/* =====================================================
   EXPOTECH 2026 - Landing Page Styles
   Universidad Continental - Proyecto Académico
   ===================================================== */

:root {
    --color-primary: #C8107E;
    --color-primary-dark: #A00D65;
    --color-primary-light: #E91E9C;
    --color-secondary: #7E24E5;
    --color-secondary-dark: #6802C1;
    --color-secondary-light: #9B4DFF;

    --color-white: #FFFFFF;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-400: #9CA3AF;
    --color-gray-500: #6B7280;
    --color-gray-600: #4B5563;
    --color-gray-700: #374151;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;

    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Inter', sans-serif;

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    --z-fixed: 300;
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-secondary);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-700);
    background-color: var(--color-white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-base);
}

ul { list-style: none; }

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
}

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

/* ===================== BUTTONS ===================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
}

.btn--primary:hover {
    background: linear-gradient(135deg, var(--color-primary-dark), var(--color-secondary-dark));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(200, 16, 126, 0.3);
}

.btn--white {
    background: var(--color-white);
    color: var(--color-secondary);
}

.btn--white:hover {
    background: var(--color-gray-100);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3);
}

.btn--outline-white {
    background: transparent;
    color: var(--color-white);
    border-color: rgba(255, 255, 255, 0.4);
}

.btn--outline-white:hover {
    background: var(--color-white);
    color: var(--color-secondary);
    border-color: var(--color-white);
    transform: translateY(-2px);
}

.btn--lg {
    padding: 1rem 2.25rem;
    font-size: 1rem;
}

.btn--full {
    width: 100%;
}

/* ===================== SECTION HEADER ===================== */
.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-header__tag {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(200, 16, 126, 0.08), rgba(126, 36, 229, 0.08));
    color: var(--color-primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.section-header__title {
    font-size: 2.25rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--color-gray-900);
}

.section-header__subtitle {
    font-size: 1.05rem;
    color: var(--color-gray-500);
    line-height: 1.7;
}

/* ===================== FADE-IN ===================== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===================== NAVBAR ===================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: var(--z-fixed);
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
    border-bottom-color: transparent;
}

.navbar__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    height: 80px;
}

.navbar__brand {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.navbar__uc-logo {
    display: flex;
    align-items: center;
}

.navbar__uc-img {
    height: 42px;
    width: auto;
    object-fit: contain;
}

.navbar__divider {
    width: 1px;
    height: 30px;
    background: var(--color-gray-300);
}

.navbar__expotech-logo {
    display: flex;
    align-items: center;
}

.navbar__expotech-img {
    height: 48px;
    width: auto;
    object-fit: contain;
}

.navbar__menu {
    display: flex;
    align-items: center;
}

.navbar__list {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.navbar__link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-gray-600);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.navbar__link:hover,
.navbar__link.active {
    color: var(--color-secondary);
    background: rgba(126, 36, 229, 0.06);
}

.navbar__link--cta {
    background: var(--color-secondary);
    color: var(--color-white) !important;
    padding: 0.625rem 1.5rem;
    margin-left: 0.5rem;
}

.navbar__link--cta:hover {
    background: var(--color-secondary-dark) !important;
    transform: translateY(-1px);
}

/* Hamburger */
.navbar__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    z-index: var(--z-fixed);
}

.navbar__toggle-bar {
    display: block;
    width: 100%;
    height: 2.5px;
    background: var(--color-gray-900);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.navbar__toggle.active .navbar__toggle-bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.navbar__toggle.active .navbar__toggle-bar:nth-child(2) {
    opacity: 0;
}

.navbar__toggle.active .navbar__toggle-bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ===================== HERO ===================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero__bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero__bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero__bg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-secondary-dark) 0%, var(--color-primary-dark) 100%);
    opacity: 0.92;
}

.hero__container {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 8rem var(--container-padding) 4rem;
}

.hero__badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    color: var(--color-white);
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 1.5rem;
}

.hero__title {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--color-white);
    margin-bottom: 1rem;
    line-height: 1.1;
}

.hero__title-accent {
    color: rgba(255, 255, 255, 0.9);
}

.hero__title-year {
    display: block;
    font-size: 4rem;
    background: linear-gradient(135deg, #FFD700, #FFA500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 1.5rem;
    color: rgba(255, 255, 255, 0.95);
    font-weight: 500;
    font-style: italic;
    margin-bottom: 1rem;
}

.hero__description {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.75);
    line-height: 1.7;
    margin-bottom: 2rem;
    max-width: 520px;
}

.hero__buttons {
    display: flex;
    gap: 1rem;
    margin-bottom: 3rem;
    flex-wrap: wrap;
}

.hero__stats {
    display: flex;
    gap: 3rem;
}

.hero__stat {
    text-align: center;
}

.hero__stat-number {
    display: block;
    font-family: var(--font-primary);
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--color-white);
}

.hero__stat-label {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    text-transform: uppercase;
    letter-spacing: 1px;
}

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

.hero__image img {
    width: 100%;
    max-width: 480px;
    border-radius: var(--radius-2xl);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.3);
    border: 4px solid rgba(255, 255, 255, 0.15);
}

/* ===================== ABOUT ===================== */
.about {
    padding: 6rem 0;
    background: var(--color-white);
}

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

.about__card {
    background: var(--color-white);
    padding: 2rem;
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-gray-200);
    transition: all var(--transition-base);
    position: relative;
}

.about__card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: transparent;
}

.about__card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, rgba(200, 16, 126, 0.08), rgba(126, 36, 229, 0.08));
    color: var(--color-secondary);
    border-radius: var(--radius-lg);
    font-size: 1.25rem;
    margin-bottom: 1.25rem;
    transition: all var(--transition-base);
}

.about__card:hover .about__card-icon {
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
    transform: scale(1.05);
}

.about__card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--color-gray-900);
}

.about__card-description {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.about__card-tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: linear-gradient(135deg, rgba(200, 16, 126, 0.06), rgba(126, 36, 229, 0.06));
    color: var(--color-primary);
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===================== SPEAKERS ===================== */
.speakers {
    padding: 6rem 0;
    background: var(--color-gray-50);
}

.speakers__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.speaker-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    border: 1px solid var(--color-gray-100);
}

.speaker-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.speaker-card__image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 3/2;
}

.speaker-card__image img {
    width: 100%;
    height: 100%;
    transition: transform var(--transition-slow);
}

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

.speaker-card__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(200, 16, 126, 0.9), rgba(126, 36, 229, 0.7));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.speaker-card:hover .speaker-card__overlay {
    opacity: 1;
}

.speaker-card__social {
    display: flex;
    gap: 0.75rem;
}

.speaker-card__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-white);
    color: var(--color-primary);
    border-radius: var(--radius-full);
    font-size: 1rem;
    transition: all var(--transition-base);
    transform: translateY(15px);
    opacity: 0;
}

.speaker-card:hover .speaker-card__social-link {
    transform: translateY(0);
    opacity: 1;
}

.speaker-card__social-link:hover {
    background: var(--color-gray-900);
    color: var(--color-white);
}

.speaker-card__info {
    padding: 1.5rem;
}

.speaker-card__name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-gray-900);
    margin-bottom: 0.25rem;
}

.speaker-card__role {
    font-size: 0.85rem;
    color: var(--color-secondary);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.speaker-card__company {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.speaker-card__company i {
    color: var(--color-gray-400);
    font-size: 0.75rem;
}

.speaker-card__bio {
    font-size: 0.8rem;
    color: var(--color-gray-500);
    line-height: 1.6;
}

/* ===================== STATS ===================== */
.stats {
    position: relative;
    padding: 5rem 0;
    overflow: hidden;
}

.stats__bg {
    position: absolute;
    inset: 0;
}

.stats__bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.stats__bg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-secondary-dark) 0%, var(--color-primary-dark) 100%);
    opacity: 0.95;
}

.stats__grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    text-align: center;
}

.stats__item {
    padding: 2rem;
}

.stats__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin: 0 auto 1.25rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    font-size: 1.5rem;
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.15);
}

.stats__number {
    display: inline;
    font-family: var(--font-primary);
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-white);
    line-height: 1;
}

.stats__plus {
    display: inline;
    font-family: var(--font-primary);
    font-size: 1.75rem;
    font-weight: 800;
    color: rgba(255, 215, 0, 0.8);
}

.stats__label {
    font-size: 1rem;
    color: rgba(255, 255, 255, 0.7);
    margin-top: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

/* ===================== GALLERY ===================== */
.gallery {
    padding: 6rem 0;
    background: var(--color-white);
}

.gallery__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: 260px;
    gap: 1.5rem;
}

.gallery__item {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
}

.gallery__item--wide {
    grid-column: span 2;
}

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

.gallery__item:hover img {
    transform: scale(1.08);
}

.gallery__item-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(200, 16, 126, 0.85), rgba(126, 36, 229, 0.6));
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    color: var(--color-white);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.gallery__item:hover .gallery__item-overlay {
    opacity: 1;
}

.gallery__item-overlay i {
    font-size: 1.75rem;
    transform: scale(0);
    transition: transform 400ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.gallery__item:hover .gallery__item-overlay i {
    transform: scale(1);
}

.gallery__item-overlay span {
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    transform: translateY(15px);
    transition: transform var(--transition-base);
}

.gallery__item:hover .gallery__item-overlay span {
    transform: translateY(0);
}

/* ===================== REGISTER ===================== */
.register {
    padding: 6rem 0;
    background: var(--color-gray-50);
}

.register__wrapper {
    max-width: 800px;
    margin: 0 auto;
}

.register__form {
    background: var(--color-white);
    padding: 2.5rem;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-gray-100);
}

.form__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.form__group {
    display: flex;
    flex-direction: column;
}

.form__label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-gray-700);
    margin-bottom: 0.5rem;
}

.form__label i {
    color: var(--color-secondary);
    font-size: 0.8rem;
}

.form__input,
.form__select {
    padding: 0.875rem 1rem;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-full);
    font-size: 0.95rem;
    color: var(--color-gray-700);
    background: var(--color-white);
    transition: all var(--transition-base);
    outline: none;
    appearance: none;
}

.form__input::placeholder {
    color: var(--color-gray-400);
}

.form__input:focus,
.form__select:focus {
    border-color: var(--color-secondary);
    box-shadow: 0 0 0 4px rgba(126, 36, 229, 0.1);
}

.form__input.error,
.form__select.error {
    border-color: #EF4444;
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.1);
}

.form__input.success,
.form__select.success {
    border-color: #10B981;
}

.form__select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%236B7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
    cursor: pointer;
}

.form__error {
    display: block;
    font-size: 0.75rem;
    color: #EF4444;
    margin-top: 0.25rem;
    min-height: 1rem;
}

/* Checkbox */
.form__group--checkbox {
    margin-bottom: 2rem;
}

.form__checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

.form__checkbox {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.form__checkbox-custom {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
    margin-top: 2px;
}

.form__checkbox-custom::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 10px;
    color: var(--color-white);
    opacity: 0;
    transform: scale(0);
    transition: all var(--transition-base);
}

.form__checkbox:checked + .form__checkbox-custom {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
}

.form__checkbox:checked + .form__checkbox-custom::after {
    opacity: 1;
    transform: scale(1);
}

.form__checkbox-text {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    line-height: 1.5;
}

.form__link {
    color: var(--color-secondary);
    font-weight: 600;
}

.form__link:hover {
    color: var(--color-primary);
    text-decoration: underline;
}

/* ===================== FOOTER ===================== */
.footer {
    background: var(--color-gray-900);
    color: var(--color-white);
}

.footer__top {
    padding: 4rem 0;
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 3rem;
}

.footer__logo {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}

.footer__logo-img {
    height: 50px;
    width: auto;
    object-fit: contain;
}

.footer__description {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.footer__social {
    display: flex;
    gap: 0.75rem;
}

.footer__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-lg);
    font-size: 0.95rem;
    transition: all var(--transition-base);
}

.footer__social-link:hover {
    background: var(--color-secondary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.footer__links-title {
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 1.5rem;
}

.footer__links-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer__link {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
    transition: all var(--transition-base);
}

.footer__link:hover {
    color: var(--color-white);
    padding-left: 0.5rem;
}

.footer__contact-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer__contact-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer__contact-list li i {
    color: var(--color-primary);
    margin-top: 3px;
    flex-shrink: 0;
}

.footer__contact-list li a {
    color: rgba(255, 255, 255, 0.6);
}

.footer__contact-list li a:hover {
    color: var(--color-white);
}

.footer__bottom {
    padding: 1.5rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer__copyright {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

/* ===================== BACK TO TOP ===================== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 46px;
    height: 46px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    color: var(--color-white);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    box-shadow: 0 8px 25px rgba(200, 16, 126, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: all var(--transition-base);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(200, 16, 126, 0.4);
}

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

@media (max-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
        padding-top: 7rem;
    }

    .hero__content { order: 1; }

    .hero__image {
        order: 0;
        margin-bottom: 2rem;
    }

    .hero__image img { max-width: 380px; }

    .hero__description { margin: 0 auto 2rem; }

    .hero__buttons { justify-content: center; }

    .hero__stats { justify-content: center; }

    .about__grid { grid-template-columns: repeat(2, 1fr); }

    .speakers__grid { grid-template-columns: repeat(2, 1fr); }

    .stats__grid { grid-template-columns: repeat(2, 1fr); }

    .gallery__grid {
        grid-template-columns: repeat(2, 1fr);
        grid-auto-rows: 220px;
    }

    .gallery__item--wide { grid-column: span 1; }

    .footer__grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }

    .footer__brand { grid-column: span 2; }
}

@media (max-width: 768px) {
    .navbar__toggle { display: flex; }

    .navbar__uc-img { height: 32px; }

    .navbar__divider { height: 24px; }

    .navbar__expotech-img { height: 38px; }

    .navbar__menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--color-white);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 5rem 1.5rem 1.5rem;
        box-shadow: var(--shadow-xl);
        transition: right var(--transition-base);
        z-index: var(--z-fixed);
    }

    .navbar__menu.active { right: 0; }

    .navbar__list {
        flex-direction: column;
        align-items: stretch;
        gap: 0.25rem;
    }

    .navbar__link {
        color: var(--color-gray-700);
        padding: 0.75rem 1rem;
    }

    .navbar__link:hover,
    .navbar__link.active {
        color: var(--color-secondary);
        background: rgba(126, 36, 229, 0.06);
    }

    .navbar__link--cta {
        margin-left: 0;
        margin-top: 0.5rem;
        text-align: center;
    }

    .hero__title { font-size: 2.5rem; }

    .hero__title-year { font-size: 3rem; }

    .hero__subtitle { font-size: 1.15rem; }

    .hero__stats {
        flex-wrap: wrap;
        gap: 1.5rem;
    }

    .about__grid { grid-template-columns: 1fr; }

    .speakers__grid {
        grid-template-columns: 1fr;
        max-width: 380px;
        margin: 0 auto;
    }

    .stats__grid { grid-template-columns: repeat(2, 1fr); gap: 1rem; }

    .stats__number { font-size: 2.25rem; }

    .gallery__grid {
        grid-template-columns: 1fr;
        grid-auto-rows: 200px;
    }

    .form__row { grid-template-columns: 1fr; }

    .register__form { padding: 1.5rem; }

    .footer__grid { grid-template-columns: 1fr; }

    .footer__brand { grid-column: span 1; }

    .section-header { margin-bottom: 3rem; }

    .section-header__title { font-size: 1.75rem; }
}

@media (max-width: 480px) {
    .hero {
        min-height: auto;
        padding: 5rem 0 3rem;
    }

    .hero__container { padding-top: 5rem; }

    .hero__title { font-size: 2rem; }

    .hero__title-year { font-size: 2.5rem; }

    .hero__subtitle { font-size: 1rem; }

    .hero__buttons { flex-direction: column; align-items: stretch; }

    .hero__stats { flex-direction: column; align-items: center; }

    .btn--lg { padding: 0.875rem 1.5rem; }

    .stats__grid { grid-template-columns: 1fr 1fr; }

    .stats__item { padding: 1rem; }

    .stats__number { font-size: 1.75rem; }

    .gallery__grid { grid-auto-rows: 180px; }

    .footer__social { justify-content: center; }

    .footer__links-list,
    .footer__contact-list { align-items: center; text-align: center; }

    .footer__contact-list li { justify-content: center; }
}

/* Overlay for mobile menu */
.navbar__overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: calc(var(--z-fixed) - 1);
}

.navbar__overlay.active {
    opacity: 1;
    visibility: visible;
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html { scroll-behavior: auto; }
    .fade-in { opacity: 1; transform: none; }
}