/* =========================================
   Components: Buttons, Forms, Cards
   ========================================= */

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    border-radius: var(--border-radius-md);
    /* 6px as requested */
    transition: all var(--transition-normal);
    cursor: pointer;
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: 2px solid var(--color-primary);
}

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

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

.btn-outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-large {
    padding: 16px 36px;
    font-size: var(--font-size-md);
}

.btn-hero-secondary {
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.7);
    color: rgba(255, 255, 255, 0.9);
    transition: all var(--transition-normal);
}

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

/* --- Cards --- */
.card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-5);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--color-gray-100);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

/* --- Forms --- */
.form-group {
    margin-bottom: var(--spacing-4);
}

.form-label {
    display: block;
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-2);
    color: var(--color-primary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--font-size-base);
    font-family: var(--font-family-sans);
    border: 1px solid var(--color-gray-300);
    border-radius: var(--border-radius-md);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    background-color: var(--color-off-white);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 3px rgba(63, 169, 245, 0.2);
    background-color: var(--color-white);
}

/* --- Hero Section --- */
.hero {
    position: relative;
    background-color: var(--color-primary);
    /* Fallback */
    color: var(--color-white);
    padding: var(--spacing-12) 0;
    overflow: hidden;
    background-attachment: fixed !important;
    /* Static Image */
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.hero h1 {
    color: var(--color-white);
    margin-bottom: var(--spacing-4);
}

.hero .lead {
    font-size: var(--font-size-xl);
    opacity: 0.9;
    margin-bottom: var(--spacing-5);
}

/* --- Badges/Tags --- */
.badge {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--color-secondary);
    color: var(--color-white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    border-radius: var(--border-radius-xl);
    text-transform: uppercase;
}

/* --- Homepage Sections --- */
.intro-text {
    max-width: 900px;
    margin: 0 auto;
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--color-text-main);
}

/* Theme Grid */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.theme-card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--color-gray-100);
}

.theme-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.theme-icon {
    font-size: 2.5rem;
    color: var(--color-secondary);
    margin-bottom: 1rem;
}

/* Why Attend */
.why-attend-list {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}

.why-attend-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.why-attend-list li::before {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 0.2em;
    color: var(--color-secondary);
}

/* Past Conferences */
.past-conf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.past-conf-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.past-conf-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.past-conf-content {
    padding: 1.5rem;
}

/* Host University & Sustainability */
.split-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.split-content img {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
}

@media (max-width: 768px) {
    .split-section {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* --- Program/Schedule Components --- */

.program-highlight-box {
    background-color: var(--color-off-white);
    border-left: 5px solid var(--color-secondary);
    padding: 2rem;
    border-radius: var(--border-radius-md);
    margin-bottom: 3rem;
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.1rem;
    font-weight: 500;
}

.highlight-item i {
    font-size: 2rem;
    color: var(--color-secondary);
}

.program-day-section {
    margin-bottom: 4rem;
}

.program-day-header {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 1rem 2rem;
    border-radius: var(--border-radius-md);
    margin-bottom: 2rem;
    display: inline-block;
    box-shadow: var(--shadow-sm);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

/* Vertical line */
.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 170px;
    /* Shifted right */
    width: 2px;
    background: var(--color-gray-300);
}

.timeline-item {
    display: grid;
    grid-template-columns: 170px 1fr;
    /* Increased width */
    gap: 2rem;
    margin-bottom: 2rem;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 164px;
    /* Centered on the new line position */
    /* Center on the line (170px - half width) */
    top: 24px;
    width: 14px;
    height: 14px;
    background: var(--color-secondary);
    border-radius: 50%;
    border: 3px solid var(--color-white);
    box-shadow: 0 0 0 1px var(--color-gray-300);
    z-index: 2;
}

.time-slot {
    font-family: var(--font-family-heading);
    font-weight: 700;
    color: var(--color-primary);
    text-align: right;
    padding-top: 1rem;
    padding-right: 20px;
    /* Ensure gap from line */
    font-size: 1.1rem;
}

.event-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-100);
    border-radius: var(--border-radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-fast);
}

.event-card:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
    border-left: 3px solid var(--color-secondary);
}

.event-title {
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.event-speaker {
    color: var(--color-text-main);
    font-style: italic;
    margin-bottom: 0.5rem;
}

.badge-free {
    background-color: #28a745;
    /* Green */
    color: white;
}

.badge-paid {
    background-color: #dc3545;
    /* Red */
    color: white;
}

@media (max-width: 768px) {
    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding-left: 40px;
    }

    .timeline-item::before {
        left: 14px;
        top: 24px;
    }

    .time-slot {
        text-align: left;
        padding-top: 0;
        margin-bottom: 0.5rem;
    }
}

/* --- Invitation Page --- */
.invitation-hero {
    background-image: linear-gradient(rgba(0, 31, 63, 0.4), rgba(0, 31, 63, 0.4)), url('../assets/images/invitation_header.jpg');
    background-size: cover;
    background-position: center 20%;
    /* Shift focus up to capture signage */
    color: var(--color-white);
    padding: 6rem 0;
    text-align: center;
    position: relative;
    /* Ensure text is above overlay if needed, though gradient handles it */
}

.invitation-hero h1 {
    color: var(--color-white);
    font-size: 3rem;
    text-transform: uppercase;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    margin: 0;
}

.dates-table {
    width: 100%;
    max-width: 800px;
    margin: 2rem auto;
    border-collapse: collapse;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    border-radius: var(--border-radius-md);
    overflow: hidden;
}

.dates-table th,
.dates-table td {
    padding: 1rem 1.5rem;
    text-align: left;
    border-bottom: 1px solid var(--color-gray-100);
}

.dates-table th {
    background-color: var(--color-off-white);
    color: var(--color-primary);
    font-weight: 600;
    width: 40%;
}

.dates-table tr:last-child td,
.dates-table tr:last-child th {
    border-bottom: none;
}

.theme-list {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
}

/* --- Scientific Board Page --- */
.board-section {
    margin-bottom: 4rem;
}

.board-header {
    border-bottom: 2px solid var(--color-gray-100);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
    color: var(--color-primary);
}

.honorary-card {
    background-color: var(--color-off-white);
    border-left: 5px solid var(--color-secondary);
    padding: 1.5rem;
    border-radius: var(--border-radius-sm);
    display: inline-block;
    min-width: 300px;
}

.board-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.board-member-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-100);
    border-radius: var(--border-radius-sm);
    padding: 1.5rem;
    transition: all var(--transition-fast);
}

.board-member-card:hover {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-sm);
}

.member-name {
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
    font-size: 1.05rem;
}

.member-role {
    font-size: 0.9em;
    color: var(--color-secondary);
    font-weight: 600;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    display: block;
}

.member-institution {
    font-size: 0.95rem;
    color: var(--color-text-main);
}

.committee-list {
    list-style: none;
}

.committee-item {
    padding: 1rem;
    border-bottom: 1px solid var(--color-gray-100);
    display: flex;
    flex-direction: column;
}

.committee-item:last-child {
    border-bottom: none;
}

/* --- Rome 2024 Page --- */
.proceedings-card {
    display: inline-flex;
    align-items: center;
    background-color: var(--color-off-white);
    border: 2px solid var(--color-primary);
    padding: 1.5rem 2rem;
    border-radius: var(--border-radius-md);
    color: var(--color-primary);
    font-weight: 700;
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    gap: 1rem;
}

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

.proceedings-card i {
    font-size: 1.5rem;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.gallery-item {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-normal);
}

.gallery-item:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

@media (max-width: 900px) {
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .gallery-grid {
        grid-template-columns: 1fr;
    }

    .gallery-item {
        height: 250px;
    }
}