/* ------------------------------
   GLOBAL RESET + TYPOGRAPHY
--------------------------------*/
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
    transition: background 0.3s ease, color 0.3s ease;
}

/* ------------------------------
   HEADER + NAVIGATION
--------------------------------*/
header {
    background: linear-gradient(135deg, #1a73e8, #0f5ac6);
    color: white;
    padding: 40px 20px;
    text-align: center;
}

nav {
    background: white;
    padding: 14px 0;
    text-align: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

nav a {
    color: #1a73e8;
    margin: 0 18px;
    text-decoration: none;
    font-weight: 600;
    transition: opacity 0.3s ease, color 0.3s ease;
}

nav a:hover {
    opacity: 0.7;
}

/* ------------------------------
   HERO SECTION
--------------------------------*/
.hero {
    padding: 100px 20px;
    text-align: center;
    background: linear-gradient(135deg, #e9f0ff, #ffffff);
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 12px;
}

.hero p {
    font-size: 20px;
    color: #555;
}

/* ------------------------------
   SECTIONS + CARDS
--------------------------------*/
.section {
    max-width: 1000px;
    margin: 40px auto;
    padding: 40px;
    background: white;
    border-radius: 14px;
    box-shadow: 0 4px 14px rgba(0,0,0,0.06);
    transition: background 0.3s ease;
}

.card {
    background: white;
    padding: 24px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
    margin-bottom: 20px;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-4px);
}

/* ------------------------------
   CONTACT FORM
--------------------------------*/
.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 14px;
    margin: 12px 0;
    border-radius: 8px;
    border: 1px solid #ccc;
    font-size: 16px;
}

.contact-form button {
    background: #1a73e8;
    color: white;
    padding: 14px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: background 0.3s ease;
}

.contact-form button:hover {
    background: #0f5ac6;
}

/* ------------------------------
   FOOTER
--------------------------------*/
footer {
    background: #1a73e8;
    color: white;
    text-align: center;
    padding: 24px;
    margin-top: 40px;
}

/* ------------------------------
   DARK MODE
--------------------------------*/
body.dark {
    background: #121212;
    color: #e0e0e0;
}

body.dark nav {
    background: #1e1e1e;
    box-shadow: none;
}

body.dark .section,
body.dark .hero,
body.dark .card {
    background: #1e1e1e;
    box-shadow: 0 4px 14px rgba(255,255,255,0.05);
}

body.dark header {
    background: linear-gradient(135deg, #0f5ac6, #0a3f8a);
}

.dark-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: #1a73e8;
    color: white;
    padding: 12px 18px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}