/* ============================================
   LEDGER SUMMIT — Shared Design System
   Used across all static pages
   ============================================ */

/* ---- Google Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ---- Design Tokens ---- */
:root {
    /* Primary palette */
    --navy: #0a1628;
    --navy-light: #121f38;
    --navy-mid: #1a2d4e;
    --blue: #3b6cf5;
    --blue-hover: #2b5ae0;
    --blue-glow: rgba(59, 108, 245, 0.3);
    --blue-subtle: rgba(59, 108, 245, 0.08);

    /* Accents */
    --teal: #06d6a0;
    --teal-glow: rgba(6, 214, 160, 0.2);
    --amber: #f4a261;
    --coral: #ef476f;

    /* Neutrals */
    --white: #ffffff;
    --off-white: #f8f9fc;
    --gray-50: #f0f2f5;
    --gray-100: #e4e7ec;
    --gray-200: #c8cdd6;
    --gray-400: #8892a4;
    --gray-600: #4a5568;
    --gray-800: #1e293b;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.06);
    --glass-border: rgba(255, 255, 255, 0.12);
    --glass-bg-light: rgba(255, 255, 255, 0.85);
    --glass-border-light: rgba(255, 255, 255, 0.5);

    /* Typography */
    --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --h1: clamp(2.5rem, 5vw, 4rem);
    --h2: clamp(1.8rem, 3.5vw, 2.8rem);
    --h3: clamp(1.2rem, 2vw, 1.5rem);
    --body: 1rem;
    --small: 0.875rem;

    /* Spacing */
    --section-pad: clamp(4rem, 8vw, 7rem);
    --container: 1200px;

    /* Effects */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 40px var(--blue-glow);
    --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

body {
    font-family: var(--font);
    font-size: var(--body);
    line-height: 1.7;
    color: var(--gray-800);
    background: var(--white);
    overflow-x: hidden;
}

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

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

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

.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
}

.section-label {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--blue);
    background: var(--blue-subtle);
    padding: 0.4rem 1rem;
    border-radius: 100px;
    margin-bottom: 1rem;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3.5rem;
}

.section-header h2 {
    font-size: var(--h2);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray-400);
    line-height: 1.7;
}

/* Skip link */
.skip-link {
    position: absolute !important;
    top: -200px !important;
    left: 0;
    background: var(--blue);
    color: white;
    padding: 0.5rem 1rem;
    z-index: 9999;
    transition: top 0.2s;
    clip: rect(0, 0, 0, 0);
    overflow: hidden;
    width: 1px;
    height: 1px;
}

.skip-link:focus {
    top: 0 !important;
    clip: auto;
    overflow: visible;
    width: auto;
    height: auto;
}


/* ========================================
   NAVIGATION — Glassmorphic sticky
   ======================================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: all var(--transition);
}

.nav.scrolled {
    background: rgba(10, 22, 40, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 0.6rem 0;
}

/* On inner pages, nav starts with dark bg */
.nav.nav-dark {
    background: rgba(10, 22, 40, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.nav-logo img {
    height: 36px;
    width: auto;
}

.nav-logo span {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--white);
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--white);
}

.nav-cta {
    background: var(--blue);
    color: var(--white) !important;
    padding: 0.6rem 1.4rem;
    border-radius: 100px;
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition);
    box-shadow: 0 4px 16px var(--blue-glow);
}

.nav-cta:hover {
    background: var(--blue-hover);
    transform: translateY(-1px);
    box-shadow: 0 8px 24px var(--blue-glow);
}

/* Hamburger */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    width: 28px;
    height: 20px;
    cursor: pointer;
    z-index: 1001;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all 0.3s;
}

.hamburger.active span:first-child {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:last-child {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 22, 40, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.mobile-nav.open {
    display: flex;
    opacity: 1;
    pointer-events: auto;
}

.mobile-nav a {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 600;
}


/* ========================================
   BUTTONS
   ======================================== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--blue);
    color: var(--white);
    padding: 0.9rem 2rem;
    border-radius: 100px;
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition);
    box-shadow: 0 4px 20px var(--blue-glow);
}

.btn-primary:hover {
    background: var(--blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px var(--blue-glow);
}

.btn-primary.btn-glow {
    position: relative;
    overflow: visible;
}

.btn-primary.btn-glow::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 100px;
    background: linear-gradient(135deg, rgba(80, 150, 255, 0.8), rgba(160, 210, 255, 0.7), rgba(80, 150, 255, 0.8));
    z-index: -1;
    opacity: 0.5;
    filter: blur(12px);
    animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {

    0%,
    100% {
        opacity: 0.4;
        transform: scale(1);
    }

    50% {
        opacity: 0.7;
        transform: scale(1.05);
    }
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.04);
    color: var(--white);
    padding: 0.9rem 2rem;
    border-radius: 100px;
    font-weight: 600;
    font-size: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: all var(--transition);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Outline variant for light backgrounds */
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    color: var(--blue);
    padding: 0.9rem 2rem;
    border-radius: 100px;
    font-weight: 600;
    font-size: 1rem;
    border: 2px solid var(--blue);
    transition: all var(--transition);
}

.btn-outline:hover {
    background: var(--blue);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px var(--blue-glow);
}


/* ========================================
   FOOTER
   ======================================== */
.footer {
    background: var(--navy);
    color: rgba(255, 255, 255, 0.6);
    padding: var(--section-pad) 0 2rem;
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
    padding-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.footer-brand img {
    height: 30px;
    width: auto;
}

.footer-brand span {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--white);
}

.footer-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.footer-links a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition);
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
}

.footer-social {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.5);
    transition: all 0.3s ease;
}

.footer-social a:hover {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
    transform: translateY(-2px);
}


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

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

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

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

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

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


/* ========================================
   SCROLL TO TOP BUTTON
   ======================================== */
.scroll-top-btn {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 900;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--blue);
    color: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px var(--blue-glow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease, background 0.3s ease;
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top-btn:hover {
    background: var(--blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--blue-glow);
}


/* ========================================
   RESPONSIVE — Shared
   ======================================== */
@media (max-width: 768px) {
    :root {
        --h1: clamp(1.8rem, 6vw, 2.5rem);
        --h2: clamp(1.4rem, 4vw, 2rem);
        --section-pad: clamp(3rem, 6vw, 5rem);
    }

    .nav-links {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .btn-primary,
    .btn-secondary,
    .btn-outline {
        justify-content: center;
        padding: 0.8rem 1.5rem;
        font-size: 0.95rem;
    }

    .footer-inner {
        flex-direction: column;
        gap: 1.5rem;
        align-items: center;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: center;
    }

    .footer-social {
        justify-content: center;
    }

    .section-header {
        margin-bottom: 2.5rem;
    }

    .section-header p {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .scroll-top-btn {
        bottom: 1.5rem;
        left: 1rem;
        width: 42px;
        height: 42px;
    }
}

/* Print styles */
@media print {

    .nav,
    .hamburger,
    .mobile-nav,
    .footer {
        display: none !important;
    }

    body {
        color: #000;
        background: #fff;
    }
}