:root {
    /* Main Theme Colors */
    --primary-color-light: #2c3e50;
    --secondary-color-light: #3498db;
    --primary-color-dark: #3498db;
    --secondary-color-dark: #2c3e50;

    --accent-color: #e74c3c;
    --border-radius: 10px;

    /* Light Mode (Default) */
    --bg-color: #ffffff;
    --bg-secondary-color: #f4f6f9;
    --text-primary-color: #333;
    --text-secondary-color: #555;
    --card-bg-color: #ffffff;
    --border-color: #e0e0e0;
    --header-bg-color: rgba(44, 62, 80, 0.9);
    --hero-gradient: linear-gradient(135deg, #2c3e50, #34495e);
    --footer-bg-color: #2c3e50;
    --footer-text-color: #bdc3c7;
    --footer-header-color: #ffffff;
    --mobile-nav-bg: #34495e;
}

body.dark-mode {
    /* Dark Mode Variables */
    --bg-color: #121212;
    --bg-secondary-color: #1f2937;
    --text-primary-color: #f4f6f9;
    --text-secondary-color: #bdc3c7;
    --card-bg-color: #1f2937;
    --border-color: #34495e;
    --header-bg-color: rgba(31, 41, 55, 0.9);
    --hero-gradient: linear-gradient(135deg, #1f2937, #121212);
    --footer-bg-color: #1f2937;
    --footer-text-color: #bdc3c7;
    --footer-header-color: #f4f6f9;
    --mobile-nav-bg: #1f2937;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Hind Siliguri', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.8;
    color: var(--text-primary-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
header {
    background-color: var(--header-bg-color);
    color: white;
    padding: 0.8rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-size: 1.7rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
}

.logo i {
    color: var(--secondary-color-light);
}

body.dark-mode .logo i {
    color: var(--primary-color-dark);
}

nav ul {
    display: flex;
    list-style: none;
    align-items: center;
    margin: 0;
}

nav ul li {
    margin-left: 1.5rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    padding: 0.5rem 0;
}

.lang-switcher-li { margin-left: 2rem; }
.theme-switcher-li { margin-left: 0.8rem; }

.lang-btn, .theme-btn {
    background-color: transparent;
    color: white;
    border: 1px solid var(--secondary-color-light);
    padding: 0.4rem 0.9rem;
    border-radius: 20px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}
.theme-btn {
    font-size: 1rem;
    padding: 0.4rem 0.8rem;
}
.lang-btn:hover, .theme-btn:hover {
    background-color: var(--secondary-color-light);
    color: white;
}
body.dark-mode .lang-btn, body.dark-mode .theme-btn {
    border-color: var(--primary-color-dark);
}
body.dark-mode .lang-btn:hover, body.dark-mode .theme-btn:hover {
    background-color: var(--primary-color-dark);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.6rem;
    cursor: pointer;
    z-index: 1001;
}

/* Hero Section */
.hero {
    background: var(--hero-gradient);
    color: white;
    padding: 10rem 0 6rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    margin-top: 60px;
}

.hero-content { position: relative; z-index: 1; }
.hero h1 { font-size: 2.8rem; font-weight: 700; margin-bottom: 1rem; }
.hero p { font-size: 1.1rem; max-width: 700px; margin: 0 auto 2rem; min-height: 60px; }
#rotating-subtitle { transition: opacity 0.5s ease-in-out; }
#rotating-subtitle.fade-out { opacity: 0; }

.cta-button {
    display: inline-block;
    background-color: var(--secondary-color-light);
    color: white;
    padding: 0.8rem 2.2rem;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}
.cta-button:hover {
    background-color: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(41, 128, 185, 0.3);
}
body.dark-mode .cta-button {
    background-color: var(--primary-color-dark);
}
body.dark-mode .cta-button:hover {
    background-color: #5dade2;
}

/* General Section Styling */
section { padding: 5rem 0; }
section:nth-of-type(even) { background-color: var(--bg-secondary-color); }
.section-title { text-align: center; margin-bottom: 3rem; }
.section-title h2 {
    font-size: 2.3rem;
    color: var(--text-primary-color);
    margin-bottom: 1rem;
}
.section-title p {
    color: var(--text-secondary-color);
    max-width: 700px;
    margin: 0 auto;
    font-size: 1.1rem;
}

/* Features Section */
.features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.feature-card {
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    padding: 2.5rem 2rem;
    text-align: center;
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}
.feature-card:hover { transform: translateY(-10px); box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08); }
.feature-icon {
    font-size: 2.8rem;
    color: var(--secondary-color-light);
    margin-bottom: 1.5rem;
}
body.dark-mode .feature-icon { color: var(--primary-color-dark); }
.feature-card h3 { color: var(--text-primary-color); }
.feature-card p { color: var(--text-secondary-color); }

/* Trust Section */
.trust-section { background-color: var(--bg-color); }
.trust-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2rem; margin-top: 3rem; text-align: center; }
.trust-item i {
    font-size: 3rem;
    color: var(--secondary-color-light);
    margin-bottom: 1.5rem;
}
body.dark-mode .trust-item i { color: var(--primary-color-dark); }
.trust-item h3 { font-size: 1.3rem; color: var(--text-primary-color); margin-bottom: 0.5rem; }
.trust-item p { color: var(--text-secondary-color); }

/* Trading Education Section */
.education-tabs { display: flex; justify-content: center; margin-bottom: 2.5rem; flex-wrap: wrap; gap: 0.5rem; }
.tab-btn {
    padding: 0.7rem 1.5rem;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary-color);
    cursor: pointer;
    transition: all 0.3s;
}
.tab-btn.active { color: var(--secondary-color-light); border-bottom-color: var(--secondary-color-light); }
body.dark-mode .tab-btn.active { color: var(--primary-color-dark); border-bottom-color: var(--primary-color-dark); }

.tab-content { display: none; }
.tab-content.active { display: block; animation: fadeIn 0.5s ease-in-out; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

.education-grid, .gallery-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(350px, 1fr)); gap: 2rem; }
.education-card, .gallery-card {
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    border: 1px solid var(--border-color);
}
.education-card:hover, .gallery-card:hover { transform: translateY(-5px); box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1); }
.education-card h3, .gallery-card h3 { font-size: 1.4rem; margin-bottom: 1rem; color: var(--text-primary-color); display: flex; align-items: center; }
.education-card h3 i, .gallery-card h3 i {
    color: var(--secondary-color-light);
    margin-right: 10px;
    font-size: 1.2em;
}
body.dark-mode .education-card h3 i, body.dark-mode .gallery-card h3 i { color: var(--primary-color-dark); }
.education-card p, .gallery-card p { color: var(--text-secondary-color); flex-grow: 1; }

/* Resources Section */
.resources-list { max-width: 800px; margin: 0 auto; }
.resource-item {
    display: flex;
    align-items: center;
    padding: 1.2rem 1.5rem;
    margin-bottom: 1rem;
    background-color: var(--card-bg-color);
    border-radius: var(--border-radius);
    transition: all 0.3s;
    text-decoration: none;
    color: var(--text-primary-color);
    border: 1px solid var(--border-color);
}
.resource-item:hover { background-color: var(--bg-secondary-color); transform: translateX(10px); }
.resource-icon { font-size: 1.8rem; color: var(--secondary-color-light); margin-right: 1.5rem; min-width: 40px; text-align: center; }
body.dark-mode .resource-icon { color: var(--primary-color-dark); }

/* Risk Warning Section */
section.risk-warning {
    padding: 5rem 0;
    background-color: #1f2937;
}
.risk-warning .section-title h2,
.risk-warning .warning-item h3 {
    color: #f4f6f9;
}
.risk-warning .warning-item p,
.risk-warning .section-title p {
    color: #d1d5db;
}
.warning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}
.warning-item {
    background-color: rgba(255, 255, 255, 0.05);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 4px solid var(--accent-color);
}
.warning-item-header {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
}
.warning-item-icon {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-right: 1rem;
}

/* Footer */
footer { background-color: var(--footer-bg-color); color: var(--footer-text-color); padding: 4rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 2.5rem; margin-bottom: 3rem; }
.footer-column h3 { font-size: 1.3rem; margin-bottom: 1.5rem; color: var(--footer-header-color); }
.footer-column ul { list-style: none; padding: 0; }
.footer-column ul li a { color: var(--footer-text-color); text-decoration: none; transition: color 0.3s; }
.footer-column ul li a:hover { color: var(--primary-color-dark); }
.contact-icons { display: flex; gap: 1.5rem; }
.contact-icon-btn { font-size: 1.8rem; cursor: pointer; transition: color 0.3s; background: none; border: none; color: var(--footer-text-color); padding: 0; }
.contact-icon-btn:hover { color: var(--primary-color-dark); }
.social-links { display: flex; gap: 1rem; margin-top: 1.5rem; }
.social-links a { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; background-color: rgba(255, 255, 255, 0.1); border-radius: 50%; color: white; transition: all 0.3s; }
.social-links a:hover { background-color: var(--primary-color-dark); }
.footer-bottom { text-align: center; padding-top: 2rem; border-top: 1px solid rgba(255, 255, 255, 0.1); }

/* Modal/Popup Styles */
.modal { display: none; position: fixed; z-index: 2000; left: 0; top: 0; width: 100%; height: 100%; overflow-y: auto; background-color: rgba(0,0,0,0.6); animation: fadeInModal 0.3s; }
@keyframes fadeInModal { from { opacity: 0; } to { opacity: 1; } }
.modal-content {
    background-color: #fefefe; /* Always light background */
    color: #333; /* Always dark text */
    margin: 10% auto;
    padding: 30px;
    border: none;
    width: 90%;
    max-width: 600px;
    border-radius: var(--border-radius);
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    position: relative;
}
.close-btn { color: #aaa; position: absolute; top: 10px; right: 20px; font-size: 28px; font-weight: bold; background: none; border: none; cursor: pointer; }
.close-btn:hover { color: #000; }
.welcome-modal .modal-content { text-align: center; }

#contactModalBody { text-align: center; }
#contactModalBody i { font-size: 3rem; color: var(--secondary-color-light); margin-bottom: 1rem; }
#contactModalBody h3 { font-size: 1.5rem; color: #333; margin-bottom: 0.5rem; }
#contactModalBody p, #contactModalBody a { font-size: 1.1rem; color: #555; word-break: break-all; text-decoration: none; }
#contactModalBody a:hover { text-decoration: underline; }

/* Partner Change Page Styles */
#partner-change-section { padding-top: 120px; padding-bottom: 5rem; }
.partner-change-content { max-width: 800px; margin: 2rem auto 0; text-align: center; }
.partner-change-content .login-button { margin-bottom: 3rem; }
.info-card { background-color: var(--bg-secondary-color); border-radius: var(--border-radius); padding: 2rem; margin-bottom: 1.5rem; text-align: left; }
.info-card h3 { margin-bottom: 1rem; color: var(--text-primary-color); }
.copy-container { display: flex; gap: 10px; }
.copy-text { flex-grow: 1; padding: 0.7rem 1rem; border: 1px solid var(--border-color); border-radius: 5px; background-color: var(--bg-color); font-size: 1rem; color: var(--text-primary-color); }
.copy-btn {
    padding: 0.7rem 1.5rem;
    background-color: var(--secondary-color-light);
    color: white; border: none; border-radius: 5px; cursor: pointer;
    font-weight: 600; transition: background-color 0.3s;
}
.copy-btn:hover { background-color: #2980b9; }
body.dark-mode .copy-btn { background-color: var(--primary-color-dark); }
body.dark-mode .copy-btn:hover { background-color: #5dade2; }


/* Animation Classes */
.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: all 0.6s ease-out; }
.animate-on-scroll.animated { opacity: 1; transform: translateY(0); }


/* Premium Service Page Styles */
#premium-service-section {
    padding-top: 120px;
    padding-bottom: 5rem;
    background-color: var(--bg-color);
}
.premium-content {
    max-width: 900px;
    margin: 2rem auto 0;
}
.steps-main-title {
    text-align: center;
    font-size: 1.8rem;
    color: var(--text-primary-color);
    margin-bottom: 2.5rem;
    border-bottom: 2px solid var(--secondary-color-light);
    display: inline-block;
    padding-bottom: 0.5rem;
}
body.dark-mode .steps-main-title {
    border-bottom-color: var(--primary-color-dark);
}
.step-container {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
    margin-bottom: 3rem;
    background: var(--bg-secondary-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    border-left: 5px solid var(--secondary-color-light);
}
body.dark-mode .step-container {
    border-left-color: var(--primary-color-dark);
}
.step-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary-color-light);
    background-color: var(--bg-color);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
}
body.dark-mode .step-number {
    color: var(--primary-color-dark);
}
.step-details h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary-color);
}
.step-details p {
    color: var(--text-secondary-color);
    margin-bottom: 1.5rem;
}
.step-options-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}
.option-card {
    background: var(--bg-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}
.option-card h5 {
    font-size: 1.2rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary-color);
}
.option-card .cta-button {
    margin-top: 1rem;
}
.benefits-section {
    margin-top: 4rem;
    padding: 2.5rem;
    background: var(--bg-secondary-color);
    border-radius: var(--border-radius);
}
.benefits-title {
    text-align: center;
    font-size: 1.8rem;
    margin-bottom: 2rem;
    color: var(--text-primary-color);
}
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}
.benefit-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    background-color: var(--card-bg-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}
.benefit-icon {
    font-size: 2.5rem;
    color: var(--secondary-color-light);
}
body.dark-mode .benefit-icon {
    color: var(--primary-color-dark);
}
.benefit-content h4 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary-color);
}
.benefit-content p {
    font-size: 0.9rem;
    color: var(--text-secondary-color);
    line-height: 1.6;
}


/* Premium Nav Button Style */
.premium-nav-item {
    margin-left: 1rem; /* Adjusted margin */
    display: flex;
    align-items: center;
}
.cta-nav-button {
    background-color: var(--accent-color);
    color: white !important;
    padding: 0.5rem 1rem !important;
    border-radius: 20px;
    font-weight: 600;
    transition: all 0.3s;
    text-decoration: none;
    white-space: nowrap; /* Prevents button text from wrapping */
}
.cta-nav-button:hover {
    background-color: #c0392b;
    transform: translateY(-2px);
}

/* Responsive Styles */
@media (max-width: 1024px) {
    nav ul li { margin-left: 1rem; } /* Reduce spacing on smaller desktops */
    .premium-nav-item { margin-left: 0.5rem; }
    .lang-switcher-li { margin-left: 1rem; }
}

@media (max-width: 992px) {
    .mobile-menu-btn { display: block; }
    #mainNav { position: absolute; top: 100%; left: 0; width: 100%; background-color: var(--mobile-nav-bg); max-height: 0; overflow: hidden; transition: max-height 0.4s ease-in-out; }
    #mainNav.active { max-height: 100vh; } /* Changed from 500px to 100vh */
    nav ul { flex-direction: column; padding: 1rem 0; align-items: stretch; }
    nav ul li { margin: 0; }
    nav ul li a, .lang-switcher-li, .theme-switcher-li, .premium-nav-item { display: block; padding: 1rem; text-align: center; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
    .premium-nav-item { padding: 0.5rem 1rem; }
    .cta-nav-button { display: inline-block; width: auto; margin-top: 0.5rem; margin-bottom: 0.5rem; }
    .theme-switcher-li { border-bottom: none; }
    .lang-btn, .theme-btn { width: 50%; margin: 0.5rem auto; display: block; }
    .theme-switcher-li { padding: 0 1rem 1rem; }
}

@media (max-width: 768px) {
    .hero h1 { font-size: 2.2rem; }
    .modal-content { width: 90%; margin: 20vh auto; }
    .education-grid, .gallery-grid { grid-template-columns: 1fr; }
    /* Premium Page Responsive */
    .step-container {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .step-options-grid {
        grid-template-columns: 1fr;
    }
    .premium-nav-item { margin: 0; border-bottom: 1px solid rgba(255,255,255,0.1); padding: 1rem; }
    .cta-nav-button {
        display: inline-block;
        padding: 0.7rem 1.5rem !important;
    }
}