/**
 * Phlaro Gaming Platform - Theme Stylesheet
 * Mobile-first design with ui7b- prefix for all classes
 * Color palette: LightSeaGreen, Dark, MediumSeaGreen, Teal, PaleGreen
 * @version 1.0.0
 */

/* ===== CSS VARIABLES ===== */
:root {
    /* Base font size for rem calculations (1rem = 10px) */
    font-size: 62.5%;

    /* Color Palette */
    --ui7b-primary: #20B2AA;        /* LightSeaGreen - main brand color */
    --ui7b-dark: #0E1621;           /* Dark navy - backgrounds */
    --ui7b-accent: #3CB371;         /* MediumSeaGreen - highlights */
    --ui7b-teal: #004D40;           /* Dark teal - depth */
    --ui7b-pale: #9AFF9A;           /* PaleGreen - accents */

    /* Functional Colors */
    --ui7b-text-primary: #FFFFFF;
    --ui7b-text-secondary: #E0E0E0;
    --ui7b-text-muted: #B0B0B0;
    --ui7b-success: #3CB371;
    --ui7b-warning: #FFB84D;
    --ui7b-danger: #FF5252;

    /* Spacing Scale */
    --ui7b-space-xs: 0.4rem;
    --ui7b-space-sm: 0.8rem;
    --ui7b-space-md: 1.6rem;
    --ui7b-space-lg: 2.4rem;
    --ui7b-space-xl: 3.2rem;
    --ui7b-space-xxl: 4.8rem;

    /* Border Radius */
    --ui7b-radius-sm: 0.4rem;
    --ui7b-radius-md: 0.8rem;
    --ui7b-radius-lg: 1.2rem;
    --ui7b-radius-xl: 1.6rem;
    --ui7b-radius-round: 50%;

    /* Shadows */
    --ui7b-shadow-sm: 0 0.2rem 0.4rem rgba(0, 0, 0, 0.1);
    --ui7b-shadow-md: 0 0.4rem 0.8rem rgba(0, 0, 0, 0.15);
    --ui7b-shadow-lg: 0 0.8rem 1.6rem rgba(0, 0, 0, 0.2);
    --ui7b-shadow-glow: 0 0 2rem rgba(32, 178, 170, 0.4);

    /* Transitions */
    --ui7b-transition-fast: 0.15s ease;
    --ui7b-transition-base: 0.3s ease;
    --ui7b-transition-slow: 0.5s ease;

    /* Z-index Scale */
    --ui7b-z-dropdown: 1000;
    --ui7b-z-sticky: 1020;
    --ui7b-z-fixed: 1030;
    --ui7b-z-modal: 1050;
    --ui7b-z-tooltip: 1070;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    font-size: 1.4rem;
    line-height: 1.6;
    color: var(--ui7b-text-primary);
    background-color: var(--ui7b-dark);
    max-width: 430px;
    margin: 0 auto;
    overflow-x: hidden;
    position: relative;
}

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

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

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

ul, ol {
    list-style: none;
}

/* ===== LAYOUT STRUCTURE ===== */
.ui7b-wrapper {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.ui7b-header {
    position: sticky;
    top: 0;
    background: linear-gradient(135deg, var(--ui7b-dark) 0%, var(--ui7b-teal) 100%);
    padding: var(--ui7b-space-md);
    z-index: var(--ui7b-z-sticky);
    box-shadow: var(--ui7b-shadow-md);
    border-bottom: 0.2rem solid var(--ui7b-primary);
}

.ui7b-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 390px;
    margin: 0 auto;
}

.ui7b-logo {
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--ui7b-primary);
    text-transform: uppercase;
    letter-spacing: 0.1rem;
    text-shadow: 0 0.2rem 0.4rem rgba(0, 0, 0, 0.3);
}

.ui7b-logo-accent {
    color: var(--ui7b-pale);
}

.ui7b-main {
    flex: 1;
    padding-bottom: 7rem;
}

.ui7b-container {
    padding: var(--ui7b-space-md);
    max-width: 390px;
    margin: 0 auto;
}

.ui7b-section {
    margin-bottom: var(--ui7b-space-xl);
}

.ui7b-section-header {
    margin-bottom: var(--ui7b-space-lg);
}

.ui7b-section-title {
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--ui7b-primary);
    margin-bottom: var(--ui7b-space-sm);
    text-transform: capitalize;
}

.ui7b-section-subtitle {
    font-size: 1.4rem;
    color: var(--ui7b-text-secondary);
    line-height: 1.5;
}

/* ===== NAVIGATION ===== */
.ui7b-hamburger {
    width: 3rem;
    height: 3rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.4rem;
    cursor: pointer;
    z-index: var(--ui7b-z-fixed);
}

.ui7b-hamburger-line {
    width: 100%;
    height: 0.3rem;
    background: var(--ui7b-primary);
    border-radius: 0.2rem;
    transition: var(--ui7b-transition-base);
}

.ui7b-hamburger.ui7b-active .ui7b-hamburger-line:nth-child(1) {
    transform: translateY(0.9rem) rotate(45deg);
}

.ui7b-hamburger.ui7b-active .ui7b-hamburger-line:nth-child(2) {
    opacity: 0;
}

.ui7b-hamburger.ui7b-active .ui7b-hamburger-line:nth-child(3) {
    transform: translateY(-0.9rem) rotate(-45deg);
}

.ui7b-mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 30rem;
    height: 100vh;
    background: linear-gradient(180deg, var(--ui7b-teal) 0%, var(--ui7b-dark) 100%);
    z-index: var(--ui7b-z-modal);
    transition: right var(--ui7b-transition-base);
    box-shadow: -0.4rem 0 1.6rem rgba(0, 0, 0, 0.5);
    overflow-y: auto;
}

.ui7b-mobile-nav.ui7b-active {
    right: 0;
}

.ui7b-nav-list {
    padding: var(--ui7b-space-xl) var(--ui7b-space-lg);
}

.ui7b-nav-item {
    margin-bottom: var(--ui7b-space-md);
}

.ui7b-nav-link {
    display: block;
    padding: var(--ui7b-space-md);
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--ui7b-text-primary);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--ui7b-radius-md);
    border-left: 0.4rem solid var(--ui7b-primary);
    transition: var(--ui7b-transition-base);
}

.ui7b-nav-link:hover,
.ui7b-nav-link:active {
    background: rgba(32, 178, 170, 0.15);
    transform: translateX(0.4rem);
}

/* Bottom Navigation Bar */
.ui7b-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 430px;
    background: linear-gradient(180deg, var(--ui7b-teal) 0%, var(--ui7b-dark) 100%);
    display: flex;
    justify-content: space-around;
    padding: var(--ui7b-space-sm) 0;
    z-index: var(--ui7b-z-fixed);
    box-shadow: 0 -0.4rem 1.6rem rgba(0, 0, 0, 0.3);
    border-top: 0.2rem solid var(--ui7b-primary);
}

.ui7b-bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 4.4rem;
    min-height: 4.4rem;
    padding: var(--ui7b-space-xs);
    cursor: pointer;
    transition: var(--ui7b-transition-fast);
}

.ui7b-bottom-nav-icon {
    font-size: 2.2rem;
    color: var(--ui7b-primary);
    margin-bottom: 0.2rem;
}

.ui7b-bottom-nav-label {
    font-size: 1rem;
    color: var(--ui7b-text-secondary);
    text-align: center;
}

.ui7b-bottom-nav-item:active {
    transform: scale(0.95);
}

.ui7b-bottom-nav-item.ui7b-active .ui7b-bottom-nav-icon {
    color: var(--ui7b-pale);
}

.ui7b-bottom-nav-item.ui7b-active .ui7b-bottom-nav-label {
    color: var(--ui7b-pale);
}

/* ===== BUTTONS ===== */
.ui7b-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 4.4rem;
    padding: var(--ui7b-space-md) var(--ui7b-space-lg);
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
    border-radius: var(--ui7b-radius-md);
    transition: var(--ui7b-transition-base);
    cursor: pointer;
    white-space: nowrap;
}

.ui7b-btn-primary {
    background: linear-gradient(135deg, var(--ui7b-primary) 0%, var(--ui7b-accent) 100%);
    color: var(--ui7b-dark);
    box-shadow: var(--ui7b-shadow-md);
}

.ui7b-btn-primary:hover {
    transform: translateY(-0.2rem);
    box-shadow: var(--ui7b-shadow-lg), var(--ui7b-shadow-glow);
}

.ui7b-btn-primary:active {
    transform: translateY(0);
}

.ui7b-btn-secondary {
    background: rgba(32, 178, 170, 0.15);
    color: var(--ui7b-primary);
    border: 0.2rem solid var(--ui7b-primary);
}

.ui7b-btn-secondary:hover {
    background: rgba(32, 178, 170, 0.25);
}

.ui7b-btn-block {
    display: flex;
    width: 100%;
}

.ui7b-btn-lg {
    min-height: 5.2rem;
    font-size: 1.7rem;
    padding: var(--ui7b-space-lg) var(--ui7b-space-xl);
}

.ui7b-btn-sm {
    min-height: 3.6rem;
    font-size: 1.3rem;
    padding: var(--ui7b-space-sm) var(--ui7b-space-md);
}

/* ===== CAROUSEL ===== */
.ui7b-carousel {
    position: relative;
    width: 100%;
    overflow: hidden;
    border-radius: var(--ui7b-radius-lg);
    margin-bottom: var(--ui7b-space-lg);
    box-shadow: var(--ui7b-shadow-lg);
}

.ui7b-carousel-track {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
}

.ui7b-carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity var(--ui7b-transition-slow);
    pointer-events: none;
}

.ui7b-carousel-slide.ui7b-active {
    opacity: 1;
    pointer-events: auto;
}

.ui7b-carousel-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: pointer;
}

.ui7b-carousel-dots {
    position: absolute;
    bottom: var(--ui7b-space-md);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: var(--ui7b-space-sm);
    z-index: 10;
}

.ui7b-carousel-dot {
    width: 1rem;
    height: 1rem;
    border-radius: var(--ui7b-radius-round);
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--ui7b-transition-base);
}

.ui7b-carousel-dot.ui7b-active {
    background: var(--ui7b-primary);
    width: 3rem;
}

/* ===== CARDS ===== */
.ui7b-card {
    background: linear-gradient(135deg, rgba(0, 77, 64, 0.4) 0%, rgba(14, 22, 33, 0.6) 100%);
    border-radius: var(--ui7b-radius-lg);
    padding: var(--ui7b-space-lg);
    margin-bottom: var(--ui7b-space-md);
    border: 0.1rem solid rgba(32, 178, 170, 0.2);
    box-shadow: var(--ui7b-shadow-md);
    transition: var(--ui7b-transition-base);
}

.ui7b-card:hover {
    border-color: var(--ui7b-primary);
    box-shadow: var(--ui7b-shadow-lg);
    transform: translateY(-0.2rem);
}

.ui7b-card-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--ui7b-primary);
    margin-bottom: var(--ui7b-space-sm);
}

.ui7b-card-text {
    font-size: 1.4rem;
    color: var(--ui7b-text-secondary);
    line-height: 1.6;
}

/* ===== GAME GRID ===== */
.ui7b-game-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(8.5rem, 1fr));
    gap: var(--ui7b-space-md);
    margin-bottom: var(--ui7b-space-lg);
}

.ui7b-game-card {
    background: linear-gradient(135deg, var(--ui7b-teal) 0%, var(--ui7b-dark) 100%);
    border-radius: var(--ui7b-radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: var(--ui7b-transition-base);
    border: 0.1rem solid rgba(32, 178, 170, 0.3);
}

.ui7b-game-card:active {
    transform: scale(0.97);
}

.ui7b-game-image-wrapper {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
}

.ui7b-game-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--ui7b-transition-base);
}

.ui7b-game-card:hover .ui7b-game-image {
    transform: scale(1.05);
}

.ui7b-game-badge {
    position: absolute;
    top: var(--ui7b-space-xs);
    right: var(--ui7b-space-xs);
    background: linear-gradient(135deg, var(--ui7b-primary) 0%, var(--ui7b-accent) 100%);
    color: var(--ui7b-dark);
    font-size: 1rem;
    font-weight: 700;
    padding: 0.2rem 0.6rem;
    border-radius: var(--ui7b-radius-sm);
    text-transform: uppercase;
}

.ui7b-game-name {
    padding: var(--ui7b-space-sm);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--ui7b-text-primary);
    text-align: center;
    line-height: 1.3;
    min-height: 3.6rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ===== FAQ ===== */
.ui7b-faq-list {
    display: flex;
    flex-direction: column;
    gap: var(--ui7b-space-md);
}

.ui7b-faq-item {
    background: linear-gradient(135deg, rgba(0, 77, 64, 0.3) 0%, rgba(14, 22, 33, 0.5) 100%);
    border-radius: var(--ui7b-radius-md);
    border: 0.1rem solid rgba(32, 178, 170, 0.2);
    overflow: hidden;
    transition: var(--ui7b-transition-base);
}

.ui7b-faq-item.ui7b-active {
    border-color: var(--ui7b-primary);
}

.ui7b-faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--ui7b-space-md);
    cursor: pointer;
    min-height: 4.4rem;
    gap: var(--ui7b-space-sm);
}

.ui7b-faq-question-text {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--ui7b-text-primary);
    flex: 1;
}

.ui7b-faq-icon {
    font-size: 2rem;
    color: var(--ui7b-primary);
    transition: transform var(--ui7b-transition-base);
    flex-shrink: 0;
}

.ui7b-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--ui7b-transition-base);
}

.ui7b-faq-answer-content {
    padding: 0 var(--ui7b-space-md) var(--ui7b-space-md);
    font-size: 1.4rem;
    color: var(--ui7b-text-secondary);
    line-height: 1.6;
}

/* ===== FOOTER ===== */
.ui7b-footer {
    background: linear-gradient(180deg, var(--ui7b-dark) 0%, var(--ui7b-teal) 100%);
    padding: var(--ui7b-space-xl) var(--ui7b-space-md) var(--ui7b-space-lg);
    border-top: 0.2rem solid var(--ui7b-primary);
    margin-bottom: 6rem;
}

.ui7b-footer-partners {
    margin-bottom: var(--ui7b-space-lg);
}

.ui7b-footer-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--ui7b-primary);
    text-align: center;
    margin-bottom: var(--ui7b-space-md);
}

.ui7b-partners-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--ui7b-space-sm);
    margin-bottom: var(--ui7b-space-md);
}

.ui7b-partner-logo {
    width: 100%;
    height: auto;
    opacity: 0.7;
    transition: var(--ui7b-transition-base);
    filter: grayscale(50%);
}

.ui7b-partner-logo:hover {
    opacity: 1;
    filter: grayscale(0%);
}

.ui7b-footer-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--ui7b-space-md);
    margin-bottom: var(--ui7b-space-lg);
    padding: var(--ui7b-space-md) 0;
    border-top: 0.1rem solid rgba(32, 178, 170, 0.2);
    border-bottom: 0.1rem solid rgba(32, 178, 170, 0.2);
}

.ui7b-footer-link {
    font-size: 1.3rem;
    color: var(--ui7b-text-secondary);
    transition: var(--ui7b-transition-fast);
}

.ui7b-footer-link:hover {
    color: var(--ui7b-primary);
}

.ui7b-footer-copyright {
    font-size: 1.2rem;
    color: var(--ui7b-text-muted);
    text-align: center;
}

/* ===== UTILITIES ===== */
.ui7b-text-center {
    text-align: center;
}

.ui7b-text-gradient {
    background: linear-gradient(135deg, var(--ui7b-primary) 0%, var(--ui7b-pale) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ui7b-divider {
    height: 0.1rem;
    background: linear-gradient(90deg, transparent 0%, var(--ui7b-primary) 50%, transparent 100%);
    margin: var(--ui7b-space-lg) 0;
}

.ui7b-highlight {
    color: var(--ui7b-primary);
    font-weight: 600;
}

.ui7b-badge {
    display: inline-block;
    padding: 0.4rem 0.8rem;
    font-size: 1.2rem;
    font-weight: 600;
    background: var(--ui7b-primary);
    color: var(--ui7b-dark);
    border-radius: var(--ui7b-radius-sm);
}

.ui7b-back-to-top {
    position: fixed;
    bottom: 8rem;
    right: 2rem;
    width: 4.4rem;
    height: 4.4rem;
    background: linear-gradient(135deg, var(--ui7b-primary) 0%, var(--ui7b-accent) 100%);
    color: var(--ui7b-dark);
    border-radius: var(--ui7b-radius-round);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--ui7b-transition-base);
    box-shadow: var(--ui7b-shadow-lg);
    z-index: var(--ui7b-z-sticky);
}

.ui7b-back-to-top.ui7b-visible {
    opacity: 1;
    visibility: visible;
}

/* ===== LOADING STATES ===== */
.ui7b-skeleton {
    background: linear-gradient(90deg, rgba(32, 178, 170, 0.1) 25%, rgba(32, 178, 170, 0.2) 50%, rgba(32, 178, 170, 0.1) 75%);
    background-size: 200% 100%;
    animation: ui7b-loading 1.5s ease-in-out infinite;
}

@keyframes ui7b-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 375px) {
    .ui7b-game-grid {
        grid-template-columns: repeat(auto-fill, minmax(7.5rem, 1fr));
        gap: var(--ui7b-space-sm);
    }

    .ui7b-partners-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 431px) {
    body {
        border-left: 0.1rem solid rgba(32, 178, 170, 0.2);
        border-right: 0.1rem solid rgba(32, 178, 170, 0.2);
    }
}