/* =========================
   Design Tokens – Pointercrate-style palette
========================= */
:root {
    /* Primary brand colors */
    --color-background: #f4f5f7;
    --color-background-card: #ffffff;
    --color-background-sidebar: #f8f9fb;
    --color-on-background: #1f2937;
    --color-on-background-muted: #6b7280;
    --color-background-hover: #eef0f5;
    --color-on-background-hover: #1f2937;

    /* Accent – Pointercrate blue */
    --color-primary: #4a90d9;
    --color-primary-dark: #2c6fad;
    --color-primary-light: #7ab3e8;
    --color-on-primary: #ffffff;

    /* Navy header */
    --color-header-bg: #1a1a2e;
    --color-header-accent: #16213e;

    /* Borders & shadows */
    --color-border: #dde1ea;
    --color-shadow: rgba(0, 0, 0, 0.08);
    --color-shadow-hover: rgba(0, 0, 0, 0.16);

    /* Semantic */
    --color-error: #e53e3e;
    --color-on-error: #ffffff;
    --color-success: #38a169;

    /* Card/UI radius & sizing */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-smooth: 0.25s ease;
}

/* =========================
   Dark Mode
========================= */
html.dark,
body.dark,
main.dark,
header.dark,
.auth-modal-overlay.dark,
footer.dark {
    color-scheme: dark;

    --color-background: #0d0d1a;
    --color-background-card: #131325;
    --color-background-sidebar: #0f0f20;
    --color-on-background: #e5e7eb;
    --color-on-background-muted: #9ca3af;
    --color-background-hover: #1c1c35;
    --color-on-background-hover: #f9fafb;

    --color-primary: #5ba3f5;
    --color-primary-dark: #3d7de0;
    --color-primary-light: #93c5fd;

    --color-border: #2a2a4a;
    --color-shadow: rgba(0, 0, 0, 0.4);
    --color-shadow-hover: rgba(0, 0, 0, 0.6);

    --color-error: #fc8181;
    --color-on-error: #1a1a2e;
}

/* =========================
   Base Layout
========================= */
html,
body {
    height: 100%;
    background: var(--color-background-card);
}

body {
    display: flex;
    flex-direction: column;
    margin: 0;
    background: var(--color-background-card);
    color: var(--color-on-background);
    font-family: 'Nunito', 'Lexend Deca', sans-serif;
    transition:
        background var(--transition-smooth),
        color var(--transition-smooth);
}

/* =========================
   Header
========================= */
header {
    display: flex;
    align-items: center;
    padding: 0 2.5rem;
    height: 4rem;
    background-color: var(--color-header-bg);
    color: #ffffff;
    gap: 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.4);
    transition: background var(--transition-smooth);
}

header.dark {
    background-color: #08081a;
}

header .logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    flex-shrink: 0;
}

header .logo h2 {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #ffffff;
    font-family: 'Lexend Deca', sans-serif;
}

header .logo p {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.05em;
    line-height: 1;
    font-family: 'Nunito', sans-serif;
    font-weight: 400;
    margin-top: 2px;
}

header .nav {
    flex: 1;
}

/* =========================
   Main Layout
========================= */
main {
    flex: 1;
    display: block;
    /* Default to block, let pages define their grids */
    background-color: var(--color-background);
    background-image: url('../background/main-dark.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    background-repeat: no-repeat;
    color: var(--color-on-background);
    overflow: hidden;
    position: relative;
    width: 100%;
}

/* Dark overlay for better text readability over background */
main::after {
    content: '';
    position: fixed;
    inset: 0;
    background: linear-gradient(180deg,
            rgba(13, 13, 26, 0.85) 0%,
            rgba(13, 13, 26, 0.75) 50%,
            rgba(13, 13, 26, 0.85) 100%);
    z-index: 0;
    pointer-events: none;
}

/* Subtle decorative top stripe */
main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary-dark), var(--color-primary), var(--color-primary-light));
    z-index: 10;
    pointer-events: none;
}

/* =========================
   Column scroll zones
========================= */
main>div {
    overflow-y: auto;
    position: relative;
    z-index: 1;
}

/* Ensure all direct children of main are above the overlay */
main>* {
    position: relative;
    z-index: 1;
}

/* Left sidebar – level list */
main>div:first-child {
    /*  background: rgba(15, 15, 32, 0.7); */
    /*backdrop-filter: blur(10px); */
    -webkit-backdrop-filter: blur(10px);
    /* border-right: 1px solid rgba(255, 255, 255, 0.05); */
}

/* Right sidebar – meta */
main>div:last-child {
    /* background: rgba(15, 15, 32, 0.7); */
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    /* border-left: 1px solid rgba(255, 255, 255, 0.05); */
}

/* Submit page overrides the 3-col grid and acts as its own scroll root */
main.page-submit {
    display: block;
    overflow-y: auto;
    height: 100%;
}

/* =========================
   Spinner
========================= */
.spinner {
    display: flex;
    align-items: center;
    justify-content: center;
    grid-column: span 3;
}

/* =========================
   Inputs (global)
========================= */
input[type="checkbox"] {
    height: 1.25rem;
    width: 1.25rem;
    cursor: pointer;
    margin: 0;
    accent-color: var(--color-primary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"] {
    background: var(--color-background-card);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 0.65rem 0.9rem;
    color: var(--color-on-background);
    /* font-family: inherit;
    font-size: 0.95rem; */
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    outline: none;
    width: 100%;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
input[type="number"]:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(74, 144, 217, 0.18);
}

/* =========================
   Tabs – Pointercrate underline style
========================= */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--color-border);
}

.tabs button {
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.tabs .active,
.tabs .selected {
    border-bottom: 2px solid var(--color-primary) !important;
    color: var(--color-primary) !important;
    font-weight: 700;
}

/* =========================
   Global Scrollbar Styling
========================= */
/* Webkit browsers (Chrome, Edge, Safari) */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: transparent;
    /* Transparent background so site background shows through */
}

::-webkit-scrollbar-thumb {
    background-color: var(--color-header-bg);
    /* Match main header color */
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: padding-box;
    /* Ensures the border makes the thumb look thinner */
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-header-accent);
    /* Lighter shade on hover */
}

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