/* ========================================
   Pivotal Technology Inc — Site Styles
   Dark modern theme
   ======================================== */

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

:root {
    --bg-primary: #0D1117;
    --bg-secondary: #161B22;
    --bg-tertiary: #1C2333;
    --bg-card: #1A2030;
    --accent-blue: #1A6FA0;
    --accent-blue-light: #2B8FCC;
    --accent-gold: #D4A843;
    --accent-gold-light: #E8C36A;
    --text-primary: #F0F0F0;
    --text-secondary: #8B949E;
    --text-muted: #6B7685;
    --border-color: #2A3140;
    --gradient-blue: linear-gradient(135deg, #0D1117 0%, #132238 100%);
    --gradient-accent: linear-gradient(135deg, #1A6FA0 0%, #0D4A73 100%);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(26, 111, 160, 0.15);
    --transition: 0.3s ease;
    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --max-width: 1140px;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 72px;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--accent-blue-light);
    text-decoration: none;
    transition: color var(--transition);
}

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

img {
    max-width: 100%;
    height: auto;
}

/* --- Utilities --- */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
}

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

.section--accent {
    background: var(--gradient-accent);
    position: relative;
    overflow: hidden;
}

.section--accent::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at 30% 50%, rgba(212, 168, 67, 0.08) 0%, transparent 60%);
    pointer-events: none;
}

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

.section__label {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--accent-gold);
    margin-bottom: 16px;
}

.section__title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 16px;
}

.section__subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
}

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: background-color var(--transition), border-color var(--transition);
}

.nav--scrolled {
    background-color: rgba(13, 17, 23, 0.95);
    border-bottom-color: var(--border-color);
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.nav__brand {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.nav__brand:hover {
    color: var(--accent-gold);
}

.nav__links {
    display: flex;
    list-style: none;
    gap: 8px;
}

.nav__link {
    display: block;
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 6px;
    transition: color var(--transition), background-color var(--transition);
}

.nav__link:hover,
.nav__link--active {
    color: var(--text-primary);
    background-color: rgba(255, 255, 255, 0.05);
}

.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--text-primary);
}

.nav__toggle-icon {
    display: block;
    width: 24px;
    height: 2px;
    background-color: currentColor;
    position: relative;
    transition: background-color var(--transition);
}

.nav__toggle-icon::before,
.nav__toggle-icon::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: currentColor;
    transition: transform var(--transition);
}

.nav__toggle-icon::before {
    top: -7px;
}

.nav__toggle-icon::after {
    top: 7px;
}

.nav__toggle.active .nav__toggle-icon {
    background-color: transparent;
}

.nav__toggle.active .nav__toggle-icon::before {
    transform: translateY(7px) rotate(45deg);
}

.nav__toggle.active .nav__toggle-icon::after {
    transform: translateY(-7px) rotate(-45deg);
}

/* --- Hero --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--gradient-blue);
}

.hero__bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.hero__bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(26, 111, 160, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(26, 111, 160, 0.05) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero__bg-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(26, 111, 160, 0.15), transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation: pulse 8s ease-in-out infinite alternate;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.6; }
    100% { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
}

.hero__content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 0 24px;
    max-width: 800px;
}

.hero__logo {
    max-height: 160px;
    margin-bottom: 40px;
    opacity: 0.95;
}

.hero__title {
    font-family: var(--font-heading);
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-blue-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
}

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

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn--primary {
    background: var(--accent-gold);
    color: #1a1a1a;
}

.btn--primary:hover {
    background: var(--accent-gold-light);
    color: #1a1a1a;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(212, 168, 67, 0.25);
}

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

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

/* --- Cards Grid --- */
.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 36px 28px;
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow);
}

.card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(26, 111, 160, 0.12);
    color: var(--accent-blue-light);
    margin-bottom: 20px;
    font-size: 1.4rem;
}

.card__title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

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

/* --- AI Section --- */
.ai-section {
    position: relative;
}

.ai-section .section__title {
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-gold) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.ai-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
}

.ai-grid__content {
    order: 1;
}

.ai-grid__text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.ai-features {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.ai-feature {
    display: flex;
    gap: 16px;
    align-items: flex-start;
}

.ai-feature__icon {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(212, 168, 67, 0.1);
    color: var(--accent-gold);
    font-size: 1.1rem;
}

.ai-feature__content h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.ai-feature__content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.ai-grid__visual {
    order: 2;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ai-visual {
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
    position: relative;
}

.ai-visual__ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid;
    animation: spin 20s linear infinite;
}

.ai-visual__ring--outer {
    inset: 0;
    border-color: rgba(26, 111, 160, 0.2);
}

.ai-visual__ring--mid {
    inset: 15%;
    border-color: rgba(212, 168, 67, 0.2);
    animation-direction: reverse;
    animation-duration: 15s;
}

.ai-visual__ring--inner {
    inset: 30%;
    border-color: rgba(26, 111, 160, 0.3);
    animation-duration: 10s;
}

.ai-visual__center {
    position: absolute;
    inset: 40%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    color: var(--accent-gold);
    background: radial-gradient(circle, rgba(212, 168, 67, 0.1), transparent);
    border-radius: 50%;
}

.ai-visual__dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-blue-light);
    border-radius: 50%;
    box-shadow: 0 0 12px var(--accent-blue-light);
}

.ai-visual__dot:nth-child(5) { top: 0; left: 50%; transform: translate(-50%, -50%); }
.ai-visual__dot:nth-child(6) { top: 50%; right: 0; transform: translate(50%, -50%); }
.ai-visual__dot:nth-child(7) { bottom: 0; left: 50%; transform: translate(-50%, 50%); }
.ai-visual__dot:nth-child(8) { top: 50%; left: 0; transform: translate(-50%, -50%); }

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

/* --- Stats / Why Us --- */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 32px;
}

.stat {
    text-align: center;
    padding: 32px 20px;
}

.stat__icon {
    font-size: 1.5rem;
    color: var(--accent-gold);
    margin-bottom: 16px;
}

.stat__value {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.stat__label {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

/* --- Process / How We Work --- */
.process {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
}

.process::before {
    content: '';
    position: absolute;
    top: 40px;
    left: 12.5%;
    right: 12.5%;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-gold), var(--accent-blue));
    opacity: 0.3;
}

.process__step {
    text-align: center;
    position: relative;
    z-index: 1;
}

.process__number {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--bg-card);
    border: 2px solid var(--accent-blue);
    color: var(--accent-blue-light);
    transition: all var(--transition);
}

.process__step:hover .process__number {
    background: var(--accent-blue);
    color: var(--text-primary);
    box-shadow: 0 0 30px rgba(26, 111, 160, 0.3);
}

.process__title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

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

/* --- Contact --- */
.contact {
    text-align: center;
}

.contact__methods {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.contact__method {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.contact__method-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(26, 111, 160, 0.12);
    color: var(--accent-blue-light);
    font-size: 1.3rem;
    transition: all var(--transition);
}

.contact__method:hover .contact__method-icon {
    background: var(--accent-blue);
    color: var(--text-primary);
}

.contact__method-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact__method-value {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
}

.contact__method-value a {
    color: var(--text-primary);
}

.contact__method-value a:hover {
    color: var(--accent-gold);
}

/* --- Social Links --- */
.social {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.social__link {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all var(--transition);
}

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

/* --- Footer --- */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 32px 0;
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}

.footer__brand {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

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

.footer__social {
    display: flex;
    gap: 12px;
}

.footer__social-link {
    color: var(--text-muted);
    font-size: 1rem;
    transition: color var(--transition);
}

.footer__social-link:hover {
    color: var(--accent-gold);
}

/* --- Scroll Animations --- */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Responsive --- */
@media (max-width: 992px) {
    .hero__title {
        font-size: 2.8rem;
    }

    .section {
        padding: 80px 0;
    }

    .section__title {
        font-size: 2rem;
    }

    .ai-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .ai-grid__visual {
        order: -1;
    }

    .ai-visual {
        max-width: 280px;
    }

    .process {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .process::before {
        display: none;
    }
}

@media (max-width: 768px) {
    .nav__links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: rgba(13, 17, 23, 0.98);
        border-bottom: 1px solid var(--border-color);
        padding: 16px 24px;
    }

    .nav__links--open {
        display: flex;
    }

    .nav__toggle {
        display: block;
    }

    .hero {
        min-height: 90vh;
    }

    .hero__title {
        font-size: 2.2rem;
    }

    .hero__subtitle {
        font-size: 1rem;
    }

    .section {
        padding: 64px 0;
    }

    .section__title {
        font-size: 1.75rem;
    }

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

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

    .contact__methods {
        flex-direction: column;
        align-items: center;
        gap: 32px;
    }

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

@media (max-width: 480px) {
    .hero__title {
        font-size: 1.8rem;
    }

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

    .btn {
        width: 100%;
        justify-content: center;
    }

    .stat__value {
        font-size: 2rem;
    }
}