/* ====================================
   CSS Variables - Brand Colors from Logo
   ==================================== */
:root {
    /* Blue gradient from logo */
    --primary-light: #4FC3F7;
    --primary-medium: #2196F3;
    --primary-dark: #1565C0;
    --primary-darker: #0D47A1;
    --primary-darkest: #0A2647;

    /* Neutral colors */
    --white: #FFFFFF;
    --black: #000000;
    --gray-50: #F8F9FA;
    --gray-100: #F1F3F5;
    --gray-200: #E9ECEF;
    --gray-300: #DEE2E6;
    --gray-400: #CED4DA;
    --gray-500: #ADB5BD;
    --gray-600: #6C757D;
    --gray-700: #495057;
    --gray-800: #343A40;
    --gray-900: #212529;

    /* Semantic colors */
    --success: #28A745;
    --error: #DC3545;

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

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
}

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

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

body {
    font-family: var(--font-primary);
    color: var(--gray-900);
    line-height: 1.6;
    background: var(--white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* ====================================
   Typography
   ==================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-darkest);
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.75rem); }
h4 { font-size: 1.25rem; }

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

.lead {
    font-size: 1.25rem;
    font-weight: var(--font-weight-medium);
    color: var(--gray-700);
    line-height: 1.7;
}

/* ====================================
   Container & Layout
   ==================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

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

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-lg);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    margin-top: var(--spacing-sm);
}

/* ====================================
   Buttons
   ==================================== */
.btn-primary,
.btn-outline,
.btn-large {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: var(--font-weight-semibold);
    font-size: 1rem;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-medium);
    border: 2px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-medium), var(--primary-dark));
    color: var(--white);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-darker));
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

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

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

.btn-large {
    padding: 1.125rem 2.5rem;
    font-size: 1.125rem;
}

/* ====================================
   Navigation
   ==================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    padding: 1rem 0;
}

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

.logo img {
    height: 60px;
    width: auto;
    transition: var(--transition-medium);
}

.logo img:hover {
    transform: scale(1.05);
}

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

.nav-links a {
    color: var(--gray-700);
    font-weight: var(--font-weight-medium);
    transition: var(--transition-fast);
}

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

.nav-links a.btn-primary {
    color: var(--white) !important;
}

.nav-links a.btn-primary:hover {
    color: var(--white) !important;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    width: 28px;
    height: 3px;
    background: var(--primary-dark);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ====================================
   Hero Section
   ==================================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 100%);
    overflow: hidden;
}

.hero-gradient {
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, transparent 0%, rgba(33, 150, 243, 0.05) 100%);
    pointer-events: none;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-logo-large {
    margin-bottom: var(--spacing-md);
    animation: fadeInScale 1s ease-out;
}

.hero-logo-large img {
    width: 280px;
    height: auto;
}

.hero-title {
    color: var(--primary-darkest);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--gray-700);
    margin-bottom: var(--spacing-md);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
}

/* ====================================
   Problem Section
   ==================================== */
.problem-section {
    background: var(--white);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.problem-card {
    background: var(--gray-50);
    padding: var(--spacing-md);
    border-radius: 16px;
    transition: var(--transition-medium);
    border: 2px solid transparent;
}

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

.problem-card.highlight {
    background: linear-gradient(135deg, var(--primary-darkest), var(--primary-darker));
    color: var(--white);
    border-color: var(--primary-dark);
}

.problem-card.highlight h3,
.problem-card.highlight p {
    color: var(--white);
}

.problem-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.problem-card h3 {
    font-size: 1.375rem;
    margin-bottom: var(--spacing-sm);
}

.problem-card p {
    color: var(--gray-600);
    line-height: 1.7;
}

/* ====================================
   Solution Section
   ==================================== */
.solution-section {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--white) 50%, var(--gray-50) 100%);
}

.solution-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.solution-image img {
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.solution-features {
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.feature-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
}

.feature-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    color: var(--success);
}

.feature-text h4 {
    color: var(--primary-darkest);
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.feature-text p {
    color: var(--gray-600);
    margin: 0;
}

/* ====================================
   Use Cases Section
   ==================================== */
.usecases-section {
    background: var(--white);
}

.usecases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.usecase-card {
    background: linear-gradient(135deg, var(--gray-50), var(--white));
    padding: var(--spacing-md);
    border-radius: 12px;
    border-left: 4px solid var(--primary-medium);
    transition: var(--transition-medium);
}

.usecase-card:hover {
    border-left-color: var(--primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
}

.usecase-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-darkest);
}

.usecase-card p {
    color: var(--gray-600);
    margin: 0;
}

/* ====================================
   Logo Showcase Section
   ==================================== */
.logo-showcase-section {
    background: linear-gradient(135deg, var(--white) 0%, var(--gray-50) 50%, var(--white) 100%);
    padding: var(--spacing-xl) 0;
}

.logo-showcase {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.logo-showcase-image {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-lg);
}

.logo-showcase-image img {
    width: 100%;
    max-width: 400px;
    height: auto;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

.logo-meaning {
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.meaning-item {
    display: flex;
    gap: var(--spacing-sm);
    align-items: flex-start;
    padding: var(--spacing-sm);
    background: var(--white);
    border-radius: 12px;
    border-left: 4px solid var(--primary-medium);
    transition: var(--transition-medium);
}

.meaning-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
    border-left-color: var(--primary-dark);
}

.meaning-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.meaning-text h4 {
    color: var(--primary-darkest);
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.meaning-text p {
    color: var(--gray-600);
    margin: 0;
    line-height: 1.6;
}

/* ====================================
   About Section
   ==================================== */
.about-section {
    background: linear-gradient(135deg, var(--primary-darkest) 0%, var(--primary-darker) 100%);
    color: var(--white);
}

.about-section h2,
.about-section p {
    color: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image img {
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
}

/* ====================================
   Contact Section
   ==================================== */
.contact-section {
    background: var(--gray-50);
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.contact-benefits {
    margin-top: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.125rem;
    color: var(--gray-700);
}

.benefit-icon {
    font-size: 1.5rem;
}

.contact-form-wrapper {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: var(--font-weight-semibold);
    color: var(--gray-700);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 0.875rem;
    border: 2px solid var(--gray-300);
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-medium);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-message {
    padding: var(--spacing-sm);
    border-radius: 8px;
    margin-top: var(--spacing-sm);
    font-weight: var(--font-weight-medium);
}

.form-message.success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success);
    border: 2px solid var(--success);
}

.form-message.error {
    background: rgba(220, 53, 69, 0.1);
    color: var(--error);
    border: 2px solid var(--error);
}

/* ====================================
   Footer
   ==================================== */
.footer {
    background: var(--primary-darkest);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.footer-logo img {
    height: 60px;
    margin-bottom: var(--spacing-sm);
    filter: brightness(0) invert(1);
}

.footer h4 {
    color: var(--white);
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

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

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

.footer-contact a:hover {
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: var(--spacing-md);
    text-align: center;
    color: var(--gray-400);
}

/* ====================================
   Responsive Design
   ==================================== */

/* Tablet (iPad) */
@media (max-width: 1024px) {
    :root {
        --spacing-lg: 3rem;
        --spacing-xl: 4rem;
    }

    .hero-content,
    .solution-content,
    .about-content,
    .logo-showcase {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .hero-image,
    .solution-image,
    .about-image {
        order: -1;
    }

    .logo-showcase-image {
        order: -1;
        max-width: 300px;
        margin: 0 auto;
    }

    .hero-logo-large img {
        width: 200px;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .footer-logo {
        grid-column: 1 / -1;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --spacing-md: 1.5rem;
        --spacing-lg: 2.5rem;
        --spacing-xl: 3rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    section {
        padding: var(--spacing-lg) 0;
    }

    .navbar {
        padding: 0.75rem 0;
    }

    .logo img {
        height: 45px;
    }

    .hero-logo-large img {
        width: 180px;
    }

    .hero-logo-bg {
        width: 400px;
        height: 400px;
        opacity: 0.02;
    }

    .logo-showcase-image img {
        max-width: 250px;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: var(--spacing-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        transition: var(--transition-medium);
        gap: var(--spacing-sm);
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .hero {
        min-height: auto;
        padding-top: 100px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn-large {
        width: 100%;
    }

    .problem-grid,
    .usecases-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-links ul {
        align-items: center;
    }

    .footer-logo img {
        margin: 0 auto var(--spacing-sm);
    }
}

/* Small Mobile */
@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }

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

    .lead {
        font-size: 1.125rem;
    }
}

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

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.hero-content,
.section-header {
    animation: fadeInUp 0.8s ease-out;
}

/* ====================================
   Print Styles
   ==================================== */
@media print {
    .navbar,
    .mobile-menu-toggle,
    .hero-gradient {
        display: none;
    }

    section {
        page-break-inside: avoid;
    }
}