/* BioXR Public Site — Components */

/* ── Buttons ── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-family: var(--font-sans);
    font-weight: 500;
    font-size: var(--text-base);
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-md);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--duration-normal) var(--ease-out);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-accent);
    color: var(--color-white);
    border-color: transparent;
    box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(59, 130, 246, 0.4);
    color: var(--color-white);
}

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
    color: var(--color-white);
}

.btn-lg {
    font-size: var(--text-lg);
    padding: 0.875rem 2rem;
    border-radius: var(--radius-lg);
}

.btn-full {
    width: 100%;
}

/* ── Navigation ── */
.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--nav-height);
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: background var(--duration-normal) ease;
}

.site-nav.scrolled {
    background: rgba(10, 14, 39, 0.95);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.nav-logo-img {
    height: 36px;
    width: auto;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-links a {
    color: var(--color-gray-300);
    font-size: var(--text-sm);
    font-weight: 500;
    transition: color var(--duration-fast) ease;
}

.nav-links a:hover {
    color: var(--color-white);
}

.nav-cta {
    background: var(--gradient-accent);
    color: var(--color-white) !important;
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 500;
}

.nav-cta:hover {
    opacity: 0.9;
}

/* Secondary nav button — outlined, sits next to the primary .nav-cta */
.nav-cta-outline {
    padding: 0.45rem 1rem;
    border-radius: var(--radius-md);
    border: 1px solid rgba(148, 163, 184, 0.4);
    font-weight: 500;
    transition: border-color var(--duration-fast) ease, background var(--duration-fast) ease;
}

.nav-cta-outline:hover {
    border-color: rgba(148, 163, 184, 0.7);
    background: rgba(148, 163, 184, 0.08);
}

/* ── Nav Solutions dropdown ── */
.nav-dropdown {
    position: relative;
}

.nav-dropdown-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.3em;
    cursor: pointer;
}

.nav-dropdown-arrow {
    font-size: 0.7em;
    transition: transform var(--duration-fast) ease;
    opacity: 0.7;
}

.nav-dropdown:hover .nav-dropdown-arrow,
.nav-dropdown:focus-within .nav-dropdown-arrow {
    transform: rotate(180deg);
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    left: -8px;
    min-width: 240px;
    background: rgba(10, 14, 39, 0.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--duration-fast) ease, transform var(--duration-fast) ease, visibility 0s linear var(--duration-fast);
    box-shadow: var(--shadow-lg);
}

.nav-dropdown:hover .nav-dropdown-menu,
.nav-dropdown:focus-within .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity var(--duration-fast) ease, transform var(--duration-fast) ease, visibility 0s;
}

.nav-dropdown-menu li {
    display: block;
}

.nav-dropdown-menu a {
    display: block;
    padding: 0.55rem 0.875rem;
    border-radius: var(--radius-sm);
    color: var(--color-gray-300) !important;
    font-size: var(--text-sm);
    white-space: nowrap;
}

.nav-dropdown-menu a:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--color-white) !important;
}

@media (max-width: 768px) {
    .nav-dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: transparent;
        border: none;
        box-shadow: none;
        padding: var(--space-md) 0 0 var(--space-md);
        min-width: 0;
        backdrop-filter: none;
    }
    .nav-dropdown-arrow { display: none; }
    .nav-dropdown-menu a { font-size: var(--text-lg); padding: 0.4rem 0; }
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    flex-direction: column;
    gap: 5px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: all var(--duration-fast) ease;
    border-radius: 1px;
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-navy);
        flex-direction: column;
        padding: var(--space-3xl) var(--space-xl);
        gap: var(--space-2xl);
        transform: translateX(100%);
        transition: transform var(--duration-normal) var(--ease-out);
    }

    .nav-links.open {
        transform: translateX(0);
    }

    .nav-links a {
        font-size: var(--text-xl);
    }
}

/* ── Cards ── */
.use-case-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    transition: all var(--duration-normal) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.use-case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--duration-normal) var(--ease-out);
}

.use-case-card:hover {
    border-color: var(--color-blue);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    transform: translateY(-4px);
}

.use-case-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    width: 48px;
    height: 48px;
    color: var(--color-blue);
    margin-bottom: var(--space-lg);
}

.use-case-card h3 {
    margin-bottom: var(--space-md);
    font-size: var(--text-xl);
}

.use-case-card p {
    font-size: var(--text-sm);
    line-height: var(--line-normal);
    margin-bottom: var(--space-lg);
}

.card-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.card-features li {
    font-size: var(--text-sm);
    color: var(--color-gray-600);
    padding-left: 1.25rem;
    position: relative;
}

.card-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.5em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--gradient-accent);
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

@media (max-width: 720px) {
    .use-case-grid {
        grid-template-columns: 1fr;
        max-width: 560px;
        margin: 0 auto;
    }
}

/* ── Form Controls ── */
.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-gray-700);
    margin-bottom: var(--space-xs);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-size: var(--text-base);
    color: var(--color-gray-800);
    background: var(--color-white);
    border: 1.5px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-gray-400);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.form-status {
    margin-top: var(--space-md);
    font-size: var(--text-sm);
    text-align: center;
    min-height: 1.5em;
}

.form-status.success {
    color: var(--color-green);
}

.form-status.error {
    color: #ef4444;
}