/* ============================================================
   LabSci Portal — Global Stylesheet
   Professional Light Theme for Medical Technology
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Outfit:wght@400;500;600;700;800&display=swap');

/* ── Design Tokens ───────────────────────────────────────── */
:root {
    /* Overridden dynamically by PHP build_css_vars() */
    --color-primary:       #1A5CA8;
    --color-secondary:     #0E9080;
    --color-accent:        #E8F0FB;
    --font-heading:        'Outfit', system-ui, sans-serif;
    --font-body:           'Inter', system-ui, sans-serif;

    /* Fixed palette */
    --color-primary-dark:  #0F3D73;
    --color-primary-mid:   #2470C8;
    --color-primary-light: #D6E7F8;
    --color-secondary-dark:#096B5F;
    --color-secondary-light:#D0F0EB;
    --color-gold:          #C8882A;
    --color-gold-light:    #FDF3E3;

    /* Neutrals */
    --color-bg:            #F4F7FC;
    --color-surface:       #FFFFFF;
    --color-surface-2:     #F0F4FA;
    --color-border:        #D8E4F2;
    --color-border-2:      #C2D4E8;

    /* Text */
    --color-text:          #0F1D2E;
    --color-text-2:        #3A5068;
    --color-text-3:        #7090A8;
    --color-text-invert:   #FFFFFF;

    /* Status */
    --color-success:       #1A7A4A;
    --color-success-bg:    #E6F5EC;
    --color-warning:       #8C5A00;
    --color-warning-bg:    #FFF7E0;
    --color-danger:        #B52828;
    --color-danger-bg:     #FDEAEA;
    --color-info:          #1558A8;
    --color-info-bg:       #E5EFFA;

    /* Structure */
    --radius-sm:    6px;
    --radius:       10px;
    --radius-lg:    16px;
    --radius-xl:    24px;
    --radius-full:  999px;

    --shadow-sm:    0 1px 3px rgba(15,29,46,0.08);
    --shadow:       0 4px 16px rgba(15,29,46,0.10);
    --shadow-md:    0 8px 30px rgba(15,29,46,0.12);
    --shadow-lg:    0 16px 50px rgba(15,29,46,0.14);

    --nav-height:   68px;
    --transition:   0.2s ease;
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover { color: var(--color-primary-dark); }

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

ul, ol { list-style: none; }

/* ── Typography ──────────────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text);
    font-weight: 700;
    line-height: 1.25;
}
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.15rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.9rem; }

p { color: var(--color-text-2); margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

.lead {
    font-size: 1.125rem;
    color: var(--color-text-2);
    line-height: 1.75;
}

/* ── Navigation ──────────────────────────────────────────── */
.site-nav {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    height: var(--nav-height);
    position: sticky;
    top: 0;
    z-index: 900;
    box-shadow: 0 2px 8px rgba(15,29,46,0.06);
}

.nav-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}

.nav-logo-icon {
    width: 42px;
    height: 42px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-mid) 100%);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(26,92,168,0.30);
    flex-shrink: 0;
    overflow: hidden;
}

.nav-logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.nav-logo-icon svg {
    width: 24px;
    height: 24px;
    fill: none;
    stroke: white;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.nav-logo-text {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
}

.nav-logo-text span { color: var(--color-primary); }

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    flex: 1;
    justify-content: center;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-2);
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.nav-dropdown {
    position: relative;
}

.nav-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    min-width: 240px;
    padding: 8px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: all 0.15s ease;
    z-index: 100;
}

.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 0.875rem;
    transition: background var(--transition);
}

.dropdown-item:hover {
    background: var(--color-accent);
    color: var(--color-primary);
}

.dropdown-item-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.dropdown-item-icon svg {
    width: 18px;
    height: 18px;
    fill: none;
    stroke: currentColor;
    stroke-width: 1.8;
    stroke-linecap: round;
}

.dropdown-item-text strong {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
}

.dropdown-item-text small {
    color: var(--color-text-3);
    font-size: 0.75rem;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

/* Mobile nav toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 6px;
    border: none;
    background: none;
}
.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all 0.25s;
    display: block;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 22px;
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    border: 1.5px solid transparent;
    transition: all var(--transition);
    text-decoration: none;
    white-space: nowrap;
    letter-spacing: 0.01em;
}

.btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}
.btn-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(26,92,168,0.35);
}

.btn-secondary {
    background: var(--color-secondary);
    color: white;
    border-color: var(--color-secondary);
}
.btn-secondary:hover {
    background: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(14,144,128,0.35);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary-light);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-2);
    border-color: var(--color-border);
}
.btn-ghost:hover {
    background: var(--color-surface-2);
    color: var(--color-text);
}

.btn-sm {
    padding: 7px 14px;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 14px 30px;
    font-size: 1rem;
}

.btn-full { width: 100%; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.card-header {
    margin-bottom: 1.25rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.card-header h3 {
    font-size: 1.05rem;
    font-weight: 700;
}

/* ── Section Layout ──────────────────────────────────────── */
.section {
    padding: 5rem 0;
}

.section-sm {
    padding: 3rem 0;
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 2rem;
}

.container-sm {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.section-label::before,
.section-label::after {
    content: '';
    width: 24px;
    height: 1.5px;
    background: var(--color-primary);
    opacity: 0.5;
}

.section-heading {
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 800;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-sub {
    font-size: 1.05rem;
    color: var(--color-text-2);
    max-width: 580px;
    line-height: 1.7;
}

/* ── Badge ───────────────────────────────────────────────── */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    border: 1.5px solid;
}

.badge-primary {
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-color: #A8C8F0;
}

.badge-secondary {
    background: var(--color-secondary-light);
    color: var(--color-secondary-dark);
    border-color: #8ED4CC;
}

.badge-success {
    background: var(--color-success-bg);
    color: var(--color-success);
    border-color: #9ADABC;
}

.badge-gold {
    background: var(--color-gold-light);
    color: var(--color-gold);
    border-color: #E8C080;
}

/* ── App Cards (LabVision / LabVerse / TestFlow) ────────── */
.app-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
}

.app-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.app-card-visual {
    height: 160px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.app-card-body {
    padding: 1.5rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.app-card-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    flex-shrink: 0;
}

.app-card-icon svg {
    width: 28px;
    height: 28px;
    fill: none;
    stroke: white;
    stroke-width: 1.8;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.app-card-title {
    font-size: 1.2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.app-card-desc {
    font-size: 0.875rem;
    color: var(--color-text-2);
    line-height: 1.65;
    flex: 1;
    margin-bottom: 1.25rem;
}

.app-card-tag {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--color-text-3);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

/* ── Forms ───────────────────────────────────────────────── */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius);
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text);
    background: var(--color-surface);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
    appearance: none;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(26,92,168,0.12);
}

.form-control::placeholder { color: var(--color-text-3); }

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

select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%237090A8' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
    cursor: pointer;
}

.form-hint {
    font-size: 0.78rem;
    color: var(--color-text-3);
    margin-top: 4px;
}

.form-error {
    font-size: 0.78rem;
    color: var(--color-danger);
    margin-top: 4px;
}

/* ── Alerts ──────────────────────────────────────────────── */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    font-size: 0.875rem;
    border: 1px solid;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.alert svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
}

.alert-success { background: var(--color-success-bg); color: var(--color-success); border-color: #9ADABC; }
.alert-danger   { background: var(--color-danger-bg); color: var(--color-danger); border-color: #F0ACAC; }
.alert-warning  { background: var(--color-warning-bg); color: var(--color-warning); border-color: #E8C080; }
.alert-info     { background: var(--color-info-bg); color: var(--color-info); border-color: #A8C8F0; }

/* ── Divider ──────────────────────────────────────────────── */
.divider {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 2rem 0;
}

/* ── Tags ────────────────────────────────────────────────── */
.tag {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    background: var(--color-surface-2);
    color: var(--color-text-2);
    border: 1px solid var(--color-border);
}

/* ── Grid Helpers ────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* ── Footer ──────────────────────────────────────────────── */
.site-footer {
    background: var(--color-text);
    color: rgba(255,255,255,0.7);
    padding: 4rem 0 2rem;
    margin-top: auto;
}

.footer-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand-text {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 800;
    color: white;
    margin-bottom: 0.75rem;
}

.footer-brand-text span { color: #6DB0F0; }

.footer-tagline {
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.footer-heading {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: white;
    margin-bottom: 1rem;
}

.footer-links li { margin-bottom: 0.5rem; }
.footer-links a {
    color: rgba(255,255,255,0.6);
    font-size: 0.875rem;
    transition: color var(--transition);
}
.footer-links a:hover { color: white; }

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.12);
    padding-top: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom-text {
    font-size: 0.8rem;
    color: rgba(255,255,255,0.45);
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 1024px) {
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .nav-links, .nav-cta { display: none; }
    .nav-toggle { display: flex; }

    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-surface);
        padding: 1.5rem;
        gap: 0.25rem;
        overflow-y: auto;
        z-index: 899;
    }

    .nav-dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        border-left: 2px solid var(--color-border);
        border-radius: 0;
        background: var(--color-surface-2);
        padding: 8px 0 8px 12px;
        margin-top: 4px;
    }

    .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
    .footer-bottom { flex-direction: column; text-align: center; }

    .section { padding: 3.5rem 0; }
    .container, .container-sm { padding: 0 1.25rem; }
}