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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, sans-serif;
    background: #f7f9fc;
    color: #172033;
    line-height: 1.6;

    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

a {
    text-decoration: none;
    color: inherit;
}

.container {
    width: min(1120px, 92%);
    margin: auto;
}


/* =========================
   NAVBAR
========================= */

.navbar {
    background: #ffffff;
    border-bottom: 1px solid #e8ebf0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-content {
    height: 72px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 25px;
    font-weight: 800;
    color: #14213d;
    margin-left: -20px;
}

.logo span {
    color: #2563eb;
}

nav {
    display: flex;
    gap: 28px;
}

nav a {
    color: #4b5563;
    font-weight: 600;
}

nav a:hover {
    color: #2563eb;
}


/* =========================
   HERO
========================= */

.hero {
    position: relative;

    background-image:
        linear-gradient(
            rgba(239, 246, 255, 0.80),
            rgba(255, 255, 255, 0.70)
        ),
        url("../images/campus-event.png");

    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;

    padding: 100px 0;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.hero-text {
    max-width: 900px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    padding: 7px 14px;
    background: #dbeafe;
    color: #2563eb;
    border-radius: 30px;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: clamp(40px, 6vw, 68px);
    line-height: 1.1;
    margin-bottom: 25px;
}

.hero h1 span {
    color: #2563eb;
}

.hero p {
    max-width: 750px;
    color: #162335;
    font-size: 18px;
    margin: 0 auto 30px;
}

/* =========================
   BUTTON
========================= */

.btn {
    display: inline-block;
    padding: 13px 23px;
    border-radius: 8px;
    font-weight: 700;
    border: none;
    cursor: pointer;
}

.primary-btn {
    background: #2563eb;
    color: white;
}

.primary-btn:hover {
    background: #1d4ed8;
}

.secondary-btn {
    background: white;
    border: 1px solid #d7dce5;
    color: #172033;
}


/* =========================
   SECTION
========================= */

.section {
    padding: 30px 0;
}

.section-heading {
    text-align: center;
    margin-bottom: 45px;
}

.section-heading span {
    color: #2563eb;
    font-weight: 700;
}

.section-heading h2 {
    font-size: 36px;
    margin: 5px 0 10px;
}

.section-heading p {
    color: #64748b;
}


/* =========================
   EVENT CARD
========================= */

.event-grid {
    display: grid;
    grid-template-columns:
        repeat(auto-fit, minmax(280px, 1fr));

    gap: 25px;
}

.event-card {
    background: white;
    border-radius: 14px;
    overflow: hidden;
    border: 1px solid #e7eaf0;
    transition: 0.3s;
}

.event-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.08);
}

.event-image {
    width: 100%;
    height: 190px;
    object-fit: cover;
}

.event-content {
    padding: 20px;
}

.event-category {
    display: inline-block;
    background: #eff6ff;
    color: #2563eb;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    margin-bottom: 12px;
}

.event-content h3 {
    margin-bottom: 12px;
    font-size: 21px;
}

.event-info {
    color: #64748b;
    font-size: 14px;
    margin-bottom: 6px;
}

.event-content .btn {
    margin-top: 15px;
    width: 100%;
    text-align: center;
}


/* =========================
   CATEGORIES
========================= */

.categories-section {
    background: #ffffff;
}

.category-grid {
    display: grid;
    grid-template-columns:
        repeat(auto-fit, minmax(210px, 1fr));

    gap: 20px;
}

.category-card {
    text-align: center;
    padding: 30px 20px;
    border: 1px solid #e7eaf0;
    border-radius: 12px;
    transition: 0.3s;
}

.category-card:hover {
    border-color: #2563eb;
    transform: translateY(-4px);
}

.category-icon {
    font-size: 40px;
    margin-bottom: 10px;
}

.category-card p {
    color: #64748b;
}


/* =========================
   FOOTER
========================= */

.footer {
    background: #ffffff;
    color: #000308;
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid #e5e7eb;
}


/* =========================
   RESPONSIVE
========================= */

@media (max-width: 700px) {

    .nav-content {
        height: auto;
        padding: 18px 0;
        flex-direction: column;
        gap: 15px;
    }

    nav {
        gap: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        padding: 70px 0;
    }

    .hero h1 {
        font-size: 42px;
    }

    .section {
        padding: 55px 0;
    }

}


.filters {
    display: flex;
    gap: 15px;
    margin-bottom: 35px;
}

.filters input,
.filters select {
    padding: 13px 15px;
    border: 1px solid #d8dde6;
    border-radius: 8px;
    font-size: 15px;
    outline: none;
}

.filters input {
    flex: 1;
}

.filters input:focus,
.filters select:focus {
    border-color: #2563eb;
}

@media (max-width: 600px) {

    .filters {
        flex-direction: column;
    }

}

.event-details {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    border: 1px solid #e5e7eb;
}

.details-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.details-content {
    padding: 40px;
}

.details-content h1 {
    font-size: 40px;
    margin: 10px 0 20px;
}

.details-content > p {
    color: #64748b;
    margin-bottom: 25px;
}

.details-info {
    margin-bottom: 30px;
}

.details-info p {
    margin-bottom: 8px;
}

@media (max-width: 600px) {

    .details-image {
        height: 250px;
    }

    .details-content {
        padding: 25px;
    }

    .details-content h1 {
        font-size: 30px;
    }

}

.form-wrapper {
    max-width: 650px;
    margin: auto;
    background: white;
    padding: 40px;
    border-radius: 15px;
    border: 1px solid #e5e7eb;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-weight: 700;
    margin-bottom: 7px;
}

.form-group input {
    width: 100%;
    padding: 13px;
    border: 1px solid #d8dde6;
    border-radius: 8px;
    font-size: 15px;
}

.form-group input:focus {
    outline: none;
    border-color: #2563eb;
}

.form-group small {
    display: block;
    color: #dc2626;
    margin-top: 5px;
}

.success-message {
    margin-top: 20px;
    color: #15803d;
    font-weight: 700;
}



.registration-list {
    display: grid;
    gap: 20px;
    max-width: 800px;
    margin: auto;
}

.registration-card {
    background: white;
    padding: 25px;
    border: 1px solid #e5e7eb;
    border-radius: 12px;
}

.registration-card h2 {
    margin-bottom: 15px;
    color: #2563eb;
}

.registration-card p {
    margin-bottom: 6px;
    color: #64748b;
}

.empty-state {
    text-align: center;
    background: white;
    padding: 50px 20px;
    border-radius: 12px;
}

/* =========================
   Registration Actions
========================= */

.registration-actions {
    display: flex;
    gap: 12px;
    margin-top: 25px;
    flex-wrap: wrap;
}


.download-btn,
.cancel-btn {
    padding: 11px 18px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}


/* Download PDF */

.download-btn {
    background: #2563eb;
    color: white;
    border: 1px solid #2563eb;
}


.download-btn:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
}


/* Cancel Registration */

.cancel-btn {
    background: #ffffff;
    color: #dc2626;
    border: 1px solid #fecaca;
}


.cancel-btn:hover {
    background: #fee2e2;
}