/* --- Global Variables & Reset --- */
:root {
    --bg-color: #000000;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent-green: #27d494;
    --card-bg: #111827;
    --nav-bg: rgba(0, 0, 0, 0.95);
    --border-color: #1f2937;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- Navbar --- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 5%;
    background: var(--nav-bg);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    font-size: 24px;
    font-weight: 700;
    color: white;
    text-transform: lowercase;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 15px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    transition: 0.3s ease;
}

.nav-links a:hover {
    color: white;
}

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

.btn-signup {
    text-decoration: none;
    background: var(--accent-green);
    color: black;
    padding: 10px 20px;
    border-radius: 6px;
    font-weight: 600;
    font-size: 13px;
    transition: 0.3s;
}

.btn-signup:hover {
    box-shadow: 0 0 15px rgba(39, 212, 148, 0.4);
}

/* --- Hero --- */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: radial-gradient(circle at center top, #0c1a15 0%, #000000 80%);
    padding: 0 20px;
}

.main-title {
    font-size: clamp(2.2rem, 8vw, 4.5rem);
    line-height: 1.1;
    font-weight: 800;
    color: #4b5563;
    animation: slideDownFadeIn 1s ease-out forwards;
}

.human, .ai {
    color: white;
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.icon {
    width: 55px;
    height: 55px;
    color: var(--accent-green);
}

.sparkle {
    filter: drop-shadow(0 0 15px var(--accent-green));
}

.sub-text {
    margin-top: 35px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 750px;
    margin-left: auto;
    margin-right: auto;
}

.btn-main {
    display: inline-block;
    margin-top: 45px;
    text-decoration: none;
    border: 1px solid #334155;
    color: white;
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 8px;
    transition: 0.3s;
}

.btn-main:hover {
    border-color: var(--accent-green);
    background: rgba(39, 212, 148, 0.05);
}

/* --- Sections --- */
.content-section {
    padding: 120px 5%;
}

.section-heading {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.grid-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: 0.4s ease;
}

.grid-card:hover {
    transform: translateY(-10px);
    border-color: var(--accent-green);
}

.grid-card h3 {
    margin-bottom: 15px;
    color: var(--accent-green);
}

/* --- About & Buttons --- */
.about-section {
    padding: 120px 5%;
    display: flex;
    justify-content: center;
    background: linear-gradient(to bottom, #000, #08110e);
}

.about-content {
    max-width: 800px;
    text-align: center;
}

.about-content p {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.about-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn-secondary {
    text-decoration: none;
    border: 1px solid var(--accent-green);
    color: var(--accent-green);
    padding: 12px 35px;
    border-radius: 6px;
    font-weight: 600;
    transition: 0.3s;
}

.btn-secondary:hover {
    background: var(--accent-green);
    color: black;
}

/* --- Footer & Banner --- */
.footer {
    padding: 50px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: #4b5563;
    font-size: 0.9rem;
}

.cookie-banner {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: #111827;
    padding: 20px 35px;
    border-radius: 12px;
    width: 90%;
    max-width: 950px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--border-color);
    z-index: 2000;
}

.cookie-banner p { font-size: 13px; color: var(--text-secondary); max-width: 70%; }
.cookie-btns { display: flex; gap: 15px; }
.btn-decline { background: #374151; color: white; border: none; padding: 10px 20px; border-radius: 6px; cursor: pointer; }
.btn-accept { background: var(--accent-green); color: black; border: none; padding: 10px 20px; border-radius: 6px; font-weight: 600; cursor: pointer; }

/* --- Mobile Responsive --- */
@media (max-width: 1200px) {
    .nav-links { display: none; }
}

@media (max-width: 768px) {
    .main-title { font-size: 2.2rem; }
    .hero { height: auto; padding: 150px 20px 100px; }
    .about-btns { flex-direction: column; align-items: center; }
    .cookie-banner { flex-direction: column; text-align: center; gap: 20px; }
}

/* --- Animations --- */
@keyframes slideDownFadeIn {
    from {
        opacity: 0; /* මුලින් පේන්නේ නෑ */
        transform: translateY(-50px); /* පික්සල් 50ක් උඩින් පටන් ගන්නේ */
    }
    to {
        opacity: 1; /* අන්තිමට සම්පූර්ණයෙන් පේනවා */
        transform: translateY(0); /* නියමිත තැනට එනවා */
    }
}

.user-profile {
    background: rgba(255, 255, 255, 0.05);
    padding: 5px 15px;
    border-radius: 50px;
    backdrop-filter: blur(5px);
}

.nav-avatar {
    transition: transform 0.3s ease;
}

.nav-avatar:hover {
    transform: scale(1.1);
}

.user-profile-nav {
    background: rgba(255, 255, 255, 0.05);
    padding: 5px 12px;
    border-radius: 50px;
    transition: 0.3s;
    border: 1px solid transparent;
}

.user-profile-nav:hover {
    background: rgba(0, 255, 136, 0.1);
    border: 1px solid #00ff88;
}