/* ==================== CSS Variables & Theme ==================== */
:root {
    --primary-hue: 220;
    --accent-hue: 210;

    /* Light theme colors */
    --bg-primary: hsl(0, 0%, 98%);
    --bg-secondary: hsl(0, 0%, 100%);
    --bg-tertiary: hsl(var(--primary-hue), 20%, 96%);
    --text-primary: hsl(var(--primary-hue), 20%, 15%);
    --text-secondary: hsl(var(--primary-hue), 10%, 40%);
    --text-tertiary: hsl(var(--primary-hue), 8%, 60%);
    --border-color: hsl(var(--primary-hue), 15%, 88%);
    --shadow-color: hsla(var(--primary-hue), 30%, 20%, 0.08);
    --shadow-hover: hsla(var(--primary-hue), 30%, 20%, 0.15);

    /* Accent colors */
    --accent-primary: hsl(var(--accent-hue), 70%, 55%);
    --accent-secondary: hsl(var(--accent-hue), 70%, 65%);
    --accent-gradient: linear-gradient(135deg, hsl(var(--accent-hue), 70%, 55%), hsl(calc(var(--accent-hue) + 20), 70%, 60%));

    /* Header */
    --header-bg: hsla(0, 0%, 100%, 0.85);
    --header-shadow: 0 2px 20px var(--shadow-color);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* Dark theme */
[data-theme="dark"] {
    --bg-primary: hsl(var(--primary-hue), 20%, 12%);
    --bg-secondary: hsl(var(--primary-hue), 18%, 16%);
    --bg-tertiary: hsl(var(--primary-hue), 16%, 20%);
    --text-primary: hsl(0, 0%, 98%);
    --text-secondary: hsl(0, 0%, 85%);
    --text-tertiary: hsl(0, 0%, 70%);
    --border-color: hsl(var(--primary-hue), 15%, 28%);
    --shadow-color: hsla(0, 0%, 0%, 0.4);
    --shadow-hover: hsla(0, 0%, 0%, 0.6);
    --header-bg: hsla(var(--primary-hue), 18%, 16%, 0.9);
    --accent-primary: hsl(var(--accent-hue), 75%, 65%);
    --accent-secondary: hsl(var(--accent-hue), 75%, 75%);
}

/* ==================== Base Styles ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    overflow-x: hidden;
}

/* ==================== Fixed Header ==================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--header-shadow);
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.logo a:hover {
    transform: scale(1.02);
}

.logo-icon {
    width: 24px;
    height: 24px;
    object-fit: contain;
    transition: all var(--transition-fast);
}

.logo a:hover .logo-icon {
    transform: rotate(5deg);
    filter: drop-shadow(0 2px 8px hsla(var(--accent-hue), 70%, 55%, 0.4));
}

.logo-text {
    font-size: 1.5rem;
    font-family: 'Outfit', sans-serif;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.logo-highlight {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: color var(--transition-fast);
    padding: 0.5rem 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* Dropdown Menu Styles */
.nav-dropdown {
    position: relative;
}

.nav-dropdown .nav-link {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.dropdown-icon {
    transition: transform var(--transition-fast);
}

.nav-dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--header-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.5rem 0;
    min-width: 250px;
    box-shadow: 0 10px 40px var(--shadow-hover);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(10px);
    transition: all var(--transition-normal);
    list-style: none;
    margin-top: 0.5rem;
    z-index: 1001;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    position: relative;
}

.dropdown-menu a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 0;
    background: var(--accent-gradient);
    transition: height var(--transition-fast);
}

.dropdown-menu a:hover {
    color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.dropdown-menu a:hover::before {
    height: 60%;
}

/* Theme Toggle Button */
.theme-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

.theme-toggle:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    transform: scale(1.05);
}

.theme-toggle:hover .theme-icon {
    color: white;
}

.theme-icon {
    position: absolute;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.sun-icon {
    opacity: 1;
    transform: rotate(0deg);
}

.moon-icon {
    opacity: 0;
    transform: rotate(180deg);
}

[data-theme="dark"] .sun-icon {
    opacity: 0;
    transform: rotate(180deg);
}

[data-theme="dark"] .moon-icon {
    opacity: 1;
    transform: rotate(0deg);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 3px;
    transition: all var(--transition-fast);
}

/* ==================== Main Content ==================== */
.main-content {
    margin-top: 80px;
    min-height: calc(100vh - 80px);
}

/* ==================== Footer ==================== */
.main-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem 1.5rem;
    margin-top: 4rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-section h4 {
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.footer-section p {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--accent-primary);
}

/* Social Media Section */
.footer-social {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.footer-social h4 {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.social-links {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.social-icon:hover {
    background: var(--accent-gradient);
    border-color: var(--accent-primary);
    color: white;
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 6px 20px hsla(var(--accent-hue), 70%, 55%, 0.4);
}

.social-icon svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
    font-size: 0.9rem;
    margin-top: 2rem;
}

/* ==================== Responsive Design ==================== */
@media (max-width: 768px) {
    .nav-container {
        padding: 1rem;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--header-bg);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 2rem;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
        box-shadow: 0 10px 30px var(--shadow-color);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-links {
        flex-direction: column;
        gap: 1.5rem;
        width: 100%;
        align-items: stretch;
    }

    .nav-links>li {
        width: 100%;
    }

    .nav-link {
        font-size: 1.1rem;
        width: 100%;
        text-align: left;
    }

    /* Mobile dropdown styles - simple and clean */
    .nav-dropdown .dropdown-menu {
        position: static;
        left: auto;
        right: auto;
        transform: none;
        opacity: 0;
        visibility: hidden;
        max-height: 0;
        overflow: hidden;
        box-shadow: none;
        border: none;
        background: transparent;
        padding: 0;
        margin: 0;
        display: block;
        transition: all 0.3s ease;
        list-style: none;
        width: 100%;
    }

    .nav-dropdown.active .dropdown-menu,
    .nav-dropdown:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        max-height: 800px;
        padding: 0.5rem 0 0 1.5rem;
        margin-top: 0.5rem;
        transform: none;
    }

    .dropdown-menu li {
        list-style: none;
        margin: 0.25rem 0;
    }

    .dropdown-menu a {
        display: block;
        padding: 0.5rem 0;
        font-size: 0.95rem;
        color: var(--text-secondary);
        text-decoration: none;
        transition: color 0.2s ease;
    }

    .dropdown-menu a::before {
        display: none;
    }

    .dropdown-menu a:hover {
        color: var(--accent-primary);
    }

    .nav-dropdown .dropdown-icon {
        transition: transform 0.3s ease;
        margin-left: 0.5rem;
    }

    .nav-dropdown.active .dropdown-icon {
        transform: rotate(180deg);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

/* ==================== Utility Classes ==================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 4rem 0;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 15px hsla(var(--accent-hue), 70%, 55%, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px hsla(var(--accent-hue), 70%, 55%, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

/* ==================== Modal Styles ==================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 1rem;
}

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

.modal-content {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 3rem 2.5rem;
    max-width: 500px;
    width: 100%;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s ease;
    text-align: center;
    border: 1px solid var(--border-color);
}

.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-secondary);
}

.modal-close:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
    transform: rotate(90deg);
}

.modal-icon {
    width: 60px;
    height: 60px;
    background: var(--accent-gradient);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
}

.modal-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
}

.modal-icon.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
}

.modal-title.success {
    color: #10b981;
}

.modal-title.error {
    color: #ef4444;
}

.modal-content h2,
.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.modal-content>p,
.modal-message {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-size: 1.1rem;
    line-height: 1.5;
}

.modal-content .btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.modal-note {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    margin-top: 1.5rem;
}

.text-link {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease;
}

.text-link:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .modal-content {
        padding: 1.5rem 1.2rem;
    }

    .modal-content h2 {
        font-size: 1.4rem;
    }

    .modal-icon {
        width: 60px;
        height: 60px;
    }
}