/* ==========================================================================
   Partnerships.Engineer - Clean Modern Design
   Inspired by: Happy Robot, Throxy, Quinn, Vogel
   ========================================================================== */

:root {
    --color-bg: #faf9f7;
    --color-surface: #ffffff;
    --color-text: #1a1a1a;
    --color-text-muted: #666666;
    --color-border: #e5e5e5;
    --color-accent: #1a1a1a;
    --color-accent-light: #f0f0f0;
    --color-highlight: #6366f1;

    --font-serif: 'Instrument Serif', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-logo: 'Space Grotesk', -apple-system, sans-serif;

    --grid-size: 32px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);

    /* Subtle graph paper */
    background-image:
        linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,0,0,0.03) 1px, transparent 1px);
    background-size: var(--grid-size) var(--grid-size);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ==========================================================================
   Header
   ========================================================================== */

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(250, 249, 247, 0.9);
    backdrop-filter: blur(10px);
    max-width: 100vw;
    overflow: hidden;
}

.logo {
    font-family: var(--font-sans);
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
}

.logo-mark {
    height: 50px;
    width: 50px;
    color: var(--color-text);
    margin-right: 0.25rem;
}

.logo-text {
    font-family: var(--font-sans);
    font-size: 1.35rem;
    font-weight: 500;
    letter-spacing: -0.01em;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    white-space: nowrap;
}

.nav a {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.nav a:hover {
    color: var(--color-text);
}

.btn-nav {
    background: var(--color-accent);
    color: #fff !important;
    padding: 0.65rem 1.25rem;
    border-radius: 6px;
    font-weight: 500;
}

.btn-nav:hover {
    background: #333;
}

/* ==========================================================================
   Hero
   ========================================================================== */

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 4rem;
}

.hero-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1.5rem;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 400;
    line-height: 1.15;
    color: var(--color-text);
    margin-bottom: 3rem;
}

.hero-title .italic {
    font-style: italic;
    color: var(--color-text-muted);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto;
}

/* Hero Visual - Video Container */
.hero-visual {
    width: 100%;
    max-width: 900px;
    margin-top: 3rem;
}

.video-frame {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    overflow: hidden;
    box-shadow:
        0 4px 6px rgba(0,0,0,0.02),
        0 12px 40px rgba(0,0,0,0.06);
}

.video-container {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 aspect ratio */
    background: #1a1a1a;
}

.video-container video,
.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-video {
    display: block;
}

/* ==========================================================================
   Services
   ========================================================================== */

.services {
    padding: 8rem 0;
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4rem;
}

.service {
    padding: 0 1rem;
}

.service-number {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    font-style: italic;
    color: var(--color-text-muted);
    display: block;
    margin-bottom: 1rem;
}

.service h2 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 1rem;
}

.service-description {
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.service-list {
    list-style: none;
}

.service-list li {
    padding: 0.5rem 0;
    border-top: 1px solid var(--color-border);
    font-size: 0.95rem;
    color: var(--color-text);
}

.service-list li:last-child {
    border-bottom: 1px solid var(--color-border);
}

/* ==========================================================================
   About
   ========================================================================== */

.about {
    padding: 8rem 0;
}

.about-content {
    max-width: 800px;
}

.about h2 {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.about .italic {
    font-style: italic;
    color: var(--color-text-muted);
}

.about p {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    line-height: 1.8;
    max-width: 600px;
}

/* ==========================================================================
   Contact
   ========================================================================== */

.contact {
    padding: 8rem 0;
    background: var(--color-accent);
}

.contact-content {
    text-align: center;
}

.contact-label {
    font-size: 0.85rem;
    font-weight: 500;
    color: rgba(255,255,255,0.6);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.contact h2 {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 400;
    font-style: italic;
    color: #fff;
    margin-bottom: 2rem;
}

.btn-primary {
    display: inline-block;
    background: #fff;
    color: var(--color-accent);
    padding: 1rem 2rem;
    border-radius: 6px;
    font-weight: 500;
    text-decoration: none;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.2);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.footer {
    padding: 2rem 0;
    border-top: 1px solid var(--color-border);
}

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

.footer-logo {
    font-family: var(--font-sans);
    font-weight: 500;
    letter-spacing: -0.01em;
    color: var(--color-text);
}

.footer-copy {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* ==========================================================================
   Contact Page
   ========================================================================== */

.contact-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 2rem 4rem;
}

.contact-page-content {
    max-width: 500px;
    margin: 0 auto;
    text-align: center;
}

.contact-page-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    font-weight: 400;
    font-style: italic;
    margin-bottom: 1rem;
}

.contact-page-subtitle {
    color: var(--color-text-muted);
    margin-bottom: 2.5rem;
}

.contact-form {
    text-align: left;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color 0.2s;
}

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

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

.btn-submit {
    width: 100%;
    padding: 1rem;
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 500;
    color: #fff;
    background: var(--color-accent);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-submit:hover {
    background: #333;
}

.form-message {
    padding: 1rem 1.25rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    text-align: center;
}

.form-message.success {
    background: #ecfdf5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.form-message.error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* ==========================================================================
   404 Page
   ========================================================================== */

.error-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
}

.error-content {
    text-align: center;
}

.error-code {
    font-family: var(--font-serif);
    font-size: 6rem;
    font-style: italic;
    color: var(--color-border);
    display: block;
    line-height: 1;
    margin-bottom: 1rem;
}

.error-content h1 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 400;
    margin-bottom: 0.75rem;
}

.error-content p {
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

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

@media (max-width: 900px) {
    .services-grid {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 640px) {
    .header {
        padding: 1rem;
    }

    .nav a:not(.btn-nav) {
        display: none;
    }

    .hero {
        padding: 7rem 1.5rem 3rem;
    }

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

    .footer .container {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}