/* ============================
   GLOBAL RESET & BASE
   ============================ */

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

html, body {
    font-family: "Inter", sans-serif;
    background-color: #0f172a;
    color: #e2e8f0;
    line-height: 1.6;
    overflow-x: hidden;
    padding-bottom: 120px;
}

/* ============================
   HEADER (Corporate)
   ============================ */

.vr-header {
    width: 100%;
    background-color: #0f172a;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 9998;
}

.vr-header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.vr-header-logo {
    color: #f8fafc;
    font-size: 1.3rem;
    font-weight: 700;
    text-decoration: none;
    letter-spacing: 0.5px;
}

    .vr-header-logo:hover {
        color: #38bdf8;
    }

/* ============================
   DESKTOP NAVIGATION
   ============================ */

.desktop-nav {
    display: flex;
    align-items: center;
}

.vr-nav a {
    color: #e2e8f0;
    text-decoration: none;
    margin-left: 28px;
    font-size: 1rem;
    font-weight: 500;
    transition: 0.2s ease;
}

    .vr-nav a:hover {
        color: #38bdf8;
    }

/* ============================
   DESKTOP RESEARCH DROPDOWN
   ============================ */

.vr-dropdown {
    position: relative;
    display: inline-block;
    margin-left: 28px;
}

.vr-dropbtn {
    background: none;
    border: none;
    color: #e2e8f0;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0;
    transition: 0.2s ease;
}

    .vr-dropbtn:hover {
        color: #38bdf8;
    }

.vr-dropdown-content {
    display: none;
    position: absolute;
    background-color: #1e293b;
    min-width: 180px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 4px;
    padding: 6px 0;
    z-index: 1000;
}

    .vr-dropdown-content a {
        color: #cbd5e1;
        padding: 10px 14px;
        text-decoration: none;
        display: block;
        font-size: 0.95rem;
    }

        .vr-dropdown-content a:hover {
            background-color: #334155;
            color: #38bdf8;
        }

.vr-dropdown:hover .vr-dropdown-content {
    display: block;
}

/* ============================
   HAMBURGER MENU (Mobile)
   ============================ */

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

    .hamburger span {
        width: 26px;
        height: 3px;
        background: #e2e8f0;
        transition: 0.3s;
    }

    .hamburger.open span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.open span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.open span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

/* ============================
   MOBILE NAVIGATION PANEL
   ============================ */

.mobile-nav {
    display: none;
    flex-direction: column;
    background-color: #0f172a;
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 20px;
}

    .mobile-nav.open {
        display: flex;
    }

    .mobile-nav a {
        color: #e2e8f0;
        text-decoration: none;
        padding: 12px 0;
        font-size: 1.2rem;
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }

/* ============================
   MOBILE RESEARCH DROPDOWN
   ============================ */

.mobile-dropdown {
    width: 100%;
    margin-top: 10px;
}

.mobile-dropbtn {
    background: none;
    border: none;
    color: #e2e8f0;
    font-size: 1.3rem;
    font-weight: 600;
    cursor: pointer;
    padding: 12px 0;
    width: 100%;
    text-align: left;
}

.mobile-dropdown-content {
    display: none;
    flex-direction: column;
    margin-top: 10px;
    padding-left: 10px;
}

    .mobile-dropdown-content a {
        padding: 10px 0;
        font-size: 1.1rem;
        color: #cbd5e1;
    }

.mobile-dropdown.open .mobile-dropdown-content {
    display: flex;
}

/* ============================
   RESPONSIVE BREAKPOINT
   ============================ */

@media (max-width: 900px) {
    .desktop-nav {
        display: none;
    }

    .hamburger {
        display: flex;
    }
}

/* ============================
   ADMIN BAR
   ============================ */

.vr-admin-bar {
    width: 100%;
    background-color: #1e293b;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.vr-admin-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.vr-admin-badge {
    background-color: #38bdf8;
    color: #0f172a;
    padding: 4px 10px;
    border-radius: 4px;
    font-weight: 700;
    font-size: 0.8rem;
}

.vr-admin-welcome {
    color: #f8fafc;
    font-size: 1rem;
}

.vr-admin-right {
    display: flex;
    gap: 20px;
}

.vr-admin-link {
    color: #cbd5e1;
    text-decoration: none;
    font-size: 0.95rem;
}

    .vr-admin-link:hover {
        color: #38bdf8;
    }

.vr-admin-logout {
    background-color: #dc2626;
    color: white;
    padding: 6px 14px;
    border-radius: 4px;
    font-weight: 600;
    text-decoration: none;
}

    .vr-admin-logout:hover {
        background-color: #ef4444;
    }

/* ============================
   MAIN CONTENT
   ============================ */

.vr-main {
    max-width: 1100px;
    margin: 40px auto 0 auto;
    padding: 0 20px;
}

/* ============================
    vr-logo
   ============================ */
.vr-logo-container {
    text-align: center;
    margin-top: 40px;
    margin-bottom: 30px;
}

.vr-logo {
    max-width: 160px;
    height: auto;
    margin-bottom: 12px;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}

.vr-home-title {
    font-size: 2rem;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 6px;
}

.vr-home-tagline {
    font-size: 1rem;
    color: #94a3b8;
    font-weight: 500;
}

/* ============================
   FOOTER
   ============================ */

.vr-footer {
    background-color: #0f172a;
    border-top: 1px solid rgba(255,255,255,0.08);
    padding: 50px 0 35px 0;
    margin-top: 60px;
}

.vr-footer-inner {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding: 0 20px;
}

/* Tiny VR Monogram */
.vr-footer-logo {
    margin-bottom: 20px;
}

.vr-footer-monogram {
    width: 32px;
    height: 32px;
    opacity: 0.85;
}

/* Subscribe Section */
.vr-footer-subscribe {
    margin-bottom: 30px;
}

.vr-footer-subscribe-title {
    color: #e2e8f0;
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.vr-footer-subscribe-text {
    color: #94a3b8;
    font-size: 0.95rem;
    margin-bottom: 16px;
}

.vr-subscribe-form {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
}

.vr-subscribe-input {
    padding: 10px 14px;
    border-radius: 6px;
    border: 1px solid #334155;
    background-color: #1e293b;
    color: #e2e8f0;
    width: 260px;
    font-size: 0.95rem;
}

    .vr-subscribe-input::placeholder {
        color: #64748b;
    }

.vr-subscribe-btn {
    padding: 10px 18px;
    border-radius: 6px;
    border: none;
    background-color: #38bdf8;
    color: #0f172a;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

    .vr-subscribe-btn:hover {
        background-color: #7dd3fc;
    }

/* Footer Links */
.vr-footer-links {
    margin: 20px 0;
    font-size: 0.9rem;
}

    .vr-footer-links a {
        color: #38bdf8;
        text-decoration: none;
        margin: 0 6px;
    }

        .vr-footer-links a:hover {
            text-decoration: underline;
        }

.vr-footer-divider {
    color: #475569;
    margin: 0 4px;
}

/* Back to Top */
.vr-back-to-top {
    color: #38bdf8;
}

    .vr-back-to-top:hover {
        text-decoration: underline;
    }

/* ORCID */
.footer-orcid {
    font-size: 0.9rem;
    margin-bottom: 8px;
    opacity: 0.85;
}

    .footer-orcid a {
        color: #38bdf8;
        text-decoration: none;
    }

        .footer-orcid a:hover {
            text-decoration: underline;
        }

/* Copyright */
.footer-copy {
    color: #64748b;
    font-size: 0.85rem;
    opacity: 0.7;
}

/* ============================
   TYPOGRAPHY
   ============================ */

h1, h2, h3 {
    color: #f8fafc;
    font-weight: 600;
}

p {
    color: #e2e8f0;
    margin-bottom: 1rem;
}

/* ============================
   BUTTONS
   ============================ */

.vr-btn {
    background-color: #38bdf8;
    color: #0f172a;
    padding: 10px 18px;
    border-radius: 6px;
    font-weight: 600;
    border: none;
    cursor: pointer;
}

    .vr-btn:hover {
        background-color: #7dd3fc;
    }

/* ============================
   CONTACT FORM (Polished)
   ============================ */

.vr-contact-form {
    max-width: 720px;
    margin: 40px auto;
    padding: 36px;
    background-color: #1e293b;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.vr-form-group {
    margin-bottom: 28px;
    text-align: left;
}

    .vr-form-group label {
        display: block;
        margin-bottom: 10px;
        color: #cbd5e1;
        font-size: 1.05rem;
        font-weight: 600;
        letter-spacing: 0.2px;
    }

.vr-input,
.vr-textarea {
    width: 100%;
    padding: 12px 14px;
    border-radius: 8px;
    border: 1px solid #334155;
    background-color: #0f172a;
    color: #f1f5f9;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

    .vr-input:focus,
    .vr-textarea:focus {
        outline: none;
        border-color: #38bdf8;
    }

.vr-textarea {
    min-height: 180px;
    resize: vertical;
}

    .vr-input::placeholder,
    .vr-textarea::placeholder {
        color: #64748b;
    }

/* Success/Error Messages */
.vr-success,
.vr-error {
    margin-top: 30px;
    padding: 16px;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 500;
    background-color: #0f172a;
    border-left: 4px solid;
}

.vr-success {
    border-color: #22c55e;
    color: #bbf7d0;
}

.vr-error {
    border-color: #ef4444;
    color: #fecaca;
}

.vr-success-message {
    background: #e8f7ec;
    border: 1px solid #b6e2c1;
    color: #2d6a39;
    padding: 15px 20px;
    margin-bottom: 25px;
    border-radius: 6px;
    font-size: 16px;
}


/* ============================
   HERO, SECTIONS, CARDS
   ============================ */

.vr-hero {
    background: linear-gradient(to bottom, rgba(15,23,42,0.4), rgba(15,23,42,0.9)), url('/images/hero.webp') center/cover no-repeat;
    padding: 140px 20px 160px 20px;
    text-align: center;
    border-radius: 8px;
}

.vr-hero-title {
    font-size: 2.4rem;
    font-weight: 700;
    color: #f8fafc;
    margin-bottom: 16px;
}

.vr-hero-subtitle {
    font-size: 1.15rem;
    color: #cbd5e1;
    max-width: 700px;
    margin: 0 auto 28px auto;
}

.vr-section {
    margin: 80px auto 40px auto;
    max-width: 900px;
    text-align: center;
}

.vr-card {
    background-color: #1e293b;
    padding: 24px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.06);
    margin-bottom: 20px;
}

/* ============================
   CONTACT, VERIFY, STANDARDS, LEDGER
   ============================ */

/* General standards container */
.vr-standards {
    max-width: 900px;
    margin: 20px auto;
}

/* Contact form container */
.vr-contact-form {
    max-width: 720px;
    margin: 40px auto;
}

/* Verify form container */
.vr-verify-form {
    max-width: 500px;
    margin-top: 20px;
}

/* Verify result wrapper */
.vr-verify-result {
    margin-top: 30px;
}

/* Verify result box */
.vr-verify-box {
    background-color: #1e293b;
    padding: 20px;
    border-radius: 10px;
    border: 1px solid rgba(255,255,255,0.12);
    color: #e2e8f0;
    font-size: 1rem;
    line-height: 1.7;
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
    margin-top: 15px;
}

/* ============================
   BADGES (Valid / Invalid)
   ============================ */

.vr-badge {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.vr-valid {
    background-color: #22c55e;
    color: #0f172a;
}

.vr-invalid {
    background-color: #ef4444;
    color: #0f172a;
}

/* ============================
   COPY BUTTON
   ============================ */

.vr-copy-btn {
    margin-left: 10px;
    padding: 4px 10px;
    font-size: 0.8rem;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    background-color: #334155;
    color: #e2e8f0;
    transition: background-color 0.2s ease;
}

    .vr-copy-btn:hover {
        background-color: #475569;
    }

/* ============================
   QR CODE PLACEHOLDER
   ============================ */

.vr-qr-container {
    margin-top: 20px;
    text-align: center;
}

.vr-qr-placeholder {
    width: 140px;
    height: 140px;
    margin: 0 auto;
    border-radius: 8px;
    background-color: #0f172a;
    border: 1px solid rgba(255,255,255,0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #64748b;
    font-size: 0.85rem;
}

/* ============================
   FADE-IN ANIMATION
   ============================ */

.fade-in {
    animation: fadeIn 0.45s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================
    Terms of Use
   ============================ */
.vr-cookie-banner {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #1e293b;
    border: 1px solid rgba(255,255,255,0.12);
    padding: 16px 22px;
    border-radius: 10px;
    display: none;
    align-items: center;
    gap: 14px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.35);
    z-index: 9999;
}

    .vr-cookie-banner p {
        margin: 0;
        color: #e2e8f0;
        font-size: 0.9rem;
    }

.vr-cookie-btn {
    background-color: #38bdf8;
    color: #0f172a;
    border: none;
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
}

    .vr-cookie-btn:hover {
        background-color: #7dd3fc;
    }