/* ==========================================================================
   Aphelion Landing Page - Premium Design System & Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design System & CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Primary Colors */
    --color-primary: #1d53d4;
    --color-primary-dark: #123bb0;
    --color-primary-light: #e0ebff;
    
    /* Neutral Light Theme */
    --bg-page: #f7f9fc;
    --color-text-dark: #0c111d;
    --color-text-medium: #475467;
    --color-text-light: #667085;
    --border-light: rgba(226, 232, 240, 0.8);
    --shadow-premium: 0 16px 40px rgba(0, 0, 0, 0.03), 0 2px 10px rgba(0, 0, 0, 0.01);
    
    /* Left Card (Education) specific styling */
    --edu-bg: #ffffff;
    --edu-border: rgba(226, 232, 240, 0.8);
    
    /* Right Card (Technology) specific styling */
    --tech-bg: radial-gradient(circle at 100% 50%, #0a1329 0%, #040814 100%);
    --tech-border: rgba(255, 255, 255, 0.08);
    --tech-text-title: #ffffff;
    --tech-text-desc: #98a2b3;
    --tech-text-check: #d0d5dd;
    
    /* Transition Variables */
    --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    --transition-quick: all 0.2s ease;
}

/* --------------------------------------------------------------------------
   2. Base Settings & Resets
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-page);
    color: var(--color-text-medium);
    overflow-x: hidden;
    line-height: 1.6;
    position: relative;
}

.container {
    width: 100%;
    max-width: 1240px;
    margin-right: auto;
    margin-left: auto;
    padding-right: 24px;
    padding-left: 24px;
}

/* Background Top Decorative Glow */
.glow-bg-top {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 1400px;
    height: 600px;
    background: radial-gradient(circle at 50% -100px, rgba(29, 83, 212, 0.07) 0%, rgba(255, 255, 255, 0) 70%);
    z-index: -1;
    pointer-events: none;
}

/* --------------------------------------------------------------------------
   3. Header Section
   -------------------------------------------------------------------------- */
.site-header {
    width: 100%;
    padding-top: 12px;
    padding-bottom: 12px;
    position: relative;
    z-index: 100;
}

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

.logo-wrapper {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: var(--transition-quick);
}

.logo-wrapper:hover {
    opacity: 0.9;
}

.aphelion-logo {
    height: 46px;
    width: auto;
}

/* Navigation Menu */
.main-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    align-items: center;
    background: #ffffff;
    padding: 6px 10px;
    border-radius: 30px;
    border: 1px solid var(--border-light);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 10px 22px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-dark);
    text-decoration: none;
    transition: var(--transition-quick);
    border-radius: 20px;
}

.nav-link:hover {
    color: var(--color-primary);
    background-color: rgba(29, 83, 212, 0.04);
}

/* Active navigation item has vertical separator styling in image */
.nav-item.active .nav-link {
    color: var(--color-text-dark);
    font-weight: 600;
}

.nav-divider {
    width: 1px;
    height: 18px;
    background-color: #eaecf0;
    margin: 0 2px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 30px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text-dark);
    border: 1.5px solid var(--border-light);
}

.btn-outline:hover {
    background-color: var(--color-text-dark);
    color: #ffffff;
    border-color: var(--color-text-dark);
}

.btn-outline .arrow-icon {
    transition: var(--transition-smooth);
}

.btn-outline:hover .arrow-icon {
    transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   4. Hero Section
   -------------------------------------------------------------------------- */
.hero-section {
    padding-top: 18px;
    padding-bottom: 16px;
    text-align: center;
    position: relative;
}

.hero-container {
    max-width: 900px;
}

.hero-title {
    font-family: 'Outfit', sans-serif;
    font-size: 2.9rem;
    font-weight: 800;
    line-height: 1.15;
    color: var(--color-text-dark);
    letter-spacing: -1.5px;
    margin-bottom: 10px;
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.gradient-text {
    background: linear-gradient(135deg, #1d53d4 20%, #4338ca 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-light);
    font-weight: 400;
    max-width: 600px;
    margin: 0 auto;
    animation: fadeInUp 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.1s forwards;
}

/* --------------------------------------------------------------------------
   5. Portals Grid Section
   -------------------------------------------------------------------------- */
.portals-section {
    padding-bottom: 16px;
}

.portals-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    align-items: stretch;
}

/* Base Portal Card Styling */
.portal-card {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    padding: 28px 36px;
    min-height: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-shadow: var(--shadow-premium);
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition-smooth);
}

/* Custom Entry Class Triggered by JS */
.portal-card.fade-in-up {
    opacity: 1;
    transform: translateY(0);
}

.portal-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.06), 0 4px 20px rgba(0, 0, 0, 0.02);
}

/* Background Image Wrappers and Overlay Masking */
.card-bg-wrapper {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1;
    pointer-events: none;
}

.card-bg-image {
    position: absolute;
    top: 0;
    right: 0;
    height: 100%;
    width: 65%;
    object-fit: cover;
    object-position: left center;
    transition: var(--transition-smooth);
}

.portal-card:hover .card-bg-image {
    transform: scale(1.03);
}

/* Left Card (Education) Spec */
.education-card {
    background-color: var(--edu-bg);
    border: 1px solid var(--edu-border);
}

.card-bg-overlay-light {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to right, #ffffff 42%, rgba(255, 255, 255, 0.8) 55%, rgba(255, 255, 255, 0) 100%);
}

/* Right Card (Technology) Spec */
.technology-card {
    background: var(--tech-bg);
    border: 1px solid var(--tech-border);
}

.card-bg-overlay-dark {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to right, #040814 42%, rgba(4, 8, 20, 0.8) 55%, rgba(4, 8, 20, 0) 100%);
}

.technology-card:hover {
    box-shadow: 0 24px 60px rgba(29, 83, 212, 0.1), 0 4px 20px rgba(0, 0, 0, 0.1);
    border-color: rgba(29, 83, 212, 0.25);
}

/* Card Content Structure */
.card-content {
    position: relative;
    z-index: 2;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    max-width: 60%;
}

/* Circular Badges */
.icon-badge {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 14px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    transition: var(--transition-smooth);
}

.education-badge {
    background-color: var(--color-primary-light);
    color: var(--color-primary);
}

.technology-badge {
    background-color: rgba(29, 83, 212, 0.15);
    color: #3b82f6;
    border: 1px solid rgba(59, 130, 246, 0.3);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.2);
}

.portal-card:hover .icon-badge {
    transform: rotate(-8deg) scale(1.05);
}

.portal-card:hover .technology-badge {
    box-shadow: 0 0 25px rgba(59, 130, 246, 0.4);
}

/* Typography Inside Cards */
.card-title {
    font-family: 'Outfit', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.education-card .card-title {
    color: var(--color-text-dark);
}

.technology-card .card-title {
    color: var(--tech-text-title);
}

.card-description {
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 14px;
}

.education-card .card-description {
    color: var(--color-text-medium);
}

.technology-card .card-description {
    color: var(--tech-text-desc);
}

/* Checklists */
.card-checklist {
    list-style: none;
    width: 100%;
    margin-bottom: 18px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.88rem;
    font-weight: 500;
}

.education-card .checklist-item {
    color: var(--color-text-medium);
}

.technology-card .checklist-item {
    color: var(--tech-text-check);
}

.check-icon {
    flex-shrink: 0;
    transition: var(--transition-quick);
}

.education-card .check-icon {
    color: var(--color-primary);
}

.technology-card .check-icon {
    color: #2563eb;
    filter: drop-shadow(0 0 6px rgba(37, 99, 235, 0.5));
}

.portal-card:hover .check-icon {
    transform: scale(1.08);
}

/* Button CTAs inside Cards */
.btn-primary {
    background-color: var(--color-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    box-shadow: 0 4px 15px rgba(29, 83, 212, 0.3);
}

.btn-primary .arrow-icon {
    transition: var(--transition-smooth);
}

.btn-primary:hover .arrow-icon {
    transform: translateX(4px);
}

.btn-outline-light {
    background-color: transparent;
    color: #ffffff;
    border: 1.5px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(4px);
}

.btn-outline-light:hover {
    background-color: #ffffff;
    color: var(--color-text-dark);
    border-color: #ffffff;
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.15);
}

.btn-outline-light .arrow-icon {
    transition: var(--transition-smooth);
}

.btn-outline-light:hover .arrow-icon {
    transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   6. Feature Trust Badge Bar
   -------------------------------------------------------------------------- */
.trust-bar-section {
    padding-top: 8px;
    padding-bottom: 12px;
}

.trust-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: rgba(255, 255, 255, 0.85);
    border: 1px solid var(--border-light);
    border-radius: 16px;
    padding: 16px 40px;
    box-shadow: var(--shadow-premium);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.trust-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    flex: 1;
}

.trust-icon-wrapper {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: #f2f4f7;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-smooth);
}

.trust-icon-wrapper svg {
    transition: var(--transition-smooth);
}

.trust-item:hover .trust-icon-wrapper {
    background-color: var(--color-primary-light);
    transform: scale(1.05);
}

.trust-item:hover .trust-icon-wrapper svg {
    transform: rotate(6deg) scale(1.05);
}

.trust-text h3 {
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: 2px;
    letter-spacing: -0.1px;
}

.trust-text p {
    font-size: 0.76rem;
    line-height: 1.35;
    color: var(--color-text-light);
    font-weight: 400;
}

.trust-divider {
    width: 1px;
    height: 36px;
    background-color: #eaecf0;
    margin: 0 20px;
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   7. Footer Section
   -------------------------------------------------------------------------- */
.site-footer {
    margin-top: 48px;
    padding-top: 56px;
    padding-bottom: 32px;
    border-top: 1px solid var(--border-light);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.6) 0%, var(--bg-page) 100%);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 40px;
}

.footer-brand-col {
    max-width: 360px;
}

.footer-logo {
    display: inline-block;
    margin-bottom: 20px;
    text-decoration: none;
}

.footer-logo-svg {
    height: 48px;
    width: auto;
    display: block;
}

.footer-brand-desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.65;
    margin-bottom: 24px;
}

.footer-social-links {
    display: flex;
    gap: 10px;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--border-light);
    background: #ffffff;
    color: var(--color-text-medium);
    transition: var(--transition-quick);
    text-decoration: none;
}

.social-link:hover {
    color: var(--color-primary);
    border-color: var(--color-primary-light);
    background: var(--color-primary-light);
    transform: translateY(-2px);
}

.footer-col-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

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

.footer-links-list li {
    margin-bottom: 12px;
}

.footer-links-list a {
    font-size: 0.9rem;
    color: var(--color-text-light);
    text-decoration: none;
    transition: var(--transition-quick);
}

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

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

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

.footer-contact-item svg {
    flex-shrink: 0;
    margin-top: 2px;
    color: var(--color-primary);
}

.footer-contact-item a {
    color: var(--color-text-light);
    text-decoration: none;
    transition: var(--transition-quick);
}

.footer-contact-item a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding-top: 28px;
    border-top: 1px solid var(--border-light);
}

.copyright-text {
    font-size: 0.85rem;
    color: var(--color-text-light);
    font-weight: 500;
}

.footer-legal-links {
    display: flex;
    gap: 24px;
}

.footer-legal-links a {
    font-size: 0.85rem;
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-quick);
}

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

/* --------------------------------------------------------------------------
   8. Keyframe Animations
   -------------------------------------------------------------------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --------------------------------------------------------------------------
   9. Responsive Media Queries
   -------------------------------------------------------------------------- */

/* Medium Screens & Laptops (up to 1024px) */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .portals-grid {
        gap: 20px;
    }
    
    .portal-card {
        padding: 44px 36px;
    }
    
    .card-content {
        max-width: 70%;
    }
    
    .trust-bar {
        padding: 24px;
    }
    
    .trust-divider {
        margin: 0 16px;
    }

    .footer-grid {
        gap: 36px;
    }
}

/* Tablets (up to 768px) */
@media (max-width: 768px) {
    .site-header {
        padding-top: 15px;
        padding-bottom: 15px;
    }

    .main-nav {
        order: 3;
        width: 100%;
        justify-content: center;
    }

    .nav-list {
        width: 100%;
        justify-content: space-around;
        padding: 4px;
    }

    .nav-link {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .hero-section {
        padding-top: 30px;
        padding-bottom: 25px;
    }

    .hero-title {
        font-size: 2.5rem;
        margin-bottom: 15px;
    }

    .hero-subtitle {
        font-size: 1.05rem;
    }

    .portals-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .portal-card {
        min-height: 460px;
        padding: 40px;
    }

    .card-content {
        max-width: 80%;
    }

    .trust-bar {
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
        padding: 24px 32px;
    }

    .trust-item {
        flex: none;
    }

    .trust-divider {
        display: none;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .footer-brand-col {
        grid-column: 1 / -1;
        max-width: none;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* Mobile Screens (up to 480px) */
@media (max-width: 480px) {
    .nav-list {
        flex-wrap: wrap;
        border-radius: 16px;
    }

    .nav-link {
        font-size: 0.8rem;
        padding: 6px 10px;
    }

    .nav-divider {
        display: none;
    }

    .header-cta {
        width: 100%;
    }

    .btn {
        width: 100%;
    }

    .hero-title {
        font-size: 2.1rem;
        letter-spacing: -1px;
    }

    .portal-card {
        padding: 30px 24px;
        min-height: 480px;
    }

    .card-bg-image {
        width: 100%;
        opacity: 0.15; /* High transparency layout for small screens overlaying background text */
    }

    .education-card .card-bg-overlay-light {
        background: radial-gradient(circle, rgba(255,255,255,0.9) 30%, rgba(255,255,255,0.95) 100%);
    }

    .technology-card .card-bg-overlay-dark {
        background: radial-gradient(circle, rgba(4,8,20,0.9) 30%, rgba(4,8,20,0.95) 100%);
    }

    .card-content {
        max-width: 100%;
    }

    .card-title {
        font-size: 1.55rem;
    }

    .card-checklist {
        margin-bottom: 24px;
    }
    
    .checklist-item {
        font-size: 0.9rem;
    }

    .site-footer {
        margin-top: 32px;
        padding-top: 40px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
        padding-bottom: 28px;
    }

    .footer-legal-links {
        flex-direction: column;
        gap: 12px;
    }
}