/*
 * නමෝ බුද්ධාය 🤍
 * Author: SHAN
 * File: Main Css File
 */

:root {
    /* Color System */
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #6366f1;
    --secondary: #06b6d4;
    --secondary-dark: #0891b2;
    --accent: #8b5cf6;
    --accent-light: #a78bfa;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;

    /* Background & Surface */
    --button-secondary: rgba(255, 255, 255, 0.15);
    --button-secondary-active: rgba(255, 255, 255, 0.06);
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: rgba(30, 41, 59, 0.7);
    --bg-glass: rgba(30, 41, 59, 0.4);
    --bg-gradient: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #0c4a6e 100%);

    /* Text Colors */
    --form-control: white;
    --nav-main: white;
    --text-primary: white;
    --text-secondary: white;
    --text-muted: #94a3b8;
    --text-inverse: #0f172a;

    /* Borders & Shadows */
    --border-color: rgba(148, 163, 184, 0.1);
    --border-radius-sm: 8px;
    --border-radius: 12px;
    --border-radius-lg: 20px;
    --border-radius-xl: 30px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(79, 70, 229, 0.3);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition: 0.3s ease;
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 5rem;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-gradient);
    background-attachment: fixed;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.wrapper {
    flex: 1;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Manrope', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}
h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}
h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}
h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-size: 1.1rem;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
    position: relative;
}
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}
.section-subtitle {
    color: var(--secondary);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}
.section-title {
    position: relative;
    display: inline-block;
    margin-bottom: var(--spacing-sm);
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 2px;
}

.gradient-text {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    display: inline-block;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--border-radius);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    outline: none;
    position: relative;
    overflow: hidden;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 12px 28px;
    border: none;
    border-radius: 10px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all .25s ease;
    box-shadow: 0 6px 18px rgba(79, 70, 229, 0.25);
    letter-spacing: 0.3px;
    outline: none;
}

.btn-primary:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: 0 12px 30px rgba(79, 70, 229, 0.35);
}

.btn-primary:active {
    transform: scale(.97);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.25);
}
.btn-secondary {
    background: var(--button-secondary);
    backdrop-filter: blur(10px);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.btn-secondary:hover {
    background: var(--button-secondary-active);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}
.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
}
.btn-icon:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Header Styles */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}
header.scrolled {
    padding: 15px 0;
    box-shadow: var(--shadow);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 1.5rem;
    color: var(--nav-main);
}
.logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: url('assets/logo.jpg') center/cover no-repeat;
    /* Remove gradient if you don't want it */
    /* background: linear-gradient(135deg, var(--primary), var(--secondary)); */
}

.logo-icon-img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    object-fit: cover;
    cursor: pointer;
}

/* Fullscreen overlay */
#fullscreen-viewer {
    position: fixed;
    top: 0;
    left: 0;

    width: 100vw;
    height: 100vh;

    display: flex;
    align-items: center;
    justify-content: center;

    background: rgba(0,0,0,0.55); /* dim background */
    backdrop-filter: blur(3px);

    visibility: hidden;
    opacity: 0;
    transition: opacity 0.25s ease;
    z-index: 9999;
}

#fullscreen-viewer.active {
    visibility: visible;
    opacity: 1;
}

#fullscreen-viewer img {
    max-width: 80vw;   /* responsive width */
    max-height: 80vh;  /* responsive height */
    border-radius: 15px;
    box-shadow: 0 0 25px rgba(0, 150, 255, 0.4);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

#fullscreen-viewer.active img {
    transform: scale(1);
}

nav ul {
    display: flex;
    gap: 30px;
}
nav a {
    position: relative;
    font-weight: 500;
    padding: 5px 0;
}
nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    transition: var(--transition);
}
nav a:hover::after,
nav a.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
/* Left side */
.hero {
    padding-top: 150px;
    padding-bottom: 100px;
    position: relative;
    overflow: hidden;
}
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}
.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at center, rgba(79, 70, 229, 0.1) 0%, transparent 70%);
    animation: pulse 15s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(0.8); opacity: 0.5; }
    100% { transform: scale(1.2); opacity: 0.8; }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(6, 182, 212, 0.1);
    color: var(--secondary);
    padding: 8px 16px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 20px;
    border: 1px solid rgba(6, 182, 212, 0.2);
}
.hero-actions {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}
.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

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

/* Main number styling */
.stat-number, .stat-numbe {
    font-size: 2.5rem;
    font-weight: 800;

    /* Gradient text */
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;

    line-height: 1;
    position: relative; /* needed for cursor effect */
}

/* Blinking cursor */
.stat-number::after {
    content: "";
    width: 3px;
    height: 70%;
    background: var(--primary);
    display: inline-block;
    margin-left: 3px;
    animation: blink 0.7s infinite;
}

@keyframes blink {
    50% {
        opacity: 0;
    }
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Right side */
.hero-visual {
    position: relative;
}

.floating-card {
    position: absolute;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
    width: 200px;
    z-index: 2;
    animation: float 6s ease-in-out infinite;
}
.floating-card:nth-child(1) {
    top: 10%;
    right: 10%;
    animation-delay: 0s;
}
.floating-card:nth-child(2) {
    bottom: 20%;
    left: 5%;
    animation-delay: 2s;
}
.floating-card:nth-child(3) {
    bottom: 10%;
    right: 5%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* Cards & Grids */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 30px;
    transition: var(--transition);
    height: 100%;
    position: relative;
    overflow: hidden;
}
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
}
.card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(79, 70, 229, 0.3);
}
.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
    font-size: 1.5rem;
}

.grid {
    display: grid;
    gap: 30px;
}
.grid-3 {
    grid-template-columns: repeat(3, 1fr);
}
.grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* Features Section */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}
.project-card {
    position: relative;
    overflow: hidden;
}
.project-image {
    height: 200px;
    width: 100%;
    object-fit: cover;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    transition: var(--transition);
}
.project-card:hover .project-image {
    transform: scale(1.05);
}
.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 15px;
}

.tag {
    padding: 4px 12px;
    background: rgba(79, 70, 229, 0.1);
    color: var(--primary-light);
    border-radius: 50px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Modal Base */
.project-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(6px);
    z-index: 9999;
}

/* Modal Content */
.project-modal-content {
    width: 90%;
    max-width: 700px;
    background: #0b0f29;
    padding: 25px;
    border-radius: 20px;
    animation: fadeUp 0.35s ease;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid rgba(255,255,255,0.1);
}

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

.project-modal-close {
    float: right;
    font-size: 2rem;
    cursor: pointer;
    color: white;
}

.project-modal-logo {
    width: 70px;
    height: 70px;
    border-radius: 12px;
    margin-bottom: 10px;
}

.project-modal-header h2 {
    margin: 10px 0 5px;
}

.project-modal-section {
    margin-top: 25px;
}

.project-modal-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.project-modal-images img {
    width: 100%;
    border-radius: 12px;
    margin-top: 10px;
    cursor: pointer;
    transition: 0.3s ease;
}

/* Zoom on screenshot */
.project-modal-images img:hover {
    transform: scale(1.02);
}

/* Research Section */
.research-highlight {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
    margin-bottom: 60px;
}
.research-visual {
    position: relative;
    height: 400px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
}
.research-visual::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.05)"/></svg>');
    background-size: cover;
}

/* Team Section */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}
.team-member {
    text-align: center;
}

.member-photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    position: relative;
    overflow: hidden;
}
.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Contact Form */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}
.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.form-group {
    margin-bottom: 20px;
}
.form-control {
    width: 100%;
    padding: 15px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--form-control);
    font-size: 1rem;
    transition: var(--transition);
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

textarea.form-control {
    min-height: 150px;
    resize: vertical;
}

/* Footer */
footer {
    background: var(--bg-secondary);
    padding: 60px 0 30px;
    margin-top: 60px;
    border-top: 1px solid var(--border-color);
    width: 100%;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}
.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    font-weight: 800;
    font-size: 1.5rem;
}
.footer-title {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}
.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: linear-gradient(to right, var(--primary), var(--secondary));
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    color: var(--text-secondary);
    transition: var(--transition);
}
.footer-links a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}
.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}
.social-link:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .research-highlight,
    .contact-container {
        grid-template-columns: 1fr;
    }
    .hero-content {
        grid-template-columns: 1fr;
    }
    .floating-card {
        display: none;
    }

    .nav-actions {
        display: visible;
    }

    .hide-on-pc {
        display: block;
    }

    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    nav ul {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: var(--bg-primary);
        flex-direction: column;
        padding: 20px;
        gap: 15px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        border-bottom: 1px solid var(--border-color);
        z-index: 999;
    }

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

    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .hero-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}
@media (max-width: 576px) {
    .section-title {
        font-size: 2rem;
    }
}
@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .section {
        padding: 60px 0;
    }

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

    .floating-card {
        position: relative;
        width: 100%;
        margin-bottom: 20px;
        animation: none;
    }
    
    .btn-primary {
        padding: 10px 20px;
        font-size: 0.9rem;
        border-radius: 8px;
    }

    .floating-card:nth-child(1),
    .floating-card:nth-child(2),
    .floating-card:nth-child(3) {
        position: relative;
        top: auto;
        left: auto;
        right: auto;
        bottom: auto;
    }
}

/* Utility Classes */
.hide-on-pc {
    display: none;
}

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

.mb-sm {
    margin-bottom: var(--spacing-sm);
}
.mb-md {
    margin-bottom: var(--spacing-md);
}
.mb-lg {
    margin-bottom: var(--spacing-lg);
}

.mt-sm {
    margin-top: var(--spacing-sm);
}
.mt-md {
    margin-top: var(--spacing-md);
}
.mt-lg {
    margin-top: var(--spacing-lg);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/*
 * God bless you 🤍
 */