/* ===================================
   NCC Training Portal - Main Stylesheet
   =================================== */

/* ===== CSS Variables ===== */
:root {
    /* Primary Colors */
    --ncc-green: #1a472a;
    --military-olive: #5a6f3e;
    --gold-accent: #d4af37;
    
    /* Secondary Colors */
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --dark-gray: #333333;
    --text-gray: #666666;
    
    /* Status Colors */
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    --info: #17a2b8;
    
    /* Typography */
    --font-heading: 'Roboto Slab', serif;
    --font-body: 'Open Sans', sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    
    /* Transitions */
    --transition: all 0.3s ease;
}

/* ===== Reset & Base Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: var(--white);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--ncc-green);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-gray);
}

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

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

ul {
    list-style: none;
}

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-md);
    cursor: pointer;
    border: 2px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
}

.btn i {
    margin-right: 0.5rem;
}

.btn-primary {
    background-color: var(--ncc-green);
    color: var(--white);
    border-color: var(--ncc-green);
}

.btn-primary:hover {
    background-color: var(--military-olive);
    border-color: var(--military-olive);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--military-olive);
    color: var(--white);
    border-color: var(--military-olive);
}

.btn-secondary:hover {
    background-color: var(--ncc-green);
    border-color: var(--ncc-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--white);
    border-color: var(--white);
}

.btn-outline:hover {
    background-color: var(--white);
    color: var(--ncc-green);
}

.btn-light {
    background-color: var(--white);
    color: var(--ncc-green);
    border-color: var(--white);
}

.btn-light:hover {
    background-color: var(--gold-accent);
    color: var(--dark-gray);
    border-color: var(--gold-accent);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* ===== Header & Navigation ===== */
.header {
    background-color: var(--ncc-green);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-img {
    width: 50px;
    height: 50px;
    object-fit: contain;
}

.logo-text h1 {
    font-size: 1.25rem;
    color: var(--white);
    margin: 0;
}

.logo-text p {
    font-size: 0.75rem;
    color: var(--gold-accent);
    margin: 0;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-menu a {
    color: var(--white);
    font-weight: 500;
    padding: 0.5rem 0;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--gold-accent);
    transition: var(--transition);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

.btn-login {
    background-color: transparent;
    border: 2px solid var(--white);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
}

.btn-login:hover {
    background-color: var(--white);
    color: var(--ncc-green);
}

.btn-register {
    background-color: var(--gold-accent);
    color: var(--dark-gray);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
}

.btn-register:hover {
    background-color: var(--white);
    color: var(--ncc-green);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--white);
    transition: var(--transition);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 600px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, var(--ncc-green) 0%, var(--military-olive) 100%);
    color: var(--white);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/hero-pattern.png') repeat;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 4rem 0;
}

.hero-title {
    font-size: 3rem;
    color: var(--white);
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--light-gray);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease 0.4s backwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== Section Styles ===== */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--text-gray);
}

/* ===== Features Section ===== */
.features {
    background-color: var(--light-gray);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    background: linear-gradient(135deg, var(--ncc-green), var(--military-olive));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 2rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.feature-card p {
    margin-bottom: 1.5rem;
}

.feature-list {
    text-align: left;
}

.feature-list li {
    padding: 0.5rem 0;
    color: var(--text-gray);
}

.feature-list i {
    color: var(--success);
    margin-right: 0.5rem;
}

/* ===== Statistics Section ===== */
.statistics {
    background: linear-gradient(135deg, var(--ncc-green) 0%, var(--military-olive) 100%);
    color: var(--white);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.stat-card {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.stat-card:hover {
    background-color: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--gold-accent);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 0.5rem;
}

.stat-card p {
    color: var(--light-gray);
    font-size: 1.1rem;
}

/* ===== Courses Preview Section ===== */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.course-card {
    background-color: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.course-image {
    position: relative;
    height: 200px;
    background-color: var(--light-gray);
    overflow: hidden;
}

.course-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.course-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
}

.course-badge.free {
    background-color: var(--success);
    color: var(--white);
}

.course-badge.popular {
    background-color: var(--gold-accent);
    color: var(--dark-gray);
}

.course-badge.advanced {
    background-color: var(--danger);
    color: var(--white);
}

.course-content {
    padding: 1.5rem;
}

.course-content h3 {
    margin-bottom: 0.75rem;
}

.course-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    color: var(--text-gray);
}

.course-meta i {
    margin-right: 0.25rem;
}

.course-stats {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    border-top: 1px solid var(--light-gray);
    border-bottom: 1px solid var(--light-gray);
    margin: 1rem 0;
    font-size: 0.9rem;
    color: var(--text-gray);
}

.course-stats i {
    margin-right: 0.25rem;
    color: var(--ncc-green);
}

.course-actions {
    display: flex;
    gap: 0.75rem;
}

.course-actions .btn {
    flex: 1;
}

/* ===== Updates Section ===== */
.updates {
    background-color: var(--light-gray);
}

.updates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.update-card {
    background-color: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.update-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.update-icon {
    width: 60px;
    height: 60px;
    background-color: var(--ncc-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.update-date {
    font-size: 0.85rem;
    color: var(--text-gray);
    margin-bottom: 1rem;
}

.update-card h3 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.update-link {
    color: var(--ncc-green);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.update-link:hover {
    color: var(--military-olive);
}

.update-link i {
    transition: var(--transition);
}

.update-link:hover i {
    transform: translateX(5px);
}

/* ===== CTA Section ===== */
.cta {
    background: linear-gradient(135deg, var(--military-olive) 0%, var(--ncc-green) 100%);
    color: var(--white);
    text-align: center;
    padding: 4rem 0;
}

.cta-content h2 {
    color: var(--white);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-content p {
    color: var(--light-gray);
    font-size: 1.25rem;
    margin-bottom: 2rem;
}

/* ===== Footer ===== */
.footer {
    background-color: var(--ncc-green);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-column h3 {
    color: var(--gold-accent);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.footer-column p {
    color: var(--light-gray);
    margin-bottom: 1rem;
}

.footer-column ul li {
    margin-bottom: 0.75rem;
}

.footer-column ul li a {
    color: var(--light-gray);
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: var(--gold-accent);
    padding-left: 5px;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-links a {
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--gold-accent);
    color: var(--dark-gray);
    transform: translateY(-3px);
}

.contact-info li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--light-gray);
    margin-bottom: 0.75rem;
}

.contact-info i {
    color: var(--gold-accent);
    width: 20px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom-content p {
    color: var(--light-gray);
    margin: 0;
}

.footer-bottom-links {
    display: flex;
    gap: 2rem;
}

.footer-bottom-links a {
    color: var(--light-gray);
    font-size: 0.9rem;
}

.footer-bottom-links a:hover {
    color: var(--gold-accent);
}

/* ===== Utility Classes ===== */
.text-center {
    text-align: center;
}

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

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

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }

.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

.pt-1 { padding-top: 1rem; }
.pt-2 { padding-top: 2rem; }
.pt-3 { padding-top: 3rem; }

.pb-1 { padding-bottom: 1rem; }
.pb-2 { padding-bottom: 2rem; }
.pb-3 { padding-bottom: 3rem; }