:root {
    --primary-blue: #0f63dc;
    --primary-indigo: #0b4fc2;
    --primary-cyan: #2ca8ff;
    --ink-900: #111827;
    --text-gray: #4b5563;
    --text-soft: #667085;
    --border-gray: #e5e7eb;
    --white: #ffffff;
    --font-sans: 'Manrope', 'Segoe UI', sans-serif;
    --font-display: 'Space Grotesk', 'Manrope', sans-serif;
}

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

body {
    min-width: 320px;
    min-height: 100vh;
    background:
        radial-gradient(circle at 7% 4%, rgba(44, 168, 255, 0.18), transparent 29rem),
        radial-gradient(circle at 98% 88%, rgba(15, 99, 220, 0.1), transparent 27rem),
        #ffffff;
    color: var(--text-gray);
    font-family: var(--font-sans);
    line-height: 1.6;
}

.error-page {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    overflow: hidden;
    padding: 0 clamp(1.25rem, 5vw, 5rem);
}

.error-nav,
.error-footer {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin: 0 auto;
    max-width: 1200px;
    width: 100%;
}

.error-nav { padding: 1.35rem 0; }

.brand {
    align-items: center;
    color: var(--ink-900);
    display: inline-flex;
    font-size: 1.5rem;
    font-weight: 700;
    gap: 0.1rem;
    text-decoration: none;
}

.brand-mark {
    display: inline-flex;
    height: 2.65rem;
    width: 2.65rem;
}

.brand-mark img {
    height: 100%;
    object-fit: contain;
    width: 100%;
}

.brand-name {
    background: linear-gradient(135deg, var(--primary-blue), #0a47aa);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-link {
    color: var(--text-gray);
    font-size: 0.92rem;
    font-weight: 700;
    text-decoration: none;
    transition: color 0.2s ease;
}

.nav-link span {
    color: var(--primary-blue);
    margin-left: 0.3rem;
}

.nav-link:hover,
.nav-link:focus-visible { color: var(--primary-blue); }

.error-content {
    align-items: center;
    display: flex;
    flex: 1;
    flex-direction: column;
    justify-content: center;
    margin: -1rem auto 0;
    max-width: 680px;
    padding: 5rem 0 6rem;
    text-align: center;
}

.error-code {
    color: rgba(15, 99, 220, 0.1);
    font-family: var(--font-display);
    font-size: clamp(8.5rem, 24vw, 15rem);
    font-weight: 700;
    letter-spacing: -0.09em;
    line-height: 0.72;
    margin-right: 0.5em;
    user-select: none;
}

.link-badge {
    align-items: center;
    background: var(--white);
    border: 1px solid rgba(15, 99, 220, 0.18);
    border-radius: 1rem;
    box-shadow: 0 18px 45px rgba(15, 99, 220, 0.12);
    display: flex;
    gap: 0.45rem;
    justify-content: center;
    margin: -1.3rem 0 1.7rem;
    padding: 0.9rem 1.15rem;
    transform: rotate(-4deg);
}

.link-dot {
    background: var(--primary-blue);
    border-radius: 50%;
    height: 0.55rem;
    width: 0.55rem;
}

.link-line {
    background: var(--primary-cyan);
    border-radius: 1rem;
    display: block;
    height: 0.35rem;
}

.link-line-long { width: 2.7rem; }
.link-line-short { width: 1.45rem; }

.eyebrow {
    color: var(--primary-blue);
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

h1 {
    color: var(--ink-900);
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    letter-spacing: -0.045em;
    line-height: 1.08;
    margin: 0.6rem 0 1rem;
}

.error-message {
    color: var(--text-gray);
    font-size: 1.05rem;
    max-width: 510px;
}

.error-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    justify-content: center;
    margin-top: 2rem;
}

.button {
    align-items: center;
    border-radius: 0.75rem;
    display: inline-flex;
    font-size: 0.95rem;
    font-weight: 700;
    justify-content: center;
    min-height: 3.1rem;
    padding: 0.75rem 1.35rem;
    text-decoration: none;
    transition: box-shadow 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.button:hover,
.button:focus-visible { transform: translateY(-2px); }

.button-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-indigo));
    box-shadow: 0 10px 22px rgba(15, 99, 220, 0.24);
    color: var(--white);
}

.button-primary:hover,
.button-primary:focus-visible { box-shadow: 0 14px 28px rgba(15, 99, 220, 0.32); }

.button-primary span {
    font-size: 1.2rem;
    margin-left: 0.55rem;
}

.button-secondary {
    background: var(--white);
    border: 1px solid var(--border-gray);
    color: var(--ink-900);
}

.button-secondary:hover,
.button-secondary:focus-visible {
    border-color: var(--primary-blue);
    color: var(--primary-blue);
}

.error-footer {
    color: var(--text-soft);
    font-size: 0.78rem;
    gap: 1rem;
    padding: 1.35rem 0;
}

.footer-rule {
    background: var(--border-gray);
    flex: 1;
    height: 1px;
}

@media (max-width: 520px) {
    .error-nav { padding-top: 1rem; }
    .brand { font-size: 1.25rem; }
    .brand-mark { height: 2.3rem; width: 2.3rem; }
    .error-content { padding: 3.5rem 0 4rem; }
    .error-code { font-size: 8rem; }
    .error-message { font-size: 0.95rem; }
    .error-actions { align-items: stretch; flex-direction: column; width: 100%; }
    .button { width: 100%; }
    .error-footer { align-items: flex-start; flex-direction: column; gap: 0.35rem; }
    .footer-rule { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}