/* ============================================
   HOMEPAGE STYLES - MODERN CLEAN DESIGN
   Mobile-first, Performance-optimized
   ============================================ */

/* CSS Custom Properties */
:root {
    /* Primary Colors */
    --color-primary: #0066cc;
    --color-primary-dark: #004a99;
    --color-primary-light: #3385d6;
    --color-primary-hover: #0052a3;
    
    /* Secondary Colors */
    --color-secondary: #1e4d7b;
    --color-accent: #00a8cc;
    --color-success: #059669;
    
    /* Neutrals */
    --color-text: #0f172a;
    --color-text-secondary: #334155;
    --color-text-muted: #64748b;
    --color-bg: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    
    /* Hero Button Colors */
    --hero-btn-primary-bg: #ffffff;
    --hero-btn-primary-text: #0066cc;
    --hero-btn-primary-hover-bg: #f0f7ff;
    --hero-btn-primary-hover-text: #004a99;
    
    --hero-btn-secondary-bg: rgba(255, 255, 255, 0.15);
    --hero-btn-secondary-text: #ffffff;
    --hero-btn-secondary-border: rgba(255, 255, 255, 0.5);
    --hero-btn-secondary-hover-bg: rgba(255, 255, 255, 0.25);
    --hero-btn-secondary-hover-border: rgba(255, 255, 255, 0.8);
    
    /* Typography */
    --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'BPG Nino', 'Helvetica Neue', sans-serif;
    --font-heading: 'BPG Nino', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Spacing */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    
    /* Layout */
    --container-max: 1280px;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 16px;
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 450ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Styles */
.vascular-homepage * {
    box-sizing: border-box;
}

.vascular-homepage {
    font-family: var(--font-base);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Container */
.vascular-homepage .container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.25rem;
}

@media (min-width: 640px) {
    .vascular-homepage .container {
        padding: 0 2rem;
    }
}

@media (min-width: 1024px) {
    .vascular-homepage .container {
        padding: 0 3rem;
    }
}

/* Section Titles */
.section-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    margin: 0 0 2.5rem 0;
    color: var(--color-text);
    text-align: center;
    line-height: 1.2;
    letter-spacing: -0.025em;
}

@media (min-width: 768px) {
    .section-title {
        font-size: 2.5rem;
        margin-bottom: 3.5rem;
    }
}

@media (min-width: 1024px) {
    .section-title {
        font-size: 2.75rem;
        margin-bottom: 4rem;
    }
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero-section {
    position: relative;
    background: linear-gradient(135deg, #0066cc 0%, #004a99 50%, #1e4d7b 100%);
    padding: 3.5rem 0 4.5rem;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

@media (min-width: 768px) {
    .hero-section {
        padding: 5rem 0 6rem;
    }
}

@media (min-width: 1024px) {
    .hero-section {
        padding: 6rem 0 7rem;
    }
}

.hero-section .container {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 1.875rem;
    line-height: 1.2;
    font-weight: 700;
    margin: 0 0 1.5rem 0;
    color: white;
    letter-spacing: -0.025em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

@media (min-width: 640px) {
    .hero-title {
        font-size: 2.25rem;
    }
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 2.75rem;
        margin-bottom: 1.75rem;
    }
}

@media (min-width: 1024px) {
    .hero-title {
        font-size: 3.25rem;
        margin-bottom: 2rem;
    }
}

.hero-mission {
    font-size: 1.0625rem;
    line-height: 1.7;
    margin: 0 auto 2.25rem;
    color: rgba(255, 255, 255, 0.95);
    max-width: 720px;
    font-weight: 400;
}

@media (min-width: 768px) {
    .hero-mission {
        font-size: 1.25rem;
        margin-bottom: 2.75rem;
    }
}

@media (min-width: 1024px) {
    .hero-mission {
        font-size: 1.375rem;
    }
}

.hero-ctas {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    justify-content: center;
}

@media (min-width: 640px) {
    .hero-ctas {
        flex-direction: row;
        gap: 1.25rem;
    }
}

/* ============================================
   BUTTON SYSTEM
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9375rem 2.25rem;
    font-size: 1.0625rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    border: 2px solid transparent;
    cursor: pointer;
    text-align: center;
    min-height: 50px;
    line-height: 1.2;
    letter-spacing: -0.01em;
    white-space: nowrap;
}

@media (min-width: 640px) {
    .btn {
        padding: 1rem 2.5rem;
        font-size: 1.125rem;
    }
}

/* Primary Button */
.btn-primary {
    background: var(--hero-btn-primary-bg);
    color: var(--hero-btn-primary-text);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    background: var(--hero-btn-primary-hover-bg);
    color: var(--hero-btn-primary-hover-text);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* Secondary Button */
.btn-secondary {
    background: var(--hero-btn-secondary-bg);
    color: var(--hero-btn-secondary-text);
    border-color: var(--hero-btn-secondary-border);
    backdrop-filter: blur(8px);
}

.btn-secondary:hover {
    background: var(--hero-btn-secondary-hover-bg);
    border-color: var(--hero-btn-secondary-hover-border);
    color: #ffffff;
    transform: translateY(-2px);
}

/* Outline Button */
.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

/* ============================================
   CONFERENCES SECTION - LANDSCAPE CARDS
   ============================================ */
.conferences-section {
    padding: 3.5rem 0;
    background: var(--color-bg-secondary);
}

@media (min-width: 768px) {
    .conferences-section {
        padding: 5rem 0;
    }
}

@media (min-width: 1024px) {
    .conferences-section {
        padding: 6rem 0;
    }
}

.conferences-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
    margin-bottom: 3rem;
}

@media (min-width: 640px) {
    .conferences-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2rem;
    }
}

@media (min-width: 1024px) {
    .conferences-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2rem;
    }
}

/* Conference Card - Landscape Orientation */
.conference-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.35s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
}

.conference-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--radius-lg);
    box-shadow: 0 12px 40px rgba(0, 102, 204, 0.15);
    opacity: 0;
    transition: opacity 0.35s ease;
    pointer-events: none;
}

.conference-card:hover {
    transform: translateY(-3px);
}

.conference-card:hover::after {
    opacity: 1;
}

/* Featured Conference Subtle Highlight */
.conference-card-featured {
    box-shadow: 0 4px 16px rgba(0, 102, 204, 0.1);
}

.conference-card-link {
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Conference Image - LANDSCAPE (Wider & Shorter) */
.conference-card-image {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    flex-shrink: 0;
}

@media (min-width: 640px) {
    .conference-card-image {
        height: 220px;
    }
}

@media (min-width: 768px) {
    .conference-card-image {
        height: 240px;
    }
}

@media (min-width: 1024px) {
    .conference-card-image {
        height: 250px;
    }
}

.conference-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.conference-card:hover .conference-img {
    transform: scale(1.04);
}

.conference-img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

/* Date Overlay Badge - Minimal Movement */
.conference-date-overlay {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    text-align: center;
    min-width: 70px;
    transition: all 0.3s ease;
}

.conference-card:hover .conference-date-overlay {
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
}

.date-day {
    display: block;
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.date-month {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-top: 0.25rem;
}

/* Conference Card Body */
.conference-card-body {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    background: white;
}

@media (min-width: 1024px) {
    .conference-card-body {
        padding: 2rem;
    }
}

.conference-location {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    font-weight: 500;
    padding: 0.375rem 0.75rem;
    background: rgba(0, 102, 204, 0.06);
    border-radius: var(--radius-sm);
    width: fit-content;
    transition: all 0.25s ease;
}

.conference-card:hover .conference-location {
    background: rgba(0, 102, 204, 0.1);
}

.conference-location svg {
    flex-shrink: 0;
}

/* Title - Stays Same Color */
.conference-card-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 0.875rem 0;
    color: var(--color-text);
    line-height: 1.3;
    transition: none;
}

@media (min-width: 1024px) {
    .conference-card-title {
        font-size: 1.375rem;
    }
}

.conference-card-excerpt {
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: auto;
    padding-bottom: 1.25rem;
}

/* Conference Card Footer - Minimal Animation */
.conference-card-footer {
    padding-top: 1rem;
    border-top: 2px solid var(--color-bg-secondary);
    margin-top: auto;
    transition: border-color 0.25s ease;
}

.conference-card:hover .conference-card-footer {
    border-top-color: rgba(0, 102, 204, 0.1);
}

/* Registration Link - Only Arrow Moves */
.conference-register-link {
    display: inline-flex;
    align-items: center;
    gap: 0.625rem;
    color: var(--color-primary);
    font-weight: 600;
    font-size: 1rem;
    transition: gap 0.25s ease;
    padding: 0.5rem 0;
}

.conference-register-link svg {
    transition: transform 0.25s ease;
}

.conference-card:hover .conference-register-link {
    gap: 0.75rem;
}

.conference-card:hover .conference-register-link svg {
    transform: translateX(4px);
}

/* Featured Conference */
.conference-card-featured .conference-register-link {
    font-weight: 700;
}

/* No Conferences State */
.no-conferences {
    grid-column: 1 / -1;
    text-align: center;
    padding: 5rem 2rem;
    background: white;
    border-radius: var(--radius-lg);
    border: 2px dashed var(--color-border);
}

.no-conferences-icon {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: center;
    opacity: 0.5;
}

.no-conferences h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.75rem 0;
}

.no-conferences p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin: 0;
}

/* View All Wrapper */
.view-all-wrapper {
    text-align: center;
}

/* ============================================
   ANNOUNCEMENTS SECTION
   ============================================ */
.announcements-section {
    padding: 3.5rem 0;
    background: white;
}

@media (min-width: 768px) {
    .announcements-section {
        padding: 5rem 0;
    }
}

@media (min-width: 1024px) {
    .announcements-section {
        padding: 6rem 0;
    }
}

.announcements-grid {
    display: grid;
    gap: 2rem;
    grid-template-columns: 1fr;
    margin-bottom: 3rem;
}

@media (min-width: 640px) {
    .announcements-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 2.5rem;
    }
}

@media (min-width: 1024px) {
    .announcements-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 2.5rem;
    }
}

.announcement-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition-base);
    display: flex;
    flex-direction: column;
}

.announcement-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-border);
}

.announcement-thumbnail {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--color-bg-secondary);
}

.announcement-thumbnail a {
    display: block;
    width: 100%;
    height: 100%;
}

.announcement-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.announcement-card:hover .announcement-img {
    transform: scale(1.05);
}

.announcement-body {
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

@media (min-width: 1024px) {
    .announcement-body {
        padding: 2rem;
    }
}

.announcement-date {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
    display: inline-block;
}

.announcement-title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 1rem 0;
    line-height: 1.3;
}

@media (min-width: 1024px) {
    .announcement-title {
        font-size: 1.375rem;
    }
}

.announcement-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: color var(--transition-base);
}

.announcement-title a:hover {
    color: var(--color-primary);
}

.announcement-excerpt {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: auto;
    padding-bottom: 1.5rem;
}

.announcement-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.announcement-link svg {
    transition: transform var(--transition-base);
}

.announcement-link:hover {
    color: var(--color-primary-dark);
    gap: 0.75rem;
}

.announcement-link:hover svg {
    transform: translateX(3px);
}

.no-posts {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--color-text-muted);
    font-size: 1.125rem;
    padding: 3rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--color-border);
}

/* ============================================
   ACCESSIBILITY & UX
   ============================================ */

/* Touch targets */
@media (max-width: 767px) {
    a, button, .btn {
        min-height: 48px;
    }
}

/* Touch feedback */
a, button, .btn {
    -webkit-tap-highlight-color: rgba(0, 102, 204, 0.1);
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus states */
a:focus-visible, 
button:focus-visible, 
.btn:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}

/* Selection */
::selection {
    background-color: var(--color-primary);
    color: white;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}