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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    background-image:
        radial-gradient(ellipse at 20% 50%, var(--accent-glow, rgba(59,130,246,0.08)) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, var(--accent-glow, rgba(59,130,246,0.05)) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 100%, var(--accent-glow, rgba(59,130,246,0.06)) 0%, transparent 40%);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

a {
    color: var(--accent-primary);
    text-decoration: none;
    background-image: linear-gradient(var(--accent-primary), var(--accent-primary));
    background-size: 0% 1px;
    background-repeat: no-repeat;
    background-position: left bottom;
    transition: background-size 0.3s ease, color 0.2s ease;
}

a:hover {
    color: var(--accent-secondary);
    background-size: 100% 1px;
}

ul, ol {
    list-style: none;
}

code, kbd, pre, samp {
    font-family: 'JetBrains Mono', 'Courier New', monospace;
}

/* ===== Custom Scrollbar ===== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 3px;
    opacity: 0.6;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

/* Firefox scrollbar */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--accent-primary) transparent;
}

/* ===== Container ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    width: 100%;
}

/* ===== Navigation Bar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--gradient-header, var(--header-bg));
    backdrop-filter: blur(20px) saturate(1.8);
    -webkit-backdrop-filter: blur(20px) saturate(1.8);
    color: var(--header-text);
    box-shadow:
        0 4px 24px rgba(0, 0, 0, 0.3),
        0 1px 40px var(--glow-color, rgba(59,130,246,0.08));
}

/* Animated accent line at top of navbar */
.navbar__accent-line {
    height: 3px;
    background: linear-gradient(
        90deg,
        var(--accent-primary),
        var(--accent-secondary, var(--accent-primary)),
        var(--accent-primary),
        var(--accent-secondary, var(--accent-primary)),
        var(--accent-primary)
    );
    background-size: 200% 100%;
    animation: navAccentShift 6s ease-in-out infinite;
}

@keyframes navAccentShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.navbar__inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.25rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

/* ===== Brand / Logo ===== */
.navbar__brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--header-text);
    text-decoration: none;
    background: none;
    transition: none;
}

.navbar__brand:hover {
    color: var(--header-text);
    background: none;
}

.navbar__logo-wrap {
    position: relative;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.navbar__logo {
    font-size: 1.35rem;
    display: inline-block;
    position: relative;
    z-index: 2;
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    filter: drop-shadow(0 0 8px var(--glow-color, rgba(59,130,246,0.6)));
}

.navbar__logo-ring {
    position: absolute;
    inset: 0;
    border-radius: 12px;
    border: 2px solid var(--accent-primary);
    opacity: 0.4;
    transform: rotate(0deg);
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.3s;
}

.navbar__brand:hover .navbar__logo {
    transform: scale(1.2) rotate(-8deg);
}

.navbar__brand:hover .navbar__logo-ring {
    transform: rotate(45deg) scale(1.1);
    opacity: 0.7;
}

.navbar__text {
    display: flex;
    flex-direction: column;
    line-height: 1.15;
}

.navbar__title {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: var(--header-text);
}

.navbar__title-accent {
    background: var(--gradient-accent, linear-gradient(135deg, var(--accent-primary), var(--accent-secondary, var(--accent-primary))));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.navbar__tagline {
    font-size: 0.6rem;
    font-weight: 500;
    opacity: 0.4;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    display: none;
}

@media (min-width: 576px) {
    .navbar__tagline {
        display: block;
    }
}

/* ===== Right Side ===== */
.navbar__right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

/* Live pulse dot */
.navbar__pulse {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--success, #22c55e);
    box-shadow: 0 0 6px var(--success, #22c55e);
    animation: navPulse 2.5s ease-in-out infinite;
}

@keyframes navPulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 6px var(--success, #22c55e); }
    50% { opacity: 0.4; box-shadow: 0 0 2px var(--success, #22c55e); }
}

.navbar__settings {
    color: var(--header-text);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: background 0.2s, border-color 0.3s, transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
    overflow: hidden;
}

.navbar__settings::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-accent);
    opacity: 0;
    transition: opacity 0.3s;
    border-radius: inherit;
}

.navbar__settings:hover {
    color: #fff;
    border-color: var(--accent-primary);
    transform: rotate(90deg);
    background: rgba(255, 255, 255, 0.06);
}

.navbar__settings:hover::before {
    opacity: 0.2;
}

.navbar__settings-icon {
    font-size: 1.2rem;
    position: relative;
    z-index: 1;
    line-height: 1;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    padding-top: 80px;
    padding-bottom: 2rem;
}

/* ===== Footer ===== */
.site-footer {
    background: transparent;
    border-top: 1px solid var(--border-color);
    padding: 1rem 0;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.75rem;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.site-footer:hover {
    opacity: 0.85;
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.5rem 1.25rem;
    border: none;
    border-radius: 10px;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: 'Inter', system-ui, sans-serif;
    cursor: pointer;
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.2s ease,
                background 0.2s ease;
    text-decoration: none;
    line-height: 1.4;
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.12) 0%, transparent 60%);
    pointer-events: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--glow-color, rgba(0,0,0,0.2));
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--gradient-accent, var(--accent-primary));
    color: #fff;
    box-shadow: 0 2px 8px var(--accent-glow, rgba(49, 130, 206, 0.3));
}

.btn-primary:hover {
    color: #fff;
    box-shadow: 0 6px 24px var(--accent-glow, rgba(49, 130, 206, 0.4));
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.btn-secondary:hover {
    background: var(--border-color);
    border-color: var(--accent-primary);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
    color: #fff;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.4);
    color: #fff;
}

.btn-success {
    background: linear-gradient(135deg, var(--success), #16a34a);
    color: #fff;
    box-shadow: 0 2px 8px rgba(34, 197, 94, 0.3);
}

.btn-success:hover {
    box-shadow: 0 6px 20px rgba(34, 197, 94, 0.4);
    color: #fff;
}

.btn-sm {
    padding: 0.3rem 0.75rem;
    font-size: 0.8125rem;
    border-radius: 8px;
}

/* ===== Inputs ===== */
input[type="text"],
input[type="number"],
input[type="email"],
input[type="search"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 0.55rem 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.9375rem;
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1),
                0 0 0 3px var(--accent-glow, rgba(49, 130, 206, 0.2));
}

/* ===== Error Page ===== */
.error-page {
    text-align: center;
    padding: 4rem 1rem;
}

.error-page h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 800;
}

.error-page p {
    margin-bottom: 2rem;
    color: var(--text-secondary);
}

/* ===== Gizmo Full Page ===== */
.gizmo-full-page {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg-card);
    backdrop-filter: var(--card-bg-blur, blur(12px));
    -webkit-backdrop-filter: var(--card-bg-blur, blur(12px));
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.gizmo-full-page h2 {
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 700;
}

/* ===== Utility Classes ===== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.hidden { display: none !important; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

/* ===== Responsive ===== */
@media (max-width: 575px) {
    .container {
        padding: 0 0.75rem;
    }

    .navbar__inner {
        padding: 0 0.75rem;
    }
}