/* ========================================
   CSS Variables
   ======================================== */
:root {
    --color-bg: #ffffff;
    --color-text: #0a0a0a;
    --color-text-muted: #666666;
    --color-accent: #2aa9e1;
    --color-accent-hover: #1e8ec4;
    --color-border: #e5e5e5;

    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-2xl: 8rem;

    --transition-smooth: all 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: all 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ========================================
   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(--color-text);
    background-color: var(--color-bg);
    line-height: 1.1em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* ========================================
   Typography
   ======================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

h1 {
    font-size: clamp(2.5rem, 8vw, 6rem);
    font-weight: 700;
    letter-spacing: -0.04em;
}

h2 {
    font-size: clamp(2rem, 5vw, 4rem);
    letter-spacing: -0.03em;
}

h3 {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    letter-spacing: -0.02em;
}

p {
    font-size: 1.125rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    letter-spacing: -0.01em;
}

/* ========================================
   Layout
   ======================================== */
.section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    position: relative;
}

.container {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

/* ========================================
   Hero Section
   ======================================== */
.hero-section {
    text-align: center;
    position: relative;
    background: var(--color-bg);
}

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

.logo {
    max-width: 500px;
    width: 100%;
    height: auto;
}

.hero-tagline {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 300;
    color: var(--color-text-muted);
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-xl);
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.3s forwards;
}

.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    color: var(--color-text-muted);
    cursor: pointer;
    transition: var(--transition-smooth);
    animation: bounce 2s infinite;
    opacity: 0.6;
}

.scroll-indicator:hover {
    color: var(--color-accent);
    opacity: 1;
}

/* ========================================
   About/Services Section
   ======================================== */
.about-section {
    background-color: var(--color-bg);
    padding: var(--spacing-2xl) var(--spacing-md);
}

.section-title {
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 300;
    color: var(--color-text);
    line-height: 1;
    letter-spacing: -0.05em;
    margin: 0 0 var(--spacing-2xl) 0;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    border-top: 1px solid var(--color-border);
}

.service-item {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: transparent;
    border-right: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    transition: all 0.3s ease;
    position: relative;
}

.service-item:nth-child(2n) {
    border-right: none;
}

.service-item h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 400;
    letter-spacing: -0.02em;
}

.service-item p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-text-muted);
    max-width: 400px;
}

.service-item:hover {
    background-color: #fafafa;
    padding-left: calc(var(--spacing-lg) + 1rem);
}

/* ========================================
   Contact Section
   ======================================== */
.contact-section {
    text-align: left;
    background: var(--color-bg);
    padding: var(--spacing-2xl) var(--spacing-md);
}

.contact-form {
    max-width: 800px;
    margin: 0;
    text-align: left;
}

.form-group {
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 400;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 0;
    border: none;
    border-bottom: 1px solid var(--color-border);
    border-radius: 0;
    font-family: var(--font-primary);
    font-size: 1.25rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    transition: border-color 0.4s ease;
    background-color: transparent;
    color: var(--color-text);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: transparent;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-bottom-color: var(--color-text);
    background-color: transparent;
}

.form-group textarea {
    resize: none;
    min-height: 120px;
    line-height: 1.6;
}

.submit-button {
    display: inline-block;
    width: auto;
    padding: 0.875rem 3rem;
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-text);
    border-radius: 0;
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.4s ease;
    margin-top: var(--spacing-lg);
    float: right;
}

.submit-button:hover {
    background: var(--color-text);
    color: var(--color-bg);
    transform: translateX(-4px);
}

.submit-button:active {
    transform: translateX(-4px) scale(0.98);
}

.form-status {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    text-align: right;
    font-size: 0.875rem;
    letter-spacing: 0.05em;
    display: none;
    clear: both;
}

.form-status.success {
    display: block;
    color: var(--color-text);
}

.form-status.error {
    display: block;
    color: #ef4444;
}

/* ========================================
   Footer
   ======================================== */
.footer {
    padding: var(--spacing-lg) var(--spacing-md);
    text-align: center;
    border-top: 1px solid var(--color-border);
    background-color: var(--color-bg);
}

.footer p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0.25rem 0;
    letter-spacing: -0.01em;
}

.footer p:first-child {
    font-weight: 500;
    color: var(--color-text);
}

/* ========================================
   Animations
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-12px);
    }
    60% {
        transform: translateX(-50%) translateY(-6px);
    }
}

.fade-in {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

/* Stagger animations */
.fade-in:nth-child(1) { animation-delay: 0.1s; }
.fade-in:nth-child(2) { animation-delay: 0.2s; }
.fade-in:nth-child(3) { animation-delay: 0.3s; }
.fade-in:nth-child(4) { animation-delay: 0.4s; }

/* ========================================
   Scroll Reveal Animation
   ======================================== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

    .service-item {
        border-right: none;
    }
}

@media (max-width: 768px) {
    .section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

    .about-section,
    .contact-section {
        padding: var(--spacing-lg) var(--spacing-sm);
    }

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

    .logo {
        max-width: 320px;
    }

    .section-title {
        font-size: 3rem;
        margin-bottom: var(--spacing-lg);
    }

    .form-group {
        margin-bottom: var(--spacing-lg);
    }

    .form-group input,
    .form-group textarea {
        font-size: 1.125rem;
    }

    .submit-button {
        float: none;
        width: 100%;
        margin-top: var(--spacing-md);
    }

    p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    html {
        font-size: 14px;
    }

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

    .logo {
        max-width: 260px;
    }

    .hero-tagline {
        font-size: 1.125rem;
    }

    .service-item {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}

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

/* Focus styles for keyboard navigation */
a:focus,
button:focus,
input:focus,
textarea:focus {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* ========================================
   Custom Scrollbar
   ======================================== */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #fafafa;
}

::-webkit-scrollbar-thumb {
    background: #d1d1d1;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-accent);
}