/* ============================================
   SLATE Industries — Styles
   ============================================ */

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

:root {
    --bg-primary: #0A0E1A;
    --bg-secondary: #0F1729;
    --accent: #0066FF;
    --accent-deep: #0044CC;
    --text-primary: #FFFFFF;
    --text-secondary: #A0AEC0;
    --border: #1E2D4A;
    --nav-height: 72px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

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

/* --- Utility --- */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: all 0.25s ease;
    border: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent);
    color: #fff;
}

.btn-primary:hover {
    background: var(--accent-deep);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 102, 255, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
}

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

.btn-full {
    width: 100%;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.3s ease, background 0.3s ease;
}

.nav.scrolled {
    border-bottom-color: var(--border);
    background: rgba(10, 14, 26, 0.95);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 1.35rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.nav-logo-accent {
    color: var(--text-secondary);
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: color 0.2s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.25s ease;
}

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

.nav-link.active::after {
    width: 100%;
}

.nav-cta {
    padding: 10px 22px;
    font-size: 0.85rem;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* --- Hero --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    padding: var(--nav-height) 24px 60px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 102, 255, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 102, 255, 0.06) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 50%, black 20%, transparent 100%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 40%, rgba(0, 102, 255, 0.08) 0%, transparent 60%);
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
}

.hero-headline {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.hero-sub {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 16px;
    line-height: 1.7;
}

.hero-tagline {
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 40px;
}

.hero-ctas {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.hero-scroll-arrow {
    width: 24px;
    height: 24px;
    border-right: 2px solid var(--text-secondary);
    border-bottom: 2px solid var(--text-secondary);
    transform: rotate(45deg);
    animation: scrollBounce 2s ease infinite;
    opacity: 0.5;
}

@keyframes scrollBounce {
    0%, 100% { transform: rotate(45deg) translateY(0); opacity: 0.5; }
    50% { transform: rotate(45deg) translateY(8px); opacity: 1; }
}

/* --- Fade-in Animations --- */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease forwards;
}

.fade-delay-1 { animation-delay: 0.15s; }
.fade-delay-2 { animation-delay: 0.3s; }
.fade-delay-3 { animation-delay: 0.45s; }

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- Scroll Reveal --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

/* --- Sections --- */
.section {
    padding: 120px 0;
}

.section-alt {
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
}

.section-divider {
    width: 60px;
    height: 3px;
    background: var(--accent);
    margin: 0 auto 20px;
    border-radius: 2px;
}

.section-subtitle {
    color: var(--text-secondary);
    max-width: 560px;
    margin: 0 auto;
    font-size: 1.05rem;
    line-height: 1.7;
}

/* --- About --- */
.about-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 48px;
}

.about-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.sdvosb-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    background: rgba(0, 102, 255, 0.08);
    border: 1px solid rgba(0, 102, 255, 0.2);
    border-radius: 12px;
    padding: 20px 32px;
    max-width: 520px;
    margin: 0 auto 64px;
}

.sdvosb-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sdvosb-text strong {
    font-size: 0.95rem;
    color: var(--text-primary);
}

.sdvosb-text span {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.value-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.value-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px 28px;
    text-align: center;
    transition: border-color 0.3s ease, transform 0.3s ease;
}

.value-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.value-card-icon {
    margin-bottom: 20px;
    display: flex;
    justify-content: center;
}

.value-card-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.value-card-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* --- Capabilities --- */
.capability-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-bottom: 56px;
}

.capability-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px 32px;
    transition: border-color 0.3s ease, transform 0.3s ease;
}

.capability-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.capability-card-number {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.capability-card-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.capability-card-text {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}

.capabilities-download {
    text-align: center;
}

.download-banner {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 32px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    position: relative;
    cursor: not-allowed;
    opacity: 0.6;
}

.download-banner svg {
    flex-shrink: 0;
}

.download-tooltip {
    display: none;
    position: absolute;
    bottom: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 400;
    white-space: nowrap;
    color: var(--text-secondary);
}

.download-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--border);
}

.download-banner:hover .download-tooltip {
    display: block;
}

.capabilities-note {
    margin-top: 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* --- Contact --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.03em;
}

.form-input {
    padding: 14px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
    outline: none;
}

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

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%23A0AEC0' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
    cursor: pointer;
}

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

.contact-info-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 40px 32px;
}

.contact-info-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 28px;
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px 0;
    border-bottom: 1px solid var(--border);
}

.contact-detail:last-child {
    border-bottom: none;
}

.contact-detail svg {
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-detail-label {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 2px;
}

.contact-detail-value {
    font-size: 0.95rem;
    font-weight: 500;
    display: block;
}

a.contact-detail-value:hover {
    color: var(--accent);
}

/* --- Footer --- */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 40px;
}

.footer-grid {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 40px;
    gap: 24px;
    flex-wrap: wrap;
}

.footer-logo {
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.footer-tagline {
    margin-top: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: 28px;
}

.footer-link {
    font-size: 0.9rem;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer-note {
    margin-top: 8px;
    font-size: 0.8rem;
    opacity: 0.7;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .value-cards {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .capability-cards {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 64px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--bg-primary);
        flex-direction: column;
        justify-content: center;
        gap: 24px;
        padding: 40px;
        transform: translateX(100%);
        transition: transform 0.35s ease;
    }

    .nav-menu.open {
        transform: translateX(0);
    }

    .nav-link {
        font-size: 1.2rem;
    }

    .nav-link::after {
        display: none;
    }

    .nav-toggle.active .nav-toggle-bar:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active .nav-toggle-bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .nav-toggle-bar:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .section {
        padding: 80px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .sdvosb-badge {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }

    .hero-ctas {
        flex-direction: column;
        align-items: center;
    }

    .hero-ctas .btn {
        width: 100%;
        max-width: 280px;
    }

    .footer-grid {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .download-banner {
        font-size: 0.85rem;
        padding: 14px 20px;
    }
}