/* ============================================================
   Priveo Marketing Website - styles.css
   Dark mode civic intelligence aesthetic
   ============================================================ */

/* ------------------------------------------------------------
   1. Root Variables + Reset
   ------------------------------------------------------------ */

:root {
    /* Colors */
    --color-bg: #08080D;
    --color-bg-secondary: #0E0E15;
    --color-bg-tertiary: #15151F;
    --color-surface: #12121B;
    --color-text: #F0F0F5;
    --color-text-secondary: #9898A8;
    --color-text-dim: #5E5E72;
    --color-accent: #4F6EF7;
    --color-accent-hover: #6580FF;
    --color-accent-subtle: rgba(79, 110, 247, 0.08);
    --color-accent-glow: rgba(79, 110, 247, 0.15);
    --color-border: rgba(255, 255, 255, 0.06);
    --color-border-hover: rgba(255, 255, 255, 0.12);

    /* Layer colors */
    --color-who: #3B82F6;
    --color-where: #EF4444;
    --color-what: #22C55E;
    --color-how: #A855F7;

    /* Typography */
    --font-primary: -apple-system, BlinkMacSystemFont, 'Avenir Next', 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', monospace;

    /* Spacing (8px base) */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    --space-32: 8rem;

    /* Layout */
    --max-width: 1200px;
    --content-padding: 5%;
    --radius: 12px;
    --radius-sm: 8px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;
}

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

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

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ------------------------------------------------------------
   2. Global Typography + Utilities
   ------------------------------------------------------------ */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--content-padding);
}

.section {
    padding: var(--space-24) 0;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.section-heading {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    line-height: 1.15;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-6);
}

.section-subheading {
    font-size: clamp(1.05rem, 1.5vw, 1.2rem);
    color: var(--color-text-secondary);
    line-height: 1.6;
    max-width: 640px;
}

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

.text-center .section-subheading {
    margin-left: auto;
    margin-right: auto;
}

/* Word reveal for headings */
.word-reveal .word {
    display: inline-block;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ------------------------------------------------------------
   3. Scroll Progress Bar
   ------------------------------------------------------------ */

.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: transparent;
    z-index: 1001;
}

.scroll-progress__bar {
    height: 100%;
    background: var(--color-accent);
    transform-origin: left;
    transform: scaleX(0);
    will-change: transform;
}

/* ------------------------------------------------------------
   4. Navigation
   ------------------------------------------------------------ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-5) var(--content-padding);
    transition: background var(--transition-base), backdrop-filter var(--transition-base);
}

.nav--scrolled {
    background: rgba(8, 8, 13, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.nav__inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo img {
    height: 44px;
    width: auto;
    filter: invert(1);
    mix-blend-mode: screen;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav__link {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

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

.nav__cta {
    font-size: 0.85rem;
    font-weight: 600;
    padding: var(--space-2) var(--space-5);
    background: var(--color-accent);
    color: #fff;
    border-radius: var(--radius-sm);
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.nav__cta:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
}

/* Mobile nav toggle */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
}

.nav__toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 1px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

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

.nav__toggle.active span:nth-child(2) {
    opacity: 0;
}

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

/* ------------------------------------------------------------
   5. Hero
   ------------------------------------------------------------ */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--space-24);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero__content {
    position: relative;
    max-width: 760px;
}

.hero__heading {
    font-size: clamp(2.5rem, 5.5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.025em;
    margin-bottom: var(--space-6);
    opacity: 0;
    transform: translateY(24px);
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.1s;
}

.hero__subtitle {
    font-size: clamp(1.1rem, 1.8vw, 1.3rem);
    color: var(--color-text-secondary);
    line-height: 1.6;
    max-width: 580px;
    margin-bottom: var(--space-10);
    opacity: 0;
    transform: translateY(24px);
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.3s;
}

.hero__actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex-wrap: wrap;
    opacity: 0;
    transform: translateY(24px);
    animation: fadeUp 0.8s ease forwards;
    animation-delay: 0.5s;
}

/* Buttons (shared) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.95rem;
    font-weight: 600;
    padding: var(--space-3) var(--space-6);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

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

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

.btn--secondary:hover {
    border-color: var(--color-text-dim);
    transform: translateY(-2px);
}

.btn--large {
    font-size: 1.05rem;
    padding: var(--space-4) var(--space-8);
}

/* ------------------------------------------------------------
   6. Problem Section
   ------------------------------------------------------------ */

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

.problem__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.problem__card {
    padding: var(--space-8);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: border-color var(--transition-base);
}

.problem__card:hover {
    border-color: var(--color-border-hover);
}

.problem__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
    border-radius: var(--radius-sm);
    background: var(--color-accent-subtle);
}

.problem__icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-accent);
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.problem__card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
}

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

/* ------------------------------------------------------------
   7. Product / Layers Section
   ------------------------------------------------------------ */

.product__layers {
    margin-top: var(--space-12);
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.layer {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.layer:nth-child(even) {
    direction: rtl;
}

.layer:nth-child(even) > * {
    direction: ltr;
}

.layer__info {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.layer__indicator {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.layer__dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.layer__name {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.layer__heading {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.layer__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.layer__list li {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    padding-left: var(--space-5);
    position: relative;
}

.layer__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    opacity: 0.6;
}

/* Layer-specific colors */
.layer--who .layer__dot,
.layer--who .layer__list li::before { background: var(--color-who); }
.layer--who .layer__name { color: var(--color-who); }

.layer--where .layer__dot,
.layer--where .layer__list li::before { background: var(--color-where); }
.layer--where .layer__name { color: var(--color-where); }

.layer--what .layer__dot,
.layer--what .layer__list li::before { background: var(--color-what); }
.layer--what .layer__name { color: var(--color-what); }

.layer--how .layer__dot,
.layer--how .layer__list li::before { background: var(--color-how); }
.layer--how .layer__name { color: var(--color-how); }

.layer__visual {
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.layer__visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* ------------------------------------------------------------
   8. Features Section
   ------------------------------------------------------------ */

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

.features__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.feature-card {
    padding: var(--space-8);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: transform var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.feature-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
    border-radius: var(--radius-sm);
    background: var(--color-accent-subtle);
}

.feature-card__icon svg {
    width: 24px;
    height: 24px;
    stroke: var(--color-accent);
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--space-4);
}

.feature-card__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.feature-card__list li {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    padding-left: var(--space-5);
    position: relative;
}

.feature-card__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55em;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-accent);
    opacity: 0.5;
}

/* ------------------------------------------------------------
   9. Metrics Section
   ------------------------------------------------------------ */

.metrics {
    background: var(--color-bg-tertiary);
    position: relative;
    overflow: hidden;
}

.metrics::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--color-accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.metrics__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
    position: relative;
}

.metric {
    text-align: center;
}

.metric__value {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.1;
    margin-bottom: var(--space-2);
    font-variant-numeric: tabular-nums;
}

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

/* ------------------------------------------------------------
   10. Use Cases Section
   ------------------------------------------------------------ */

.use-cases__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
    margin-top: var(--space-12);
}

.use-case-card {
    padding: var(--space-8);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: border-color var(--transition-base);
}

.use-case-card:hover {
    border-color: var(--color-accent);
}

.use-case-card__icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
    border-radius: var(--radius-sm);
    background: var(--color-accent-subtle);
}

.use-case-card__icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-accent);
    fill: none;
    stroke-width: 1.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.use-case-card h3 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: var(--space-3);
}

.use-case-card p {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* ------------------------------------------------------------
   11. Footer / CTA
   ------------------------------------------------------------ */

.cta-section {
    background: var(--color-bg-secondary);
    text-align: center;
}

.cta-section .section-heading {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}


.footer {
    padding: var(--space-8) 0;
    border-top: 1px solid var(--color-border);
}

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

.footer__copy {
    font-size: 0.8rem;
    color: var(--color-text-dim);
}



/* ------------------------------------------------------------
   12. Reveal Animations + Keyframes
   ------------------------------------------------------------ */

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

.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.reveal-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left.revealed {
    opacity: 1;
    transform: translateX(0);
}

.reveal-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-right.revealed {
    opacity: 1;
    transform: translateX(0);
}

/* Stagger children */
.reveal-stagger > * {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal-stagger.revealed > *:nth-child(1) { transition-delay: 0s; }
.reveal-stagger.revealed > *:nth-child(2) { transition-delay: 0.1s; }
.reveal-stagger.revealed > *:nth-child(3) { transition-delay: 0.2s; }
.reveal-stagger.revealed > *:nth-child(4) { transition-delay: 0.3s; }

.reveal-stagger.revealed > * {
    opacity: 1;
    transform: translateY(0);
}

/* ------------------------------------------------------------
   13. Media Queries (Responsive)
   ------------------------------------------------------------ */

@media (max-width: 1024px) {
    .layer {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .layer:nth-child(even) {
        direction: ltr;
    }

    .metrics__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-6);
    }
}

@media (max-width: 768px) {
    .section {
        padding: var(--space-16) 0;
    }

    /* Nav mobile */
    .nav__toggle {
        display: flex;
    }

    .nav__links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        align-items: flex-start;
        padding: var(--space-24) var(--space-8);
        gap: var(--space-6);
        background: var(--color-bg-secondary);
        border-left: 1px solid var(--color-border);
        transition: right var(--transition-base);
    }

    .nav__links.open {
        right: 0;
    }

    /* Grids stack */
    .problem__grid,
    .features__grid {
        grid-template-columns: 1fr;
    }

    .use-cases__grid {
        grid-template-columns: 1fr;
    }

    .metrics__grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero__heading {
        font-size: clamp(2rem, 8vw, 2.5rem);
    }

    .footer__inner {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

@media (max-width: 480px) {
    .metrics__grid {
        grid-template-columns: 1fr 1fr;
    }

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

/* ------------------------------------------------------------
   14. Reduced Motion
   ------------------------------------------------------------ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }

    .reveal,
    .reveal-left,
    .reveal-right,
    .reveal-stagger > * {
        opacity: 1;
        transform: none;
    }

    .hero__heading,
    .hero__subtitle,
    .hero__actions {
        opacity: 1;
        transform: none;
    }

    .word-reveal .word {
        opacity: 1;
        transform: none;
    }

    .scroll-progress {
        display: none;
    }
}