/* 
   BlackjackProApp - Main Stylesheet
   Stile universale per l'intera piattaforma
*/

/* === RESET E VARIABILI === */
:root {
    /* Colori principali */
    --primary: #2e7d32;
    --primary-light: #60ad5e;
    --primary-dark: #005005;
    --secondary: #3f51b5;
    --secondary-light: #757de8;
    --secondary-dark: #002984;
    
    /* Colori neutrali */
    --dark: #212121;
    --medium-dark: #424242;
    --medium: #757575;
    --medium-light: #bdbdbd;
    --light: #f5f5f5;
    --white: #ffffff;
    
    /* Colori di stato */
    --success: #4caf50;
    --warning: #ff9800;
    --error: #f44336;
    --info: #2196f3;
    
    /* Typography */
    --font-primary: 'Roboto', 'Segoe UI', Arial, sans-serif;
    --font-secondary: 'Montserrat', 'Segoe UI', Arial, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Border Radius */
    --radius-sm: 3px;
    --radius-md: 6px;
    --radius-lg: 12px;
    --radius-circle: 50%;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
    --shadow-md: 0 3px 6px rgba(0, 0, 0, 0.16), 0 3px 6px rgba(0, 0, 0, 0.23);
    --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Reset di base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--light);
    min-height: 100vh;
}

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

a:hover {
    color: var(--primary-dark);
}

ul {
    list-style: none;
}

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

/* === LAYOUT === */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Grid system */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

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

.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

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

@media (max-width: 992px) {
    .grid-4 {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
}

/* === TIPOGRAFIA === */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    line-height: 1.3;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--dark);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.75rem;
}

h4 {
    font-size: 1.5rem;
}

h5 {
    font-size: 1.25rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--spacing-md);
}

.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

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

.text-secondary {
    color: var(--secondary);
}

.text-success {
    color: var(--success);
}

.text-error {
    color: var(--error);
}

.text-warning {
    color: var(--warning);
}

.text-info {
    color: var(--info);
}

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

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

.text-medium {
    color: var(--medium);
}

.text-bold {
    font-weight: 700;
}

.text-uppercase {
    text-transform: uppercase;
}

/* === HEADER E NAVIGAZIONE === */
header {
    background-color: var(--white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

#main-nav {
    padding: var(--spacing-md) 0;
}

#main-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

#main-nav .logo a {
    font-family: var(--font-secondary);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links li {
    margin-left: var(--spacing-lg);
}

.nav-links li a {
    color: var(--dark);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.nav-links li a:hover,
.nav-links li a.active {
    color: var(--primary);
}

.nav-links li a.login-link {
    color: var(--primary);
}

.nav-links li a.register-btn {
    background-color: var(--primary);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: background-color var(--transition-fast);
}

.nav-links li a.register-btn:hover {
    background-color: var(--primary-dark);
}

.burger {
    display: none;
    cursor: pointer;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: var(--dark);
    margin: 5px;
    transition: all var(--transition-medium);
}

@media (max-width: 768px) {
    .burger {
        display: block;
    }
    
    .nav-links {
        position: absolute;
        right: 0;
        top: 70px;
        background-color: var(--white);
        height: calc(100vh - 70px);
        width: 250px;
        flex-direction: column;
        align-items: center;
        justify-content: flex-start;
        padding-top: var(--spacing-xl);
        transform: translateX(100%);
        transition: transform var(--transition-medium);
        box-shadow: var(--shadow-md);
    }
    
    .nav-links li {
        margin: var(--spacing-md) 0;
    }
    
    .nav-active {
        transform: translateX(0%);
    }
    
    .toggle .line1 {
        transform: rotate(-45deg) translate(-5px, 6px);
    }
    
    .toggle .line2 {
        opacity: 0;
    }
    
    .toggle .line3 {
        transform: rotate(45deg) translate(-5px, -6px);
    }
}

/* === HERO SECTION === */
.hero {
    padding: var(--spacing-xxl) 0;
    background-color: var(--white);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.hero-content h1 {
    margin-bottom: var(--spacing-md);
    font-size: 2.75rem;
    color: var(--dark);
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    color: var(--medium-dark);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
}

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

.hero-image img {
    max-width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero-content {
        text-align: center;
        order: 1;
    }
    
    .hero-image {
        order: 0;
        margin-bottom: var(--spacing-lg);
    }
    
    .cta-buttons {
        justify-content: center;
    }
}

/* === BOTTONI === */
.btn {
    display: inline-block;
    font-weight: 500;
    text-align: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: var(--white);
}

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

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

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

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

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

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1.125rem;
}

.btn-icon {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--medium);
    font-size: 1.25rem;
    transition: color var(--transition-fast);
}

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

/* === SEZIONI === */
section {
    padding: var(--spacing-xxl) 0;
}

section:nth-child(even) {
    background-color: var(--white);
}

section:nth-child(odd) {
    background-color: var(--light);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

.section-header p {
    color: var(--medium);
    max-width: 700px;
    margin: 0 auto;
}

/* === FEATURES SECTION === */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.feature-card {
    background-color: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.feature-icon {
    margin-bottom: var(--spacing-md);
    font-size: 2.5rem;
    color: var(--primary);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.25rem;
}

.feature-card p {
    color: var(--medium);
    font-size: 0.95rem;
    margin-bottom: 0;
}

@media (max-width: 992px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* === PRICING SECTION === */
.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.price-card {
    background-color: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-lg);
    text-align: center;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--medium-light);
}

.price-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.price-card.featured {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: scale(1.05);
    z-index: 1;
}

.price-card.featured:hover {
    transform: scale(1.05) translateY(-5px);
}

.price-header {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--medium-light);
}

.price-header h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.5rem;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
}

.price span {
    font-size: 1rem;
    font-weight: 400;
    color: var(--medium);
}

.price-features {
    margin-bottom: var(--spacing-lg);
}

.price-features ul li {
    margin-bottom: var(--spacing-sm);
    color: var(--medium-dark);
}

.price-features ul li i {
    margin-right: var(--spacing-xs);
    color: var(--success);
}

.price-features ul li i.fa-times {
    color: var(--medium-light);
}

.price-card .btn {
    margin-top: auto;
}

@media (max-width: 992px) {
    .pricing-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .price-card.featured {
        grid-row: 1;
        grid-column: 1 / span 2;
    }
}

@media (max-width: 768px) {
    .pricing-cards {
        grid-template-columns: 1fr;
    }
    
    .price-card.featured {
        grid-column: 1;
    }
    
    .price-card, .price-card.featured {
        transform: none;
    }
    
    .price-card:hover, .price-card.featured:hover {
        transform: translateY(-5px);
    }
}

/* === TESTIMONIALS === */
.testimonials {
    background-color: var(--light);
}

.testimonial-slider {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.testimonial {
    background-color: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.testimonial-content p {
    font-style: italic;
    color: var(--medium-dark);
    margin-bottom: var(--spacing-md);
    position: relative;
}

.testimonial-content p::before {
    content: '\201C';
    font-size: 3rem;
    color: var(--medium-light);
    position: absolute;
    left: -25px;
    top: -10px;
    opacity: 0.3;
}

.testimonial-author {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.author-name {
    font-weight: 600;
    color: var(--dark);
}

.author-stars {
    color: #ffc107;
}

/* === AUTHENTICATION FORMS === */
.auth-section {
    min-height: calc(100vh - 300px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) 0;
}

.auth-container {
    background-color: var(--white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    width: 100%;
    max-width: 500px;
    padding: var(--spacing-xl);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.auth-header h2 {
    margin-bottom: var(--spacing-sm);
}

.auth-header p {
    color: var(--medium);
}

.auth-form form {
    display: flex;
    flex-direction: column;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--dark);
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"] {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--medium-light);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    transition: border-color var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
}

.form-group .password-hint {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: 0.75rem;
    color: var(--medium);
}

.forgot-password {
    text-align: right;
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

.remember-me {
    display: flex;
    align-items: center;
}

.remember-me input {
    margin-right: var(--spacing-xs);
}

.remember-me label {
    margin-bottom: 0;
    cursor: pointer;
}

.terms-checkbox {
    display: flex;
    align-items: flex-start;
}

.terms-checkbox input {
    margin-right: var(--spacing-xs);
    margin-top: 5px;
}

.terms-checkbox label {
    margin-bottom: 0;
    font-size: 0.875rem;
}

.form-error {
    color: var(--error);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    min-height: 20px;
}

.form-message {
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    min-height: 20px;
}

.form-message.success {
    color: var(--success);
}

.form-message.error {
    color: var(--error);
}

.auth-footer {
    margin-top: var(--spacing-lg);
    text-align: center;
    color: var(--medium);
    font-size: 0.9rem;
}

/* === FOOTER === */
footer {
    background-color: var(--dark);
    color: var(--light);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-logo h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.footer-logo p {
    color: var(--medium-light);
    font-size: 0.9rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.link-column h4 {
    color: var(--white);
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
}

.link-column ul li {
    margin-bottom: var(--spacing-xs);
}

.link-column ul li a {
    color: var(--medium-light);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.link-column ul li a:hover {
    color: var(--white);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    margin-bottom: 0;
    font-size: 0.8rem;
    color: var(--medium-light);
}

.social-links a {
    display: inline-block;
    color: var(--medium-light);
    margin-left: var(--spacing-sm);
    font-size: 1.2rem;
    transition: color var(--transition-fast);
}

.social-links a:hover {
    color: var(--white);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-logo {
        text-align: center;
        margin-bottom: var(--spacing-md);
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .link-column {
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column-reverse;
        text-align: center;
    }
    
    .social-links {
        margin-bottom: var(--spacing-md);
    }
    
    .social-links a {
        margin: 0 var(--spacing-xs);
    }
}

/* === UTILITIES === */
.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.pt-0 { padding-top: 0; }
.pt-1 { padding-top: var(--spacing-xs); }
.pt-2 { padding-top: var(--spacing-sm); }
.pt-3 { padding-top: var(--spacing-md); }
.pt-4 { padding-top: var(--spacing-lg); }
.pt-5 { padding-top: var(--spacing-xl); }

.pb-0 { padding-bottom: 0; }
.pb-1 { padding-bottom: var(--spacing-xs); }
.pb-2 { padding-bottom: var(--spacing-sm); }
.pb-3 { padding-bottom: var(--spacing-md); }
.pb-4 { padding-bottom: var(--spacing-lg); }
.pb-5 { padding-bottom: var(--spacing-xl); }

.hidden { display: none; }
.visible { display: block; }

.clearfix::after {
    content: "";
    clear: both;
    display: table;
}

/* Animazioni */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.fade-in {
    animation: fadeIn var(--transition-medium);
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.slide-up {
    animation: slideUp var(--transition-medium);
}

/* === RESPONSIVE ADJUSTMENTS === */
@media (max-width: 1200px) {
    .container {
        max-width: 992px;
    }
}

@media (max-width: 992px) {
    .container {
        max-width: 768px;
    }
    
    h1 {
        font-size: 2.25rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
}

@media (max-width: 768px) {
    .container {
        max-width: 576px;
    }
    
    h1 {
        font-size: 2rem;
    }
    
    section {
        padding: var(--spacing-xl) 0;
    }
}

@media (max-width: 576px) {
    .container {
        max-width: 100%;
        padding: 0 var(--spacing-md);
    }
    
    h1 {
        font-size: 1.75rem;
    }
    
    h2 {
        font-size: 1.5rem;
    }
}

/* === LOADING SPINNER === */
.loading {
    position: relative;
    opacity: 0.7;
    pointer-events: none;
}

.loading-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    z-index: 10;
}

.loading-spinner div {
    box-sizing: border-box;
    display: block;
    position: absolute;
    width: 32px;
    height: 32px;
    margin: 4px;
    border: 4px solid var(--primary);
    border-radius: 50%;
    animation: loading-spinner 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    border-color: var(--primary) transparent transparent transparent;
}

.loading-spinner div:nth-child(1) {
    animation-delay: -0.45s;
}

.loading-spinner div:nth-child(2) {
    animation-delay: -0.3s;
}

.loading-spinner div:nth-child(3) {
    animation-delay: -0.15s;
}

@keyframes loading-spinner {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}