/* ===========================
   BigEvent.io - Design System
   =========================== */

/* CSS Variables */
:root {
    /* Colors */
    --color-dark-navy: #020d23;
    --color-dark-navy-light: #0a1628;
    --color-cyan: #00d4ff;
    --color-cyan-glow: rgba(0, 212, 255, 0.3);
    --color-white: #ffffff;
    --color-gray-100: #f5f7fa;
    --color-gray-200: #e8ebf0;
    --color-gray-300: #d1d5dc;
    --color-gray-600: #6b7280;
    --color-text-dark: #39415a;
    --color-text-light: #8892a6;

    /* Typography */
    --font-family: 'Overpass', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3.625rem;

    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px var(--color-cyan-glow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ===========================
   Reset & Base Styles
   =========================== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-lg);
    line-height: 1.6;
    color: var(--color-text-dark);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul,
ol {
    list-style: none;
}

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

input {
    font-family: inherit;
}

/* Skip Link */
.skip-link {
    position: absolute;
    left: -9999px;
    z-index: 9999;
    padding: var(--spacing-3) var(--spacing-6);
    background: var(--color-cyan);
    color: var(--color-dark-navy);
    font-weight: 600;
}

.skip-link:focus {
    left: var(--spacing-4);
    top: var(--spacing-4);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

/* ===========================
   Header
   =========================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    transition: background var(--transition-base);
}

.header.scrolled {
    background: var(--color-dark-navy);
    box-shadow: var(--shadow-lg);
}

.header__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) var(--spacing-6);
    max-width: 1400px;
    margin: 0 auto;
}

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

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: -0.02em;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.btn--featured {
    background: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-cyan);
    box-shadow: 0 0 15px var(--color-cyan-glow);
}

.btn--featured:hover {
    background: var(--color-cyan);
    color: var(--color-dark-navy);
    box-shadow: 0 0 25px var(--color-cyan-glow);
}

.btn__emoji {
    font-size: var(--font-size-base);
}

.btn--primary {
    background: var(--color-cyan);
    color: var(--color-dark-navy);
    font-weight: 700;
}

.btn--primary:hover {
    background: #00bfe6;
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

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

/* ===========================
   Hero Section
   =========================== */
.hero {
    position: relative;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-dark-navy);
    padding: var(--spacing-24) var(--spacing-6) var(--spacing-16);
    overflow: hidden;
}

.hero__container {
    max-width: 900px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero__title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.1;
    margin-bottom: var(--spacing-6);
}

.hero__title .highlight {
    color: var(--color-cyan);
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-10);
}

/* Search Bar */
.search-bar {
    display: flex;
    align-items: center;
    background: var(--color-white);
    border-radius: var(--radius-full);
    padding: var(--spacing-2);
    max-width: 600px;
    margin: 0 auto;
    box-shadow: var(--shadow-xl);
}

.search-bar__input {
    flex: 1;
    border: none;
    padding: var(--spacing-4) var(--spacing-6);
    font-size: var(--font-size-base);
    background: transparent;
    color: var(--color-text-dark);
}

.search-bar__input::placeholder {
    color: var(--color-text-light);
}

.search-bar__input:focus {
    outline: none;
}

.search-bar__btn {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--color-cyan);
    color: var(--color-dark-navy);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.search-bar__btn:hover {
    background: #00bfe6;
    transform: scale(1.05);
}

/* Hero Glow Effect */
.hero__glow {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80%;
    height: 300px;
    background: radial-gradient(ellipse at center bottom, var(--color-cyan-glow) 0%, transparent 70%);
    pointer-events: none;
}

/* ===========================
   Section Styles
   =========================== */
.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-8);
}

.topics-section,
.cities-section,
.countries-section {
    padding: var(--spacing-12) 0;
}

.topics-section {
    background: var(--color-white);
}

.cities-section {
    background: var(--color-gray-100);
}

.countries-section {
    background: var(--color-white);
}

/* Pills Grid */
.pills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-3);
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-dark);
    transition: all var(--transition-fast);
}

.pill:hover {
    border-color: var(--color-cyan);
    color: var(--color-cyan);
    box-shadow: var(--shadow-sm);
}

.pill__arrow {
    color: var(--color-cyan);
    font-size: var(--font-size-sm);
}

.cities-section .pill,
.countries-section .pill {
    background: var(--color-white);
}

/* Hidden Pills */
.pill--hidden {
    display: none;
}

.pills-grid.expanded .pill--hidden {
    display: inline-flex;
}

/* Show More Button */
.show-more-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-top: var(--spacing-6);
    padding: var(--spacing-3) var(--spacing-5);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-light);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.show-more-btn:hover {
    color: var(--color-cyan);
}

.show-more-btn.expanded {
    display: none;
}

/* ===========================
   Featured Events Section
   =========================== */
.featured-section {
    padding: var(--spacing-16) 0;
    background: var(--color-gray-100);
}

.featured-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-8);
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.featured-tabs {
    display: flex;
    gap: var(--spacing-2);
}

.tab-btn {
    padding: var(--spacing-2) var(--spacing-5);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-light);
    border-radius: var(--radius-full);
    transition: all var(--transition-fast);
}

.tab-btn:hover {
    color: var(--color-text-dark);
}

.tab-btn--active {
    background: var(--color-dark-navy);
    color: var(--color-white);
}

/* Events Grid */
.events-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

/* Event Card */
.event-card {
    display: block;
    text-decoration: none;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.event-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.event-card__image {
    position: relative;
    aspect-ratio: 16/10;
    overflow: hidden;
}

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

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

.event-card__date {
    position: absolute;
    top: var(--spacing-3);
    left: var(--spacing-3);
    background: var(--color-white);
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-sm);
    text-align: center;
    box-shadow: var(--shadow-md);
}

.event-card__month {
    display: block;
    font-size: var(--font-size-xs);
    font-weight: 700;
    color: var(--color-cyan);
    text-transform: uppercase;
}

.event-card__day {
    display: block;
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--color-text-dark);
    line-height: 1;
}

.event-card__badge {
    position: absolute;
    top: var(--spacing-3);
    right: var(--spacing-3);
    background: var(--color-dark-navy);
    color: var(--color-white);
    padding: var(--spacing-1) var(--spacing-3);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.event-card__content {
    padding: var(--spacing-5);
}

.event-card__duration {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-2);
}

.event-card__title {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-text-dark);
    line-height: 1.3;
}

/* Events Navigation */
.events-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-6);
}

.events-nav__link {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
}

.events-nav__link:hover {
    color: var(--color-cyan);
}

.events-nav__link--arrow {
    color: var(--color-text-dark);
}

/* Calendar Export */
.calendar-export {
    display: flex;
    justify-content: center;
}

.calendar-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-3) var(--spacing-5);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-dark);
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.calendar-btn:hover {
    border-color: var(--color-cyan);
    color: var(--color-cyan);
}

/* ===========================
   Partners Section
   =========================== */
.partners-section {
    padding: var(--spacing-16) 0;
    background: var(--color-white);
    text-align: center;
}

.partners-description {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    max-width: 700px;
    margin: 0 auto var(--spacing-10);
}

.partners-carousel {
    margin-bottom: var(--spacing-10);
    overflow: hidden;
}

.partners-track {
    display: flex;
    gap: var(--spacing-12);
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.partner-logo {
    opacity: 0.6;
    transition: opacity var(--transition-fast);
    filter: grayscale(100%);
}

.partner-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

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

/* ===========================
   Newsletter Section
   =========================== */
.newsletter-section {
    padding: var(--spacing-16) 0;
    background: var(--color-gray-100);
    text-align: center;
}

.newsletter-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-3);
}

.newsletter-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-6);
}

.newsletter-benefits {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-8);
    font-size: var(--font-size-sm);
    color: var(--color-text-dark);
}

.newsletter-benefits li {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.newsletter-form {
    display: flex;
    gap: var(--spacing-3);
    max-width: 450px;
    margin: 0 auto var(--spacing-4);
}

.newsletter-input {
    flex: 1;
    padding: var(--spacing-4) var(--spacing-5);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    background: var(--color-white);
}

.newsletter-input:focus {
    outline: none;
    border-color: var(--color-cyan);
}

.newsletter-disclaimer {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

.newsletter-disclaimer a {
    color: var(--color-cyan);
    text-decoration: underline;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--color-dark-navy);
    color: var(--color-white);
    padding: var(--spacing-16) 0 var(--spacing-10);
}

.footer__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-16);
    margin-bottom: var(--spacing-12);
}

.footer__logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    color: var(--color-white);
}

.footer__links {
    display: flex;
    gap: var(--spacing-16);
}

.footer__column {
    min-width: 150px;
}

.footer__heading {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray-300);
    margin-bottom: var(--spacing-4);
}

.footer__list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
}

.footer__list a {
    font-size: var(--font-size-sm);
    color: var(--color-gray-300);
    transition: color var(--transition-fast);
}

.footer__list a:hover {
    color: var(--color-cyan);
}

.footer__address {
    font-style: normal;
    font-size: var(--font-size-sm);
    color: var(--color-gray-300);
    line-height: 1.8;
}

.footer__bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-6) var(--spacing-6) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-4);
}

.footer__copyright {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.footer__terms {
    font-size: var(--font-size-sm);
    color: var(--color-gray-600);
}

.footer__terms:hover {
    color: var(--color-cyan);
}

.footer__social {
    display: flex;
    gap: var(--spacing-4);
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--color-gray-300);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.social-link:hover {
    color: var(--color-cyan);
    background: rgba(0, 212, 255, 0.1);
}

/* ===========================
   Newsletter Popup
   =========================== */
.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.popup.active {
    display: flex;
}

.popup__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.popup__content {
    position: relative;
    background: var(--color-white);
    padding: var(--spacing-10);
    border-radius: var(--radius-xl);
    max-width: 450px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: popupSlideIn 0.3s ease;
}

@keyframes popupSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.popup__close {
    position: absolute;
    top: var(--spacing-3);
    right: var(--spacing-4);
    width: 36px;
    height: 36px;
    font-size: 24px;
    color: var(--color-text-light);
    transition: color var(--transition-fast);
}

.popup__close:hover {
    color: var(--color-text-dark);
}

.popup__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: var(--spacing-2);
}

.popup__subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-5);
}

.popup__benefits {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-6);
    font-size: var(--font-size-sm);
    color: var(--color-text-dark);
}

.popup__form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.popup__input {
    padding: var(--spacing-4) var(--spacing-5);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
}

.popup__input:focus {
    outline: none;
    border-color: var(--color-cyan);
}

.popup__disclaimer {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

.popup__disclaimer a {
    color: var(--color-cyan);
}

/* ===========================
   Scroll to Top Button
   =========================== */
.scroll-top {
    position: fixed;
    bottom: var(--spacing-6);
    right: var(--spacing-6);
    width: 48px;
    height: 48px;
    background: var(--color-dark-navy);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 100;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--color-cyan);
    color: var(--color-dark-navy);
    transform: translateY(-4px);
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .hero__title {
        font-size: var(--font-size-4xl);
    }

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

@media (max-width: 768px) {
    .header__container {
        padding: var(--spacing-3) var(--spacing-4);
    }

    .hero {
        min-height: 50vh;
        padding: var(--spacing-20) var(--spacing-4) var(--spacing-12);
    }

    .hero__title {
        font-size: var(--font-size-3xl);
    }

    .hero__subtitle {
        font-size: var(--font-size-base);
    }

    .search-bar {
        flex-direction: column;
        border-radius: var(--radius-lg);
        padding: var(--spacing-3);
    }

    .search-bar__input {
        width: 100%;
        text-align: center;
    }

    .search-bar__btn {
        width: 100%;
        border-radius: var(--radius-md);
    }

    .section-title {
        font-size: var(--font-size-xl);
    }

    .featured-header {
        flex-direction: column;
        align-items: flex-start;
    }

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

    .events-nav {
        flex-wrap: wrap;
        gap: var(--spacing-4);
    }

    .newsletter-form {
        flex-direction: column;
    }

    .footer__container {
        flex-direction: column;
        gap: var(--spacing-8);
    }

    .footer__links {
        flex-wrap: wrap;
        gap: var(--spacing-8);
    }

    .footer__bottom {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero__title {
        font-size: var(--font-size-2xl);
    }

    .pills-grid {
        gap: var(--spacing-2);
    }

    .pill {
        padding: var(--spacing-2) var(--spacing-4);
        font-size: var(--font-size-xs);
    }

    .popup__content {
        padding: var(--spacing-6);
    }
}