/* --- Global Styles & Variables --- */
:root {
    --primary-color: #0052cc; /* Professional Blue */
    --secondary-color: #04295e; /* Dark Blue */
    --background-light: #f4f7fa;
    --text-color: #333;
    --text-light: #fff;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

body {
    font-family: 'Poppins', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

/* --- Typography --- */
h1, h2, h3 {
    font-weight: 600;
    color: var(--secondary-color);
}

h1 {
    font-size: 2.8rem;
    line-height: 1.2;
}

h2 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 40px;
}

p {
    margin-bottom: 1rem;
}

/* --- Header & Navigation --- */
header {
    background: var(--text-light);
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    padding: 1rem 5%;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    margin: 0;
    padding: 0;
}

nav a {
    text-decoration: none;
    color: var(--secondary-color);
    font-weight: 600;
    transition: color 0.3s ease;
}

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

/* --- Sections --- */
main {
    max-width: 1200px;
    margin: 0 auto;
}

/* 🔹 HERO SECTION WITH BACKGROUND IMAGE + ANIMATION (NEW) */
.hero {
    position: relative;                     /* NEW */
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 100px 20px;                    /* slightly taller hero */
    min-height: 80vh;                       /* more “landing page” feel */
    color: var(--text-light);               /* text on dark background */
    overflow: hidden;                       /* hide animated bg edges */
}

/* Background image + gradient overlay (NEW)
   Change url("images/hero-bg.jpg") to the real path of your image */
.hero::before {                             /* NEW */
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(
            rgba(144, 163, 189, 0.8),
            rgba(53, 110, 195, 0.8)
        ),
        url("images/Background1.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transform: scale(1.05);
    z-index: -1;
    animation: heroBgZoom 16s ease-in-out infinite alternate;
}

.hero-content {
    max-width: 800px;
    position: relative;                     /* sit above ::before */
    animation: fadeInUp 0.9s ease-out both; /* NEW */
}

.subtitle {
    font-size: 1.2rem;
    color: #e5eaf2;                         /* lighter on dark background */
    margin-top: 1rem;
}

/* --- Content Sections --- */
.content-section {
    padding: 60px 5%;
}

.bg-light {
    background-color: var(--background-light);
}

/* --- Buttons --- */
.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--text-light);
    padding: 12px 25px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    margin-top: 20px;
    transition: background-color 0.3s ease, transform 0.2s ease, box-shadow 0.2s ease; /* NEW: add shadow anim */
    box-shadow: 0 8px 18px rgba(0, 82, 204, 0.3);                                        /* NEW */
}

.cta-button:hover {
    background-color: var(--secondary-color);
    transform: translateY(-2px);
    box-shadow: 0 12px 25px rgba(0, 82, 204, 0.4);                                       /* NEW */
}

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

.feature-card {
    background: #fff;
    padding: 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

/* --- Contact Section --- */
#contact {
    text-align: center;
}

/* --- Footer --- */
footer {
    text-align: center;
    padding: 20px;
    background-color: var(--secondary-color);
    color: var(--text-light);
}

/* --- Simple Animations (NEW) --- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes heroBgZoom {
    from {
        transform: scale(1.05);
    }
    to {
        transform: scale(1.12);
    }
}

/* --- Responsive Design --- */
@media (max-width: 768px) {
    h1 {
        font-size: 2.2rem;
    }
    nav ul {
        display: none; /* Simple responsive hide for demo */
    }
    .hero {
        padding: 80px 20px;
        min-height: 70vh;
    }
}

/* Layout for nav right side */
.nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Theme toggle button */
.theme-toggle {
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 0.4rem 0.6rem;
    border-radius: 999px;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.theme-toggle:hover {
    background-color: rgba(148, 163, 184, 0.2);
    transform: translateY(-1px);
}

/* === DARK MODE OVERRIDES === */
body.dark-theme {
    --primary-color: #60a5fa;
    --secondary-color: #93c5fd;             /* lighter blue for headings */
    --background-light: #020617;
    --text-color: #e5e7eb;
    --text-light: #f9fafb;
    --box-shadow: 0 4px 16px rgba(0,0,0,0.6);

    background-color: #020617;
    color: var(--text-color);
}

/* Headings readable on dark */
body.dark-theme h1,
body.dark-theme h2,
body.dark-theme h3 {
    color: var(--text-light);
}

/* Subtitle slightly dimmer but readable */
body.dark-theme .subtitle {
    color: #cbd5f5;
}

/* ✅ Fix the “white box” issue */
body.dark-theme .bg-light {
    background-color: #020617;              /* no more bright white sections */
}

body.dark-theme .feature-card {
    background-color: #020617;              /* card background dark */
    color: var(--text-color);               /* text stays light */
    box-shadow: 0 6px 20px rgba(0,0,0,0.6); /* a bit more depth in dark mode */
    border: 1px solid #1f2937;
}

/* Header & footer also adapt */
body.dark-theme header {
    background: #020617;
    box-shadow: 0 2px 6px rgba(0,0,0,0.6);
}

body.dark-theme footer {
    background-color: #020617;
}