact-form button {
    padding: 0.85rem 2.4rem;
    border-radius: 999px;
    border: none;
    cursor: pointer;
    font-family: inherit;
    font-weight: 700;
    font-size: 0.95rem;
    background: linear-gradient(135deg, var(--gold-light), var(--gold));
    color: var(--navy-900);
    box-shadow: 0 12px 26px rgba(201, 164, 76, 0.35);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.gp-contact-form button:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 36px rgba(201, 164, 76, 0.45);
}

.gp-contact__actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* =========================================================
   Footer
   ========================================================= */
.gp-footer {
    background: #081726;
    color: rgba(255, 255, 255, 0.68);
    padding: 4rem 1.5rem 2rem;
}

.gp-footer__grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 3rem;
    padding-bottom: 2.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.gp-footer h3 {
    color: #fff;
    margin-bottom: 1.2rem;
    font-size: 1.05rem;
}

.gp-footer__brand p:first-child img {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    margin-bottom: 1rem;
    box-shadow: 0 0 0 2px rgba(201, 164, 76, 0.5);
}

.gp-footer ul {
    display: grid;
    gap: 0.75rem;
}

.gp-footer a {
    color: rgba(255, 255, 255, 0.68);
    transition: color 0.25s ease, padding-left 0.25s ease;
}

.gp-footer a:hover {
    color: var(--gold-light);
    padding-left: 4px;
}

.gp-footer__copy {
    max-width: 1200px;
    margin: 2rem auto 0;
    font-size: 0.85rem;
    text-align: center;
    color: rgba(255, 255, 255, 0.45);
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 900px) {
    .gp-nav {
        display: none;
    }

    .gp-cards {
        grid-template-columns: 1fr;
        max-width: 520px;
    }

    .gp-stats__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }

    .gp-steps {
        grid-template-columns: repeat(2, 1fr);
    }

    .gp-split {
        grid-template-columns: 1fr;
    }

    .gp-footer__grid {
        grid-template-columns: 1fr 1fr;
    }

    .gp-footer__brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 560px) {
    .gp-header__inner {
        height: 66px;
    }

    .gp-brand img {
        width: 36px;
        height: 36px;
    }

    .gp-brand {
        font-size: 0.9rem;
    }

    .gp-header__inner .gp-button {
        padding: 0.6rem 1.1rem;
        font-size: 0.8rem;
    }

    .gp-steps {
        grid-template-columns: 1fr;
    }

    .gp-contact-form {
        grid-template-columns: 1fr;
    }

    .gp-stats__grid {
        grid-template-columns: 1fr;
    }

    .gp-footer__grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}