/* =========================================
   Global Variables & Reset
   ========================================= */
:root {
    --primary: #6b46c1;
    --primary-light: #a855f7;
    --primary-dark: #4c1d95;
    --secondary: #8b5cf6;
    --text: #1f2937;
    --text-light: #6b7280;
    --background: #f9fafb;
    --white: #ffffff;
    --border: #e5e7eb;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.6;
}

/* =========================================
   Navigation Bar (Global)
   ========================================= */
nav {
    background: var(--white);
    border-bottom: 1px solid var(--border);
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.nav-logo {
    font-weight: 800;
    font-size: 17px;
    color: var(--primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
    align-items: center;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    text-decoration: none;
    transition: color 0.2s;
}

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

.nav-cta {
    background: linear-gradient(135deg, rgba(107, 70, 193, 0.14), rgba(255, 255, 255, 0.72));
    color: var(--primary-dark);
    padding: 12px 24px;
    border-radius: 14px;
    font-size: 16px;
    font-weight: 800;
    text-decoration: none;
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.10);
    transition: transform 0.2s, box-shadow 0.2s, background 0.2s;
    display: inline-block;
    border: 1px solid rgba(107, 70, 193, 0.22);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(107, 70, 193, 0.18);
    background: linear-gradient(135deg, rgba(107, 70, 193, 0.18), rgba(255, 255, 255, 0.82));
}

.nav-cta::before {
    content: '';
    position: absolute;
    inset: -1px;
    background: radial-gradient(260px 120px at 20% 10%, rgba(255,255,255,0.55), transparent 62%),
                radial-gradient(220px 140px at 85% 20%, rgba(168,85,247,0.22), transparent 65%);
    pointer-events: none;
    mix-blend-mode: screen;
}

.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropbtn {
    background: none;
    border: none;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    padding: 0;
    font-family: inherit;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s;
}

.nav-dropdown:hover .nav-dropbtn,
.nav-dropdown:focus-within .nav-dropbtn,
.nav-dropdown.open .nav-dropbtn {
    color: var(--primary);
}

.nav-dropdown:hover .arrow,
.nav-dropdown:focus-within .arrow,
.nav-dropdown.open .arrow {
    transform: rotate(180deg);
}

.nav-dropdown-content {
    display: none;
    position: absolute;
    top: calc(100% + 12px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 10px;
    min-width: 300px;
    box-shadow: 0 16px 40px rgba(15,23,42,0.12);
    z-index: 100;
}

.nav-dropdown:hover .nav-dropdown-content,
.nav-dropdown:focus-within .nav-dropdown-content,
.nav-dropdown.open .nav-dropdown-content {
    display: block;
    animation: dropIn 0.15s ease;
}

@keyframes dropIn {
    from { opacity: 0; transform: translateX(-50%) translateY(-6px); }
    to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

.nav-dropdown-content a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-light);
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.15s;
}

.nav-dropdown-content a:hover {
    background: #f8fafc;
    color: var(--primary);
}

.nav-sep {
    height: 1px;
    background: var(--border);
    margin: 6px 0;
}

@media (max-width: 768px) {
    nav {
        padding: 12px 16px;
        flex-direction: column;
        align-items: flex-start;
    }
    .nav-links {
        width: 100%;
        margin-top: 12px;
        justify-content: space-between;
    }
}

/* =========================================
   Glass Buttons (Global)
   ========================================= */
.btn-glass {
    background: linear-gradient(135deg, rgba(107, 70, 193, 0.16), rgba(255, 255, 255, 0.78));
    color: var(--primary-dark);
    border: 1px solid rgba(107, 70, 193, 0.22);
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.10);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.btn-glass:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px rgba(107, 70, 193, 0.18);
    background: linear-gradient(135deg, rgba(107, 70, 193, 0.18), rgba(255, 255, 255, 0.86));
}

.btn-glass::before {
    content: '';
    position: absolute;
    inset: -1px;
    background:
        radial-gradient(260px 120px at 20% 10%, rgba(255,255,255,0.55), transparent 62%),
        radial-gradient(220px 140px at 85% 20%, rgba(168,85,247,0.22), transparent 65%);
    pointer-events: none;
    mix-blend-mode: screen;
}

/* =========================================
   Reveal Animations (Global)
   ========================================= */
.reveal-init { 
    opacity: 0; 
    transform: translateY(10px); 
}
.reveal-in { 
    opacity: 1; 
    transform: translateY(0); 
    transition: opacity 420ms ease, transform 420ms ease; 
}

@media (prefers-reduced-motion: reduce) {
    .reveal-init, .reveal-in { 
        opacity: 1; 
        transform: none; 
        transition: none; 
    }
    #back-to-top { 
        transition: none; 
    }
}

footer {
    background: var(--white);
    border-top: 1px solid var(--border);
    padding: 60px 20px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto 40px auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-section h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--text);
}

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

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: var(--text-light);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    color: var(--text-light);
    font-size: 14px;
}