/* =============================================
   NEXT IDEA MATTERS - DESIGN SYSTEM
   ============================================= */

/* CSS Variables */
:root {
    /* Brand Colors */
    --color-primary-blue: #004B87;
    --color-orange: #F39C12;
    --color-turquoise: #1ABC9C;
    --color-red: #E74C3C;
    --color-purple: #9B59B6;
    --color-teal: #16A085;
    --color-yellow: #F1C40F;
    --color-pink: #E91E63;

    /* Neutrals */
    --color-white: #FFFFFF;
    --color-gray-50: #F9FAFB;
    --color-gray-100: #F3F4F6;
    --color-gray-200: #E5E7EB;
    --color-gray-300: #D1D5DB;
    --color-gray-600: #4B5563;
    --color-gray-800: #1F2937;
    --color-gray-900: #111827;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica', 'Arial', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* =============================================
   RESET & BASE STYLES
   ============================================= */

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

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

body {
    font-family: var(--font-primary);
    color: var(--color-gray-800);
    background-color: var(--color-gray-50);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* =============================================
   TYPOGRAPHY
   ============================================= */

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-600);
}

a {
    color: var(--color-primary-blue);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    opacity: 0.8;
}

/* =============================================
   LAYOUT
   ============================================= */

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-3xl) 0;
}

.section-sm {
    padding: var(--spacing-2xl) 0;
}

/* =============================================
   NAVIGATION
   ============================================= */

.nav {
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo img {
    height: 50px;
    width: auto;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    color: var(--color-gray-800);
    font-weight: 500;
    font-size: 0.95rem;
    padding: var(--spacing-xs) 0;
    border-bottom: 2px solid transparent;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--color-primary-blue);
    border-bottom-color: var(--color-orange);
}

.nav-link.active {
    color: var(--color-primary-blue);
    border-bottom-color: var(--color-orange);
}

.nav-cta {
    background: var(--color-orange);
    color: var(--color-white) !important;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-weight: 600;
    border: none;
}

.nav-cta:hover {
    background: #E67E22;
    opacity: 1;
}

/* Dropdown Menu */
.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-white);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    list-style: none;
    padding: var(--spacing-sm) 0;
    min-width: 280px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
    margin-top: var(--spacing-xs);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-gray-800);
    font-size: 0.9rem;
    text-decoration: none;
    transition: all 0.2s ease;
    border-left: 3px solid transparent;
}

.dropdown-menu a:hover {
    background: var(--color-gray-50);
    color: var(--color-primary-blue);
    border-left-color: var(--color-orange);
    padding-left: calc(var(--spacing-md) - 3px);
}

/* Mobile Menu Toggle */
.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-gray-800);
}

/* =============================================
   HERO SECTION
   ============================================= */

.hero {
    background: linear-gradient(135deg, rgba(0, 75, 135, 0.85) 0%, rgba(0, 102, 179, 0.85) 100%), url('images/what-is-nim-poster.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--color-white);
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-md);
}

.hero h1 {
    color: var(--color-white);
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

.hero .lead {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* =============================================
   BUTTONS
   ============================================= */

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: #E67E22;
    border-color: #E67E22;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-primary-blue);
    border-color: var(--color-white);
}

.btn-secondary:hover {
    background: var(--color-gray-50);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
    background: var(--color-primary-blue);
    color: var(--color-white);
}

/* =============================================
   CARDS
   ============================================= */

.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    height: 100%;
}

.card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

/* =============================================
   GRID LAYOUTS
   ============================================= */

.grid {
    display: grid;
    gap: var(--spacing-xl);
}

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

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* =============================================
   PAGE HEADER
   ============================================= */

.page-header {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    background: linear-gradient(135deg, rgba(0, 75, 135, 0.5) 0%, rgba(0, 102, 179, 0.5) 100%), url('images/hero/How it works hero bgd.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    color: var(--color-white);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.page-header .lead {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin: 0 auto;
}

.page-header-idea-tracks {
    background: linear-gradient(135deg, rgba(0, 75, 135, 0.3) 0%, rgba(0, 102, 179, 0.3) 100%), url('images/hero/idea tracks here bgd.jpeg');
    background-size: cover;
    background-position: center top;
    background-repeat: no-repeat;
    padding: var(--spacing-3xl) var(--spacing-md);
}

.page-header-for-schools {
    background: linear-gradient(135deg, rgba(0, 75, 135, 0.7) 0%, rgba(0, 102, 179, 0.7) 100%), url('images/hero/schools partners hero bdg.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.page-header-for-parents {
    background: linear-gradient(135deg, rgba(0, 75, 135, 0.5) 0%, rgba(0, 102, 179, 0.5) 100%), url('images/hero/parents hero page.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: var(--spacing-3xl) var(--spacing-md);
}

.page-header-pricing {
    background: linear-gradient(135deg, rgba(0, 75, 135, 0.85) 0%, rgba(0, 102, 179, 0.85) 100%), url('images/hero/pricing here page.jpeg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    padding: 8rem var(--spacing-md);
}

/* =============================================
   IDEA TRACKS - SPECIFIC STYLES
   ============================================= */

.tracks-intro {
    text-align: center;
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    line-height: 1.6;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.track-card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.track-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.track-logo {
    margin-bottom: var(--spacing-lg);
}

.track-logo h3 {
    font-size: 1.75rem;
    margin-bottom: 0;
}

.track-logo .track-name-top {
    color: var(--color-primary-blue);
    font-weight: 700;
}

.track-logo .track-name-bottom {
    font-weight: 700;
    display: block;
}

/* Track-specific colors */
.track-sustainable .track-name-bottom { color: var(--color-turquoise); }
.track-responsible .track-name-bottom { color: var(--color-orange); }
.track-probe .track-name-bottom { color: var(--color-orange); }
.track-research .track-name-bottom { color: var(--color-purple); }
.track-advocate .track-name-bottom { color: var(--color-red); }
.track-ecoplore .track-name-bottom { color: var(--color-teal); }
.track-venture .track-name-bottom { color: var(--color-yellow); }
.track-invent .track-name-bottom { color: #2196F3; }
.track-illuminate .track-name-bottom { color: var(--color-pink); }

.track-number {
    color: var(--color-yellow);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.track-subtitle {
    color: var(--color-primary-blue);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.track-description {
    color: var(--color-gray-600);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    flex-grow: 1;
}

.track-link {
    color: var(--color-primary-blue);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    align-self: flex-end;
    margin-left: auto;
}

.track-link:hover {
    gap: 0.75rem;
}

/* =============================================
   FOOTER
   ============================================= */

.footer {
    background: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-2xl) 0 var(--spacing-md);
}

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

.footer h4 {
    color: var(--color-white);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--spacing-xs);
}

.footer-links a {
    color: var(--color-gray-300);
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--color-orange);
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-800);
    padding-top: var(--spacing-md);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-gray-600);
}

/* =============================================
   RESPONSIVE DESIGN
   ============================================= */

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

    .nav-dropdown {
        position: static;
    }

    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: var(--color-gray-50);
        margin-top: var(--spacing-xs);
        margin-left: var(--spacing-md);
        border-radius: var(--radius-sm);
        min-width: auto;
    }

    .dropdown-menu a {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: 0.85rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero .lead {
        font-size: 1rem;
    }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.25rem; }
}

/* =============================================
   UTILITY CLASSES
   ============================================= */

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

.mb-0 { margin-bottom: 0 !important; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0 !important; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }