/* ==========================================================================
   Eagle Flight — Computer Systems Design
   Design System & Global Styles
   ========================================================================== */

/* --- Custom Properties ------------------------------------------------ */
:root {
    /* Palette */
    --color-bg:           #0A0F16;
    --color-bg-raised:    #111923;
    --color-bg-elevated:  #182232;
    --color-border:       #1E2D40;
    --color-border-light: #263750;
    --color-accent:       #D4A843;
    --color-accent-dim:   #A8852E;
    --color-accent-glow:  #F0D078;
    --color-text-primary: #EAEDF0;
    --color-text-secondary: #94A3B8;
    --color-text-muted:   #5C6F87;
    --color-surface-card: #111D2C;

    /* Typography */
    --font-sans:  'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    --font-mono:  'JetBrains Mono', 'SF Mono', 'Consolas', monospace;
    --font-size-root:   16px;
    --line-height-body: 1.7;

    /* Spacing */
    --space-unit: 0.25rem;
    --space-xs:   calc(var(--space-unit) * 1);   /* 4px */
    --space-sm:   calc(var(--space-unit) * 2);   /* 8px */
    --space-md:   calc(var(--space-unit) * 4);   /* 16px */
    --space-lg:   calc(var(--space-unit) * 6);   /* 24px */
    --space-xl:   calc(var(--space-unit) * 10);  /* 40px */
    --space-2xl:  calc(var(--space-unit) * 16);  /* 64px */
    --space-3xl:  calc(var(--space-unit) * 24);  /* 96px */
    --space-4xl:  calc(var(--space-unit) * 36);  /* 144px */

    /* Layout */
    --max-width:       1200px;
    --content-narrow:  780px;
    --header-height:   72px;

    /* Borders & Radii */
    --radius-sm:  4px;
    --radius-md:  8px;
    --radius-lg:  14px;
    --radius-full: 9999px;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 150ms;
    --duration-base: 250ms;
    --duration-slow: 400ms;
}

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

html {
    font-size: var(--font-size-root);
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    font-weight: 400;
    line-height: var(--line-height-body);
    color: var(--color-text-primary);
    background-color: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

img, svg {
    display: block;
    max-width: 100%;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--duration-fast) var(--ease-out);
}

a:hover {
    color: var(--color-accent-glow);
}

ul, ol {
    list-style: none;
}

::selection {
    background: #D4A843;
    color: #0A0F16;
}

/* --- Typography --------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text-primary);
}

.section-title {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-md);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 520px;
}

/* --- Header ------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: #0A0F16;
    border-bottom: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
}

.site-header.scrolled {
    background: #0A0F16;
}

.header-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-xl);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-primary);
    text-decoration: none;
}

.logo:hover {
    color: var(--color-text-primary);
}

.logo-mark {
    flex-shrink: 0;
}

.logo-text {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.main-nav ul {
    display: flex;
    gap: var(--space-xl);
}

.main-nav a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--duration-fast) var(--ease-out);
    position: relative;
}

.main-nav a:hover {
    color: var(--color-accent-glow);
}

.main-nav a.nav-current {
    color: var(--color-accent);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: transform var(--duration-base) var(--ease-out), opacity var(--duration-base) var(--ease-out);
}

/* --- Buttons ------------------------------------------------------------ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border: 1.5px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-base) var(--ease-out);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-accent);
    color: #0A0F16;
    border-color: var(--color-accent);
}

.btn-primary:hover {
    background: var(--color-accent-glow);
    border-color: var(--color-accent-glow);
    color: #0A0F16;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px #D4A84330;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: var(--color-border-light);
}

.btn-ghost:hover {
    color: var(--color-accent-glow);
    border-color: var(--color-accent);
}

/* --- Hero ---------------------------------------------------------------- */
.hero {
    padding: calc(var(--header-height) + var(--space-4xl)) var(--space-xl) var(--space-3xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
    align-items: center;
}

.hero-eyebrow {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-lg);
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    line-height: 1.08;
    letter-spacing: -0.025em;
    margin-bottom: var(--space-lg);
}

.text-accent {
    color: var(--color-accent);
}

.hero-lead {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
    margin-bottom: var(--space-xl);
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.hero-visual {
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-emblem {
    width: 100%;
    max-width: 380px;
}

.hero-emblem svg {
    width: 100%;
    height: auto;
}

/* --- Services ----------------------------------------------------------- */
.services {
    padding: var(--space-3xl) var(--space-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-header .section-subtitle {
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.service-card {
    background: var(--color-surface-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    transition: border-color var(--duration-base) var(--ease-out),
                transform var(--duration-base) var(--ease-out);
}

.service-card:hover {
    border-color: var(--color-accent-dim);
    transform: translateY(-2px);
}

.service-icon {
    margin-bottom: var(--space-md);
}

.service-name {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.service-desc {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* --- About -------------------------------------------------------------- */
.about {
    padding: var(--space-3xl) var(--space-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--space-2xl);
    align-items: start;
}

.about-lead {
    font-size: 1.15rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.about-content p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: #111923;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.stat-number {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-accent);
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* --- Contact ------------------------------------------------------------ */
.contact {
    padding: var(--space-3xl) var(--space-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.contact-lead {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
}

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

.contact-item dt {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-xs);
}

.contact-item dd {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.contact-item a {
    color: var(--color-text-secondary);
}

.contact-item a:hover {
    color: var(--color-accent-glow);
}

.contact-form-wrapper {
    background: #111923;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
}

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

.form-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.form-field label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-field input,
.form-field textarea {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    color: var(--color-text-primary);
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.85rem;
    outline: none;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.form-field input:focus,
.form-field textarea:focus {
    border-color: var(--color-accent);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
    color: var(--color-text-muted);
}

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

/* --- Legal Pages -------------------------------------------------------- */
.legal-hero {
    padding: calc(var(--header-height) + var(--space-2xl)) var(--space-xl) var(--space-xl);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}

.legal-hero-inner {
    max-width: var(--content-narrow);
    margin: 0 auto;
}

.legal-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
}

.legal-date {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-family: var(--font-mono);
}

.legal-content {
    padding: var(--space-2xl) var(--space-xl) var(--space-3xl);
}

.legal-inner {
    max-width: var(--content-narrow);
    margin: 0 auto;
}

.legal-inner h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
}

.legal-inner h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
}

.legal-inner p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.75;
}

.legal-inner ul {
    list-style: disc;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-md);
    color: var(--color-text-secondary);
}

.legal-inner ul li {
    margin-bottom: var(--space-sm);
    line-height: 1.65;
}

.legal-inner strong {
    color: var(--color-text-primary);
}

.legal-address {
    font-style: normal;
    color: var(--color-text-secondary);
    line-height: 1.7;
    padding: var(--space-md) 0;
}

.legal-address strong {
    color: var(--color-text-primary);
}

/* --- Footer ------------------------------------------------------------- */
.site-footer {
    background: #080C12;
    border-top: 1px solid var(--color-border);
    padding: var(--space-2xl) var(--space-xl) var(--space-lg);
    margin-top: auto;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
}

.footer-brand {
    max-width: 240px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-primary);
    font-weight: 700;
    margin-bottom: var(--space-sm);
}

.footer-logo:hover {
    color: var(--color-text-primary);
}

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

.footer-links {
    display: flex;
    gap: var(--space-2xl);
}

.footer-col h4 {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-sm);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.footer-col a {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.footer-col a:hover {
    color: var(--color-accent-glow);
}

.footer-bottom {
    max-width: var(--max-width);
    margin: 0 auto;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* --- Mobile Nav Overlay ------------------------------------------------- */
@media (max-width: 768px) {
    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--color-bg);
        display: flex;
        align-items: center;
        justify-content: center;
        opacity: 0;
        pointer-events: none;
        transition: opacity var(--duration-base) var(--ease-out);
    }

    .main-nav.open {
        opacity: 1;
        pointer-events: auto;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: var(--space-xl);
    }

    .main-nav a {
        font-size: 1.2rem;
    }

    .mobile-toggle {
        display: flex;
    }

    .mobile-toggle.open span:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

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

    .mobile-toggle.open span:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

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

    .hero-lead {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-visual {
        order: -1;
    }

    .hero-emblem {
        max-width: 220px;
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

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

    .footer-inner {
        flex-direction: column;
        gap: var(--space-xl);
    }

    .footer-links {
        gap: var(--space-xl);
    }
}

@media (max-width: 480px) {
    .hero {
        padding: calc(var(--header-height) + var(--space-2xl)) var(--space-md) var(--space-xl);
    }

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

    .services,
    .about,
    .contact {
        padding: var(--space-xl) var(--space-md);
    }

    .legal-hero {
        padding: calc(var(--header-height) + var(--space-xl)) var(--space-md) var(--space-lg);
    }

    .legal-content {
        padding: var(--space-xl) var(--space-md);
    }

    .site-footer {
        padding: var(--space-xl) var(--space-md) var(--space-lg);
    }
}

/* --- Animations --------------------------------------------------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp var(--duration-slow) var(--ease-out) forwards;
}