/**
 * Lucky Game App - Main Stylesheet
 * Website: luckygameapp.club
 * CSS Class Prefix: saff-
 * Mobile-first design, max-width: 430px
 * Root font-size: 62.5% (10px base)
 */

/* ==================== CSS Variables ==================== */
:root {
    --saff-primary: #20B2AA;
    --saff-primary-dark: #1a9690;
    --saff-secondary: #34495E;
    --saff-bg-dark: #273746;
    --saff-bg-medium: #34495E;
    --saff-bg-light: #DCDCDC;
    --saff-text-light: #FAFAFA;
    --saff-text-dark: #273746;
    --saff-border: #BDC3C7;
    --saff-accent: #20B2AA;
    --saff-gold: #FFD700;
    --saff-red: #E74C3C;
    --saff-green: #2ECC71;
    --saff-shadow: rgba(0, 0, 0, 0.2);
    --saff-header-height: 60px;
    --saff-bottom-nav-height: 64px;
    --saff-border-radius: 8px;
    --saff-transition: all 0.3s ease;
}

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

html {
    font-size: 62.5%;
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    font-size: 1.6rem;
    line-height: 1.6;
    color: var(--saff-text-light);
    background-color: var(--saff-bg-dark);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.saff-no-scroll {
    overflow: hidden;
}

/* ==================== Typography ==================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin-bottom: 1rem;
}

h1 { font-size: 2.8rem; }
h2 { font-size: 2.4rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.8rem; }

p {
    margin-bottom: 1.5rem;
}

a {
    color: var(--saff-primary);
    text-decoration: none;
    transition: var(--saff-transition);
}

a:hover {
    color: var(--saff-text-light);
}

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

/* ==================== Header ==================== */
.saff-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--saff-header-height);
    background: linear-gradient(135deg, var(--saff-bg-medium) 0%, var(--saff-bg-dark) 100%);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.5rem;
    z-index: 1000;
    box-shadow: 0 2px 10px var(--saff-shadow);
    transition: var(--saff-transition);
}

.saff-header-scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.saff-logo {
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.saff-logo img {
    height: 36px;
    width: auto;
}

.saff-logo-text {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--saff-text-light);
}

.saff-logo-text span {
    color: var(--saff-primary);
}

.saff-header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.saff-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.8rem 1.6rem;
    font-size: 1.4rem;
    font-weight: 600;
    border: none;
    border-radius: var(--saff-border-radius);
    cursor: pointer;
    transition: var(--saff-transition);
    text-decoration: none;
}

.saff-btn-login {
    background: transparent;
    border: 2px solid var(--saff-primary);
    color: var(--saff-primary);
}

.saff-btn-login:hover {
    background: var(--saff-primary);
    color: var(--saff-text-light);
}

.saff-btn-register {
    background: linear-gradient(135deg, var(--saff-primary) 0%, var(--saff-primary-dark) 100%);
    color: var(--saff-text-light);
}

.saff-btn-register:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(32, 178, 170, 0.4);
}

.saff-menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--saff-text-light);
    font-size: 2.4rem;
    cursor: pointer;
    padding: 0.5rem;
}

/* ==================== Mobile Menu ==================== */
.saff-mobile-menu {
    position: fixed;
    top: 0;
    left: -280px;
    width: 280px;
    height: 100vh;
    background: var(--saff-bg-dark);
    z-index: 9999;
    transition: left 0.3s ease;
    overflow-y: auto;
    padding: 2rem;
}

.saff-menu-active {
    left: 0;
}

.saff-menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 9998;
    opacity: 0;
    visibility: hidden;
    transition: var(--saff-transition);
}

.saff-overlay-active {
    opacity: 1;
    visibility: visible;
}

.saff-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--saff-border);
}

.saff-menu-close {
    background: transparent;
    border: none;
    color: var(--saff-text-light);
    font-size: 2.4rem;
    cursor: pointer;
}

.saff-menu-nav {
    list-style: none;
}

.saff-menu-nav li {
    margin-bottom: 0.5rem;
}

.saff-menu-nav a {
    display: block;
    padding: 1.2rem 1rem;
    color: var(--saff-text-light);
    font-size: 1.5rem;
    border-radius: var(--saff-border-radius);
    transition: var(--saff-transition);
}

.saff-menu-nav a:hover {
    background: var(--saff-bg-medium);
    color: var(--saff-primary);
}

/* ==================== Main Content ==================== */
.saff-main {
    margin-top: var(--saff-header-height);
    min-height: calc(100vh - var(--saff-header-height));
}

/* ==================== Carousel/Slider ==================== */
.saff-carousel {
    position: relative;
    width: 100%;
    overflow: hidden;
    background: var(--saff-bg-dark);
}

.saff-slides {
    position: relative;
}

.saff-slide {
    display: none;
    width: 100%;
    animation: saffFadeIn 0.5s ease;
}

.saff-slide-active {
    display: block;
}

.saff-slide img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

@keyframes saffFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.saff-carousel-dots {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
}

.saff-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: var(--saff-transition);
}

.saff-dot-active {
    background: var(--saff-primary);
    transform: scale(1.2);
}

/* ==================== Sections ==================== */
.saff-section {
    padding: 3rem 1.5rem;
    background: var(--saff-bg-dark);
}

.saff-section-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--saff-primary);
}

.saff-section-title i {
    font-size: 2.4rem;
    color: var(--saff-primary);
}

.saff-section-title h2 {
    font-size: 2rem;
    color: var(--saff-text-light);
    margin-bottom: 0;
}

/* ==================== Game Grid ==================== */
.saff-game-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
}

.saff-game-card {
    position: relative;
    background: var(--saff-bg-medium);
    border-radius: var(--saff-border-radius);
    overflow: hidden;
    cursor: pointer;
    transition: var(--saff-transition);
}

.saff-game-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--saff-shadow);
}

.saff-game-card img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}

.saff-game-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(transparent, rgba(39, 55, 70, 0.95));
}

.saff-game-card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--saff-text-light);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.saff-game-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 50px;
    height: 50px;
    background: var(--saff-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--saff-text-light);
    font-size: 2rem;
    transition: var(--saff-transition);
    opacity: 0;
}

.saff-game-card:hover .saff-game-play-btn {
    transform: translate(-50%, -50%) scale(1);
    opacity: 1;
}

/* ==================== Features Section ==================== */
.saff-features {
    background: var(--saff-bg-medium);
    padding: 3rem 1.5rem;
}

.saff-features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.saff-feature-item {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--saff-bg-dark);
    border-radius: var(--saff-border-radius);
    transition: var(--saff-transition);
}

.saff-feature-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px var(--saff-shadow);
}

.saff-feature-icon {
    font-size: 3.5rem;
    color: var(--saff-primary);
    margin-bottom: 1rem;
}

.saff-feature-title {
    font-size: 1.6rem;
    color: var(--saff-text-light);
    margin-bottom: 0.5rem;
}

.saff-feature-desc {
    font-size: 1.3rem;
    color: var(--saff-border);
}

/* ==================== Promo Banner ==================== */
.saff-promo-banner {
    background: linear-gradient(135deg, var(--saff-primary) 0%, var(--saff-primary-dark) 100%);
    padding: 2.5rem 1.5rem;
    text-align: center;
}

.saff-promo-banner h3 {
    font-size: 2.2rem;
    color: var(--saff-text-light);
    margin-bottom: 1rem;
}

.saff-promo-banner p {
    font-size: 1.4rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 1.5rem;
}

.saff-promo-btn {
    display: inline-block;
    padding: 1.2rem 3rem;
    background: var(--saff-text-light);
    color: var(--saff-primary-dark);
    font-size: 1.6rem;
    font-weight: 700;
    border-radius: 50px;
    transition: var(--saff-transition);
}

.saff-promo-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

/* ==================== Why Choose Us ==================== */
.saff-why-choose {
    background: var(--saff-bg-dark);
}

.saff-why-list {
    list-style: none;
}

.saff-why-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--saff-bg-medium);
}

.saff-why-item:last-child {
    border-bottom: none;
}

.saff-why-icon {
    flex-shrink: 0;
    width: 45px;
    height: 45px;
    background: var(--saff-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--saff-text-light);
}

.saff-why-content h4 {
    font-size: 1.6rem;
    color: var(--saff-text-light);
    margin-bottom: 0.5rem;
}

.saff-why-content p {
    font-size: 1.3rem;
    color: var(--saff-border);
    margin-bottom: 0;
}

/* ==================== Bottom Navigation ==================== */
.saff-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--saff-bottom-nav-height);
    background: linear-gradient(180deg, var(--saff-bg-medium) 0%, var(--saff-bg-dark) 100%);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 1000;
    box-shadow: 0 -2px 15px var(--saff-shadow);
    border-top: 1px solid var(--saff-bg-medium);
}

.saff-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    min-height: 60px;
    padding: 0.5rem;
    color: var(--saff-border);
    text-decoration: none;
    transition: var(--saff-transition);
    cursor: pointer;
}

.saff-nav-item:hover,
.saff-nav-item.active {
    color: var(--saff-primary);
}

.saff-nav-item i {
    font-size: 2.4rem;
    margin-bottom: 0.3rem;
    transition: var(--saff-transition);
}

.saff-nav-item:hover i {
    transform: scale(1.15);
}

.saff-nav-item span {
    font-size: 1rem;
    font-weight: 500;
}

/* ==================== Footer ==================== */
.saff-footer {
    background: var(--saff-bg-medium);
    padding: 3rem 1.5rem 2rem;
    border-top: 1px solid var(--saff-border);
}

.saff-footer-partners {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--saff-bg-dark);
}

.saff-footer-partners h4 {
    font-size: 1.4rem;
    color: var(--saff-border);
    margin-bottom: 1.5rem;
}

.saff-partner-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
}

.saff-partner-logos img {
    height: 30px;
    opacity: 0.7;
    transition: var(--saff-transition);
}

.saff-partner-logos img:hover {
    opacity: 1;
}

.saff-footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.saff-footer-column h4 {
    font-size: 1.5rem;
    color: var(--saff-primary);
    margin-bottom: 1rem;
}

.saff-footer-column ul {
    list-style: none;
}

.saff-footer-column li {
    margin-bottom: 0.8rem;
}

.saff-footer-column a {
    color: var(--saff-border);
    font-size: 1.3rem;
}

.saff-footer-column a:hover {
    color: var(--saff-primary);
}

.saff-footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--saff-bg-dark);
}

.saff-footer-bottom p {
    font-size: 1.2rem;
    color: var(--saff-border);
    margin-bottom: 0.5rem;
}

/* ==================== Back to Top ==================== */
.saff-back-to-top {
    position: fixed;
    bottom: 80px;
    right: 15px;
    width: 45px;
    height: 45px;
    background: var(--saff-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--saff-text-light);
    font-size: 2rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: var(--saff-transition);
    z-index: 999;
    box-shadow: 0 3px 15px var(--saff-shadow);
}

.saff-visible {
    opacity: 1;
    visibility: visible;
}

.saff-back-to-top:hover {
    transform: translateY(-3px);
    background: var(--saff-primary-dark);
}

/* ==================== Help Pages ==================== */
.saff-help-hero {
    background: linear-gradient(135deg, var(--saff-bg-medium) 0%, var(--saff-bg-dark) 100%);
    padding: 3rem 1.5rem;
    text-align: center;
}

.saff-help-content {
    padding: 2rem 1.5rem;
}

.saff-help-content h2 {
    color: var(--saff-primary);
    margin-top: 2rem;
}

.saff-help-content ul {
    padding-left: 2rem;
    margin-bottom: 1.5rem;
}

.saff-help-content li {
    margin-bottom: 1rem;
    color: var(--saff-border);
}

/* ==================== Responsive Design ==================== */
@media (max-width: 430px) {
    html {
        font-size: 55%;
    }

    .saff-game-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.8rem;
    }

    .saff-features-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .saff-main {
        padding-bottom: 80px;
    }

    .saff-menu-toggle {
        display: block;
    }

    .saff-header-actions .saff-btn {
        padding: 0.6rem 1.2rem;
        font-size: 1.2rem;
    }

    .saff-bottom-nav {
        display: flex;
    }
}

@media (min-width: 769px) {
    .saff-bottom-nav {
        display: none;
    }

    .saff-section {
        padding: 4rem 2rem;
    }

    .saff-game-grid {
        grid-template-columns: repeat(6, 1fr);
    }

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

    .saff-footer-links {
        grid-template-columns: repeat(4, 1fr);
    }

    .saff-main {
        max-width: 1200px;
        margin-left: auto;
        margin-right: auto;
    }
}