/**
 * ============================================================================
 * PROTEOBASE - Redirect Banner Stylesheet
 * ============================================================================
 *
 * A secure, open, public repository for proteomics data.
 * Stewarded by EuropaDX, Inc.
 *
 * ============================================================================
 */


/* ============================================================================
   1. CSS VARIABLES (Custom Properties)
   ============================================================================ */

:root {
    /* Primary Colors */
    --color-primary: #0D5C8F;
    --color-primary-dark: #094a73;

    /* Secondary Colors */
    --color-secondary-dark: #168D9D;
    --color-teal: #1EBCD1;

    /* Neutral Colors */
    --color-dark: #03045E;
    --color-gray-700: #374151;
    --color-gray-500: #6B7280;
    --color-gray-300: #D1D5DB;
    --color-gray-100: #F3F4F6;
    --color-white: #FFFFFF;
    --color-bg-light: #F9FAFB;
    --color-divider: rgba(0, 0, 0, .12);

    /* Typography */
    --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;

    --font-size-sm: 1rem;
    --font-size-base: 1.125rem;
    --font-size-lg: 1.25rem;
    --font-size-2xl: 1.625rem;
    --font-size-3xl: 2rem;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border Radius */
    --radius-md: 8px;

    /* Shadows */
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;

    /* Layout */
    --container-max-width: 1200px;
    --container-padding: 1.5rem;
}


/* ============================================================================
   2. RESET & BASE STYLES
   ============================================================================ */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-size-base);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-gray-700);
    background: var(--color-gray-100);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}


/* ============================================================================
   3. TYPOGRAPHY
   ============================================================================ */

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-dark);
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }

p {
    margin-bottom: var(--spacing-sm);
}

p:last-child {
    margin-bottom: 0;
}

strong {
    font-weight: 600;
    color: var(--color-dark);
}


/* ============================================================================
   4. LAYOUT & CONTAINER
   ============================================================================ */

.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}


/* ============================================================================
   5. BUTTONS
   ============================================================================ */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85rem 1.6rem;
    border-radius: 10px;
    border: 2px solid transparent;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-base);
    font-family: var(--font-body);
}

.btn:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.btn--primary {
    background: var(--color-teal);
    color: var(--color-white);
    border-color: var(--color-teal);
}

.btn--primary:hover {
    background: var(--color-secondary-dark);
    border-color: var(--color-secondary-dark);
    color: var(--color-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn--large {
    font-size: var(--font-size-lg);
    min-width: 260px;
}


.banner-section {
    padding: var(--spacing-3xl) 0;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.banner-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 0;
    margin: 0 auto;
    text-align: center;
    border: 1px solid var(--color-gray-300);
    overflow: hidden;
    max-width: 1050px;
}

.banner-card__header {
    display: flex;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-2xl);
    border-bottom: 1px solid var(--color-gray-300);
}

.banner-card__body {
    padding: var(--spacing-xl) var(--spacing-2xl);
    text-align: center;
}

.banner-card__image {
    max-width: 520px;
}

.banner-card__title {
    font-size: var(--font-size-3xl);
    color: var(--color-primary);
    margin-bottom: var(--spacing-sm);
    font-weight: 700;
}

.banner-card__subtitle {
    font-size: 1.05rem;
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-xl);
}

.cards-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: stretch;
    margin-top: var(--spacing-lg);
}

.info-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
    text-align: left;

    display: flex;
    flex-direction: column;
}

.info-card__content {
    flex: 1 1 auto;
}

.info-card .cta-divider {
    margin-top: 0;
}

.info-card__footer {
    min-height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.info-card--emphasis {
    background: #F8FBFF;
    border-color: #cfe4f5;
}

.info-card__title {
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
}

.info-card__text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-lg);
}

.checklist {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.checklist li {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
}

.checklist__icon {
    width: 18px;
    height: 18px;
    margin-top: 2px;
}

.cta-divider {
    position: relative;
    margin: var(--spacing-xl) 0 var(--spacing-md);
    display: flex;
    justify-content: center;
}

.cta-divider__line {
    height: 1px;
    width: 100%;
    background: var(--color-gray-300);
    position: absolute;
    top: 50%;
    left: 0;
}

.cta-divider__content {
    position: relative;
    background: var(--color-white);
    padding: 0;
    z-index: 2;
    display: inline-flex;
}

.btn--secondary {
    background: var(--color-white);
    border-color: var(--color-gray-300);
    color: var(--color-gray-700);
    font-weight: 700;
}

.btn--secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.btn--wide {
    width: 100%;
    padding: 0.9rem 1rem;
}

.secure-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.secure-row__icon {
    width: 24px;
    height: 24px;
}

.secure-row__text {
    color: var(--color-gray-500);
    font-size: var(--font-size-sm);
    font-style: italic;
}

.note {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--color-gray-500);
    text-align: center;
}

.redirecting {
    margin-top: var(--spacing-md);
    font-size: 0.95rem;
    color: var(--color-gray-500);
    text-align: center;
}

.link-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.link-list__item {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-primary);
}

.link-list__item:hover {
    color: var(--color-primary-dark);
}

.arrow {
    font-weight: 800;
    color: var(--color-primary);
}

.hint {
    margin-top: var(--spacing-lg);
    font-size: 0.95rem;
    color: var(--color-gray-500);
    text-align: center;
}

.banner-card__footer {
    background: var(--color-gray-100);
    border-top: 1px solid var(--color-gray-300);
    padding: var(--spacing-lg) var(--spacing-xl);
    text-align: center;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    font-size: var(--font-size-sm);
}

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

.separator {
    color: var(--color-gray-500);
}

.footer-caption {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--color-gray-500);
}

/* Responsive */
@media (max-width: 900px) {
    .cards-grid {
        grid-template-columns: 1fr;
    }

    .banner-card__body {
        padding: var(--spacing-xl) var(--spacing-lg);
    }

    .banner-card__header {
        padding: var(--spacing-xl) var(--spacing-lg);
    }
}