:root {
    --conference-primary: #c81d23;
    --conference-secondary: #2f7fb7;
    --conference-light: #eef5fa;
    --conference-dark: #123451;
    --conference-accent: #d6a84f;
}

body {
    font-family: "Segoe UI", Arial, sans-serif;
    color: #263746;
    background: #fff;
}

.conference-hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    background:
        linear-gradient(rgba(18, 52, 81, .72), rgba(18, 52, 81, .72)),
        /* linear-gradient(rgba(211, 110, 110, 0.72), rgba(211, 110, 110, 0.72)), */
        url("images/konferencija-banner.jpg") center/cover no-repeat;
}

.hero-content {
    max-width: 800px;
    color: #fff;
    padding: 70px 0;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    margin: 15px 0;
}

.hero-content .lead {
    font-size: 1.2rem;
    line-height: 1.7;
    margin-bottom: 30px;
}

.conference-label {
    display: inline-block;
    font-size: .8rem;
    letter-spacing: 2px;
    font-weight: 700;
    color: var(--conference-accent);
}

.conference-label.dark {
    color: var(--conference-secondary);
}

.btn-primary {
    background-color: var(--conference-secondary);
    border-color: var(--conference-secondary);
}

.btn-primary:hover {
    background-color: var(--conference-dark);
    border-color: var(--conference-dark);
}

.section-title span {
    color: var(--conference-secondary);
    font-size: .8rem;
    letter-spacing: 2px;
    font-weight: 700;
}

.section-title h2 {
    font-weight: 800;
    color: var(--conference-dark);
    margin-top: 8px;
}

.section-title p {
    color: #687985;
}

.info-card,
.date-card {
    border-radius: 18px;
    padding: 35px;
    box-shadow: 0 12px 35px rgba(184, 3, 3, 0.08);
}

.info-card {
    border: 1px solid #e2ebf1;
}

.info-card h3,
.date-card h3 {
    color: var(--conference-dark);
    font-weight: 750;
    margin-bottom: 20px;
}

/* .date-card table {
    color: var(--conference-dark);
    font-weight: 750;
    margin-bottom: 20px;
} */

.info-card p {
    line-height: 1.8;
    color: #586b79;
}

.date-card {
    color: #fff;
    background: linear-gradient(135deg, var(--conference-primary), var(--conference-primary));
}

.date-card h3 {
    color: #fff;
}

/* Pricing table inside the red date card */
.date-card .table {
    --bs-table-bg: transparent;
    --bs-table-color: #fff;
    --bs-table-border-color: rgba(255, 255, 255, .95);
    color: #fff;
    background: transparent;
    margin: 22px 0 16px;
    border-collapse: collapse;
}

.date-card .table > :not(caption) > * > * {
    background-color: transparent !important;
    color: #fff !important;
    border-color: rgba(255, 255, 255, .95) !important;
    box-shadow: none !important;
    padding: 12px 10px;
    vertical-align: middle;
}

.date-card .table thead th {
    font-weight: 800;
    white-space: nowrap;
}

.date-card .table tbody th {
    font-weight: 700;
}

.date-card .table tbody td {
    font-weight: 500;
}

.date-card .table tr:first-child > * {
    border-top: 1px solid rgba(255, 255, 255, .95) !important;
}

.date-card .table tr:last-child > * {
    border-bottom: 1px solid rgba(255, 255, 255, .95) !important;
}

@media (max-width: 575px) {
    .date-card .table {
        font-size: .88rem;
    }

    .date-card .table > :not(caption) > * > * {
        padding: 10px 7px;
    }
}

.date-card p {
    line-height: 1.7;
    opacity: .95;
}

.date-icon {
    font-size: 3.2rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 20px;
}

.calendar-section {
    background: var(--conference-light);
}

.calendar-wrapper {
    max-width: 800px;
    background: #fff;
    border-radius: 20px;
    padding: 25px;
    box-shadow: 0 12px 35px rgba(18, 52, 81, .08);
}

.calendar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.calendar-header h3 {
    margin: 0;
    color: var(--conference-dark);
    font-weight: 800;
}

.calendar-arrow {
    border: 0;
    background: transparent;
    font-size: 2rem;
    color: var(--conference-dark);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 6px;
}

.calendar-weekdays > div {
    text-align: center;
    font-size: .75rem;
    font-weight: 700;
    color: #738594;
    padding: 10px 0;
}

.calendar-day {
    min-height: 72px;
    border: 1px solid #edf1f4;
    border-radius: 10px;
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    color: #455967;
}

.calendar-day.empty {
    border-color: transparent;
    background: transparent;
}

.calendar-day.conference-day {
    background: linear-gradient(135deg, var(--conference-primary), var(--conference-primary));
    border-color: var(--conference-primary);
    color: #fff;
    box-shadow: 0 8px 18px rgba(23, 74, 124, .25);
}

.calendar-day.conference-day strong {
    font-size: 1.5rem;
}

.calendar-day.conference-day small {
    font-size: .55rem;
    letter-spacing: .5px;
    margin-top: 3px;
}

.calendar-legend {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    font-size: .9rem;
    color: #637583;
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--conference-primary);
}

.registration-box {
    background: #f8fafc;
    border: 1px solid #e5edf3;
    border-radius: 20px;
    padding: 55px 25px;
}

.registration-box > span {
    color: var(--conference-secondary);
    letter-spacing: 2px;
    font-size: .8rem;
    font-weight: 700;
}

.registration-box h2 {
    color: var(--conference-dark);
    font-weight: 800;
    margin: 10px 0 15px;
}

.registration-box p {
    max-width: 720px;
    margin: 0 auto 25px;
    color: #61727e;
    line-height: 1.7;
}

.conference-footer {
    background: var(--conference-primary);
    color: rgba(255,255,255,.8);
    padding: 28px 0;
}

.conference-nav {
    background: var(--conference-primary);
}

.form-section {
    background: var(--conference-light);
    min-height: calc(100vh - 80px);
}

.form-card {
    max-width: 900px;
    background: #fff;
    border-radius: 20px;
    padding: 45px;
    box-shadow: 0 12px 35px rgba(18, 52, 81, .08);
}

.form-card h1 {
    color: var(--conference-dark);
    font-weight: 800;
    margin-top: 10px;
}

.form-card > .text-center p {
    color: #6c7d89;
}

.form-heading {
    color: var(--conference-dark);
    border-bottom: 2px solid #e9f0f5;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.form-control,
.form-select {
    padding: 12px 14px;
    border-color: #d7e1e8;
}

.form-control:focus,
.form-select:focus {
    border-color: var(--conference-secondary);
    box-shadow: 0 0 0 .2rem rgba(47, 127, 183, .15);
}

@media (max-width: 767px) {
    .conference-hero {
        min-height: 500px;
    }

    .hero-content {
        padding: 45px 0;
    }

    .calendar-wrapper {
        padding: 15px;
    }

    .calendar-day {
        min-height: 58px;
        padding: 5px;
    }

    .calendar-day.conference-day small {
        font-size: .42rem;
    }

    .form-card {
        padding: 25px 18px;
    }
}


/* =========================
   SCIENTIFIC PROGRAMME
   ========================= */

.program-section {
    background: #fff;
}

.program-days {
    max-width: 980px;
    margin: 0 auto 28px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.program-day {
    border: 1px solid #e5edf3;
    background: #f8fafc;
    border-radius: 14px;
    padding: 15px 18px;
    display: flex;
    align-items: center;
    gap: 14px;
    text-align: left;
    cursor: pointer;
    transition: .2s ease;
    color: var(--conference-dark);
}

.program-day:hover {
    border-color: var(--conference-primary);
    transform: translateY(-1px);
}

.program-day.active {
    background: var(--conference-primary);
    border-color: var(--conference-primary);
    color: #fff;
    box-shadow: 0 8px 22px rgba(200, 29, 35, .18);
}

.program-day-number {
    font-size: 2.1rem;
    line-height: 1;
    font-weight: 850;
}

.program-day-info {
    font-size: .9rem;
    line-height: 1.35;
    font-weight: 800;
    letter-spacing: .6px;
}

.program-day-info small {
    font-size: .7rem;
    opacity: .8;
    letter-spacing: 1px;
}

.program-panel {
    max-width: 980px;
    margin: 0 auto;
    display: none;
    background: #fff;
    border: 1px solid #e2ebf1;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 12px 35px rgba(18, 52, 81, .08);
}

.program-panel.active {
    display: block;
}

.program-location {
    padding: 16px 22px;
    background: var(--conference-dark);
    color: #fff;
    font-weight: 750;
    letter-spacing: .3px;
}

.program-row {
    display: grid;
    grid-template-columns: 155px 1fr;
    border-bottom: 1px solid #e7eef3;
}

.program-row:last-child {
    border-bottom: 0;
}

.program-time {
    padding: 22px 18px;
    color: var(--conference-primary);
    font-weight: 800;
    font-size: .95rem;
    background: #fff8f8;
    border-right: 1px solid #e7eef3;
    display: flex;
    align-items: flex-start;
}

.program-content {
    padding: 20px 24px;
}

.program-content h3 {
    margin: 5px 0 6px;
    color: var(--conference-dark);
    font-size: 1.12rem;
    font-weight: 800;
}

.program-content p {
    margin: 0;
    color: #667985;
    line-height: 1.6;
}

.program-tag {
    display: inline-block;
    color: var(--conference-primary);
    font-size: .68rem;
    font-weight: 850;
    letter-spacing: 1.2px;
}

.program-break .program-time {
    background: #f8fafc;
    color: var(--conference-secondary);
}

.program-break .program-content {
    background: #fbfcfd;
}

.program-break .program-tag {
    color: var(--conference-secondary);
}

.program-note {
    max-width: 980px;
    margin: 18px auto 0;
    padding: 14px 18px;
    border-left: 4px solid var(--conference-primary);
    background: #fff8f8;
    color: #667985;
    border-radius: 0 10px 10px 0;
    font-size: .88rem;
    line-height: 1.6;
}

.program-note strong {
    color: var(--conference-dark);
}

@media (max-width: 767px) {
    .program-days {
        grid-template-columns: 1fr;
    }

    .program-row {
        grid-template-columns: 1fr;
    }

    .program-time {
        padding: 13px 18px 5px;
        border-right: 0;
        background: #fff;
    }

    .program-content {
        padding: 8px 18px 20px;
    }

    .program-location {
        padding: 14px 18px;
    }
}