/* ===== CSS Variables ===== */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-primary-light: #3b82f6;
    --color-secondary: #64748b;
    --color-text: #1e293b;
    --color-text-light: #64748b;
    --color-text-muted: #94a3b8;
    --color-bg: #ffffff;
    --color-bg-alt: #f8fafc;
    --color-border: #e2e8f0;
    --color-border-light: #f1f5f9;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    --border-radius: 0.5rem;
    --border-radius-lg: 0.75rem;
    --border-radius-xl: 1rem;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
}

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

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

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

.section {
    padding: var(--spacing-4xl) 0;
}

/* ===== Header & Navigation ===== */
.header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

.nav {
    padding: var(--spacing-md) 0;
}

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

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: var(--spacing-2xl);
    align-items: center;
}

.nav-link {
    font-weight: 500;
    color: var(--color-text-light);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-primary);
    border-radius: 1px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.nav-toggle .bar {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: var(--transition-fast);
}

/* ===== Button Styles ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--font-size-base);
    font-weight: 500;
    text-decoration: none;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
    justify-content: center;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
    color: white;
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-bg-alt);
    color: var(--color-text);
}

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

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

.btn-submit {
    width: 100%;
    position: relative;
}

.btn-loader {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== Hero Section ===== */
.hero {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.hero-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
}

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

/* ===== Page Hero ===== */
.page-hero {
    padding: var(--spacing-4xl) 0 var(--spacing-2xl);
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    text-align: center;
}

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

.page-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.page-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
}

/* ===== Features Section ===== */
.features {
    padding: var(--spacing-4xl) 0;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

.feature {
    text-align: center;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

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

.feature-icon {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.feature-title {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

.feature-description {
    color: var(--color-text-light);
}

/* ===== Projects Section ===== */
.projects {
    padding: var(--spacing-4xl) 0;
}

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

.project-card {
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.project-card.featured {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, var(--color-bg) 0%, #f8faff 100%);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
}

.project-icon {
    color: var(--color-primary);
}

.project-meta {
    display: flex;
    gap: var(--spacing-sm);
}

.project-status,
.project-type {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.project-status {
    background-color: var(--color-success);
    color: white;
}

.project-type {
    background-color: var(--color-bg-alt);
    color: var(--color-text-light);
}

.project-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
}

.project-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xl);
}

.project-features,
.project-tech,
.project-impact {
    margin-bottom: var(--spacing-xl);
}

.project-features h3,
.project-tech h3,
.project-impact h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}

.project-features ul {
    list-style: none;
    padding-left: 0;
}

.project-features li {
    padding: var(--spacing-sm) 0;
    color: var(--color-text-light);
    position: relative;
    padding-left: var(--spacing-lg);
}

.project-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: bold;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.tech-tag {
    background-color: var(--color-bg-alt);
    color: var(--color-text-light);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.project-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.coming-soon {
    background-color: var(--color-bg-alt);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-3xl);
    text-align: center;
}

.coming-soon-icon {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.coming-soon h3 {
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.coming-soon p {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* ===== About Section ===== */
.about-story {
    padding: var(--spacing-4xl) 0;
}

.about-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.story-content h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.story-content p {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

/* ===== Team Section ===== */
.team {
    padding: var(--spacing-4xl) 0;
    background-color: var(--color-bg-alt);
}

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

.section-title {
    font-size: var(--font-size-3xl);
    text-align: center;
    margin-bottom: var(--spacing-md);
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-3xl);
    font-size: var(--font-size-lg);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
}

.team-member {
    background-color: var(--color-bg);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-2xl);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.member-avatar {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.member-name {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.member-role {
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.member-bio {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.member-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
}

.skill-tag {
    background-color: var(--color-bg-alt);
    color: var(--color-text-light);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--border-radius);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* ===== Values Section ===== */
.values {
    padding: var(--spacing-4xl) 0;
}

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

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
}

.value-item {
    text-align: center;
    padding: var(--spacing-xl);
}

.value-icon {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.value-item h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.value-item p {
    color: var(--color-text-light);
}

/* ===== Contact Section ===== */
.contact {
    padding: var(--spacing-4xl) 0;
}

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

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-4xl);
    align-items: start;
}

.contact-info h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
}

.contact-info p {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-2xl);
}

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

.contact-method {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.method-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.method-info h3 {
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.method-info p {
    color: var(--color-text-light);
    margin: 0;
}

/* ===== Form Styles ===== */
.contact-form-wrapper {
    background-color: var(--color-bg-alt);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-2xl);
}

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

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

.form-group label {
    font-weight: 500;
    color: var(--color-text);
}

.optional {
    font-weight: 400;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ===== Thank You Page Styles ===== */
.thank-you-hero {
    padding: var(--spacing-4xl) 0;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-alt) 100%);
    min-height: 70vh;
    display: flex;
    align-items: center;
    text-align: center;
}

.thank-you-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.success-icon {
    color: var(--color-success);
    margin-bottom: var(--spacing-xl);
    display: flex;
    justify-content: center;
}

.thank-you-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.thank-you-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.thank-you-actions {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    flex-wrap: wrap;
}

.next-steps {
    padding: var(--spacing-4xl) 0;
}

.next-steps-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

.next-steps h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-3xl);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
}

.step {
    text-align: center;
    padding: var(--spacing-xl);
}

.step-number {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0 auto var(--spacing-lg);
}

.step h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-md);
}

.step p {
    color: var(--color-text-light);
}

.form-help {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-xs);
    display: block;
}

.form-group textarea[readonly] {
    background-color: var(--color-bg-alt);
    color: var(--color-text-light);
    cursor: default;
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: var(--font-size-base);
    transition: var(--transition-fast);
    background-color: var(--color-bg);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

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

.checkbox-group {
    flex-direction: row;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.checkbox-label input[type="checkbox"] {
    margin: 0;
    width: auto;
}

.form-success {
    text-align: center;
    padding: var(--spacing-2xl);
}

.success-icon {
    color: var(--color-success);
    margin-bottom: var(--spacing-lg);
    display: flex;
    justify-content: center;
}

.form-success h3 {
    color: var(--color-success);
    margin-bottom: var(--spacing-md);
}

.form-success p {
    color: var(--color-text-light);
}

/* ===== Footer ===== */
.footer {
    background-color: var(--color-bg-alt);
    border-top: 1px solid var(--color-border-light);
    padding: var(--spacing-xl) 0;
    margin-top: var(--spacing-4xl);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
}

.footer p {
    color: var(--color-text-muted);
    margin: 0;
    font-size: var(--font-size-sm);
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-5xl: 2.5rem;
        --spacing-4xl: 3rem;
    }
    
    .nav-menu {
        position: fixed;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-bg);
        border-top: 1px solid var(--color-border-light);
        flex-direction: column;
        gap: 0;
        padding: var(--spacing-lg);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: var(--transition);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-menu .nav-link {
        padding: var(--spacing-md) 0;
        border-bottom: 1px solid var(--color-border-light);
        width: 100%;
        text-align: center;
    }
    
    .nav-menu .nav-link:last-child {
        border-bottom: none;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .nav-toggle.active .bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }
    
    .nav-toggle.active .bar:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-actions .btn {
        width: 100%;
        max-width: 280px;
    }
    
    .features-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .project-actions {
        flex-direction: column;
    }
    
    .project-actions .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .container,
    .nav-container,
    .hero-container,
    .page-hero-container,
    .features-container,
    .projects-container,
    .about-container,
    .team-container,
    .values-container,
    .contact-container,
    .footer-container {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    .hero {
        min-height: 60vh;
    }
    
    .project-card {
        padding: var(--spacing-lg);
    }
    
    .contact-form-wrapper {
        padding: var(--spacing-lg);
    }
}

/* ===== Accessibility ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ===== Focus Styles ===== */
:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===== Print Styles ===== */
@media print {
    .header,
    .footer,
    .nav-toggle,
    .btn {
        display: none !important;
    }
    
    .main {
        margin: 0 !important;
        padding: 0 !important;
    }
    
    * {
        background: white !important;
        color: black !important;
        box-shadow: none !important;
    }
}