/* ═══════════════════════════════════════════
   PeopleStar Software — Stylesheet
   ═══════════════════════════════════════════ */

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

:root {
    --color-primary: #0B0E14;
    --color-secondary: #1A1F2B;
    --color-accent: #8A9099;
    --color-white: #FFFFFF;
    --color-light: #F7F8F9;
    --color-border: #E2E4E8;
    --color-muted: #6B7280;

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

    --ease-cinematic: cubic-bezier(0.22, 1, 0.36, 1);
    --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);

    --container-max: 1200px;
    --container-narrow: 800px;
    --gutter: clamp(24px, 5vw, 80px);
    --section-pad: clamp(80px, 12vh, 160px);
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-main);
    font-weight: 400;
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-primary);
    background: var(--color-white);
    overflow-x: hidden;
}

::selection {
    background: var(--color-primary);
    color: var(--color-white);
}

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

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

/* ── Grain Overlay ── */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* ── Container ── */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: var(--gutter);
    padding-right: var(--gutter);
}

/* ── Fade-Up Animation ── */
.fade-up {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.8s var(--ease-cinematic), transform 0.8s var(--ease-cinematic);
}

.fade-up.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger children */
.fade-up:nth-child(2) { transition-delay: 0.08s; }
.fade-up:nth-child(3) { transition-delay: 0.16s; }
.fade-up:nth-child(4) { transition-delay: 0.24s; }
.fade-up:nth-child(5) { transition-delay: 0.32s; }
.fade-up:nth-child(6) { transition-delay: 0.40s; }

/* ── Navigation ── */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}

.nav-scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 var(--color-border);
}

.nav-inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 20px var(--gutter);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    transition: opacity 0.2s ease-out;
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-logo-img {
    height: 70px;
    width: auto;
}

.nav-links {
    display: flex;
    gap: 40px;
}

.nav-links a {
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--color-accent);
    transition: color 0.2s ease-out;
}

.nav-scrolled .nav-links a {
    color: var(--color-muted);
}

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

/* Nav toggle (mobile) */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 24px;
    height: 18px;
    position: relative;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 1.5px;
    background: var(--color-primary);
    position: absolute;
    left: 0;
    transition: transform 0.3s var(--ease-cinematic), opacity 0.3s var(--ease-cinematic);
}

.nav-toggle span:first-child { top: 4px; }
.nav-toggle span:last-child { bottom: 4px; }

.nav-toggle.is-active span:first-child {
    top: 50%;
    transform: translateY(-50%) rotate(45deg);
}

.nav-toggle.is-active span:last-child {
    bottom: 50%;
    transform: translateY(50%) rotate(-45deg);
}

.nav-mobile {
    display: none;
    flex-direction: column;
    padding: 0 var(--gutter) 24px;
    gap: 20px;
}

.nav-mobile.is-open {
    display: flex;
}

.nav-mobile a {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-muted);
    transition: color 0.2s ease-out;
}

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

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

.hero-watermark {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 60vw;
    max-width: 700px;
    opacity: 0.03;
    pointer-events: none;
    user-select: none;
}

.hero-watermark img {
    width: 100%;
    height: auto;
    filter: brightness(10);
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding-top: 120px;
    padding-bottom: 120px;
}

.hero-label {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 24px;
}

.hero-headline {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--color-white);
    margin-bottom: 24px;
}

.hero-sub {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.7;
    color: var(--color-accent);
    max-width: 540px;
    margin: 0 auto 48px;
}

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 32px;
}

.hero-note {
    font-size: 0.8125rem;
    color: var(--color-accent);
    opacity: 0.7;
}

/* ── Buttons ── */
.btn {
    display: inline-block;
    font-family: var(--font-main);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    padding: 14px 32px;
    border: none;
    cursor: pointer;
    transition: background 0.2s ease-out, color 0.2s ease-out, border-color 0.2s ease-out, opacity 0.2s ease-out;
}

.btn-primary {
    background: var(--color-white);
    color: var(--color-primary);
}

.btn-primary:hover {
    opacity: 0.85;
}

.btn-ghost {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid rgba(138, 144, 153, 0.3);
}

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

/* ── Sections ── */
.section {
    padding: var(--section-pad) 0;
}

.section-white {
    background: var(--color-white);
}

.section-light {
    background: var(--color-light);
}

.section-dark {
    background: var(--color-primary);
    color: var(--color-white);
}

.section-dark .section-label {
    color: var(--color-accent);
}

.section-label {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 24px;
}

.section-headline {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.2;
    margin-bottom: 32px;
    max-width: var(--container-narrow);
}

/* ── Prose (positioning / general text) ── */
.prose {
    max-width: var(--container-narrow);
}

.prose p {
    font-size: clamp(1rem, 1.2vw, 1.125rem);
    line-height: 1.8;
    color: var(--color-muted);
    margin-bottom: 20px;
}

.prose p:last-child {
    margin-bottom: 0;
}

.prose strong {
    color: var(--color-primary);
    font-weight: 500;
}

/* ── Capabilities (What We Do) ── */
.capabilities {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 48px 64px;
    margin-top: 64px;
}

.capability h3 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
    color: var(--color-primary);
}

.capability p {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-muted);
}

/* ── Philosophy ── */
.philosophy-statements {
    margin-bottom: 40px;
}

.philosophy-line {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 400;
    letter-spacing: -0.01em;
    line-height: 1.5;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.philosophy-anchor {
    font-size: clamp(1.5rem, 3vw, 2.25rem);
    font-weight: 600;
    letter-spacing: -0.025em;
    line-height: 1.3;
    color: var(--color-white);
    margin-bottom: 48px;
    max-width: var(--container-narrow);
}

.philosophy-feel p {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
    line-height: 1.8;
    color: var(--color-accent);
    margin-bottom: 8px;
}

/* ── Phases (How We Work) ── */
.phases {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    margin-top: 56px;
    margin-bottom: 80px;
}

.phase {
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.phase-number {
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    display: block;
    margin-bottom: 16px;
}

.phase h3 {
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 8px;
}

.phase p {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-muted);
}

/* Work statement */
.work-statement {
    max-width: var(--container-narrow);
    margin-bottom: 48px;
    padding-top: 48px;
    border-top: 1px solid var(--color-border);
}

.work-statement h3 {
    font-size: clamp(1.125rem, 2vw, 1.375rem);
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 16px;
}

.work-statement p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-muted);
    margin-bottom: 12px;
}

.work-emphasis {
    font-style: italic;
    color: var(--color-primary) !important;
    margin-top: 20px;
}

/* Trust statement */
.trust-statement {
    max-width: var(--container-narrow);
    padding: 32px;
    background: var(--color-light);
    border-left: 2px solid var(--color-border);
}

.trust-statement p {
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--color-muted);
    margin-bottom: 8px;
}

.trust-statement p:last-child {
    margin-bottom: 0;
}

.trust-statement strong {
    color: var(--color-primary);
    font-weight: 600;
}

/* ── Who We Work With ── */
.who-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    margin-top: 48px;
    margin-bottom: 48px;
}

.who-item {
    padding: 32px;
    border: 1px solid var(--color-border);
    transition: border-color 0.2s ease-out;
}

.who-item:hover {
    border-color: var(--color-accent);
}

.who-item p {
    font-size: 1rem;
    font-weight: 500;
    line-height: 1.6;
    color: var(--color-primary);
}

.who-note {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-muted);
    max-width: var(--container-narrow);
}

.who-note strong {
    color: var(--color-primary);
    font-weight: 500;
}

/* ── Quiet Differentiation ── */
.diff-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    margin-top: 48px;
    margin-bottom: 64px;
}

.diff-item {
    padding-top: 20px;
    border-top: 1px solid rgba(138, 144, 153, 0.2);
}

.diff-label {
    font-size: 0.9375rem;
    font-weight: 500;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.8);
}

.diff-closing p {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    font-weight: 400;
    letter-spacing: -0.01em;
    line-height: 1.5;
    color: var(--color-accent);
}

.diff-closing p:last-child {
    color: var(--color-white);
    font-weight: 500;
}

/* ── Contact ── */
.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: start;
}

.contact-sub {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-muted);
    max-width: 400px;
    margin-top: -16px;
}

/* Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

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

.form-group label {
    font-size: 0.8125rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    color: var(--color-muted);
}

.form-group input,
.form-group textarea {
    font-family: var(--font-main);
    font-size: 1rem;
    color: var(--color-primary);
    background: var(--color-white);
    border: 1px solid var(--color-border);
    padding: 14px 16px;
    transition: border-color 0.2s ease-out;
    outline: none;
    resize: vertical;
}

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

.form-group.has-error input,
.form-group.has-error textarea {
    border-color: #C0392B;
}

.form-error {
    font-size: 0.75rem;
    color: #C0392B;
    display: none;
}

.form-group.has-error .form-error {
    display: block;
}

.btn-submit {
    width: 100%;
    padding: 16px 32px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 0.9375rem;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: opacity 0.2s ease-out;
}

.btn-submit:hover {
    opacity: 0.85;
}

.form-note {
    font-size: 0.8125rem;
    color: var(--color-accent);
    text-align: center;
}

/* Form success */
.form-success {
    display: none;
    text-align: center;
    padding: 64px 32px;
}

.form-success.is-visible {
    display: block;
}

.success-logo {
    height: 48px;
    width: auto;
    margin: 0 auto 24px;
}

.form-success h3 {
    font-size: 1.5rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    margin-bottom: 12px;
}

.form-success p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--color-muted);
}

/* ── Footer ── */
.footer {
    background: var(--color-primary);
    padding: 48px 0;
}

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

.footer-logo {
    height: 28px;
    width: auto;
    filter: brightness(10);
    opacity: 0.6;
}

.footer-copy {
    font-size: 0.75rem;
    color: var(--color-accent);
    opacity: 0.5;
}

/* ═══════════════════════════════════════════
   Responsive
   ═══════════════════════════════════════════ */

/* Tablet */
@media (max-width: 1024px) {
    .capabilities {
        gap: 40px 48px;
    }

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

    .diff-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .contact-layout {
        grid-template-columns: 1fr;
        gap: 48px;
    }
}

/* Mobile */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: block;
    }

    .nav-mobile {
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
    }

    .hero-content {
        padding-top: 100px;
        padding-bottom: 80px;
    }

    .hero-watermark {
        width: 80vw;
    }

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

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

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

    .diff-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .footer-inner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-cta {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-cta .btn {
        text-align: center;
    }

    .trust-statement {
        padding: 24px;
    }
}