/* ============================================================
   DevHub Design System — Base
   Modern dark UI · RTL · Accessible · Performance-minded
   ============================================================ */

/* ---------- Design Tokens ---------- */
:root {
    /* Surfaces */
    --bg: #070b12;
    --bg-elevated: #0c1220;
    --bg-surface: #111827;
    --bg-surface-2: #1a2234;
    --bg-hover: #1e293b;
    --bg-muted: #0f172a;

    /* Borders */
    --border: rgba(148, 163, 184, 0.12);
    --border-strong: rgba(148, 163, 184, 0.22);
    --border-focus: rgba(59, 130, 246, 0.55);

    /* Text */
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --text-inverse: #0b1220;

    /* Brand */
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-soft: #60a5fa;
    --accent-glow: rgba(59, 130, 246, 0.22);
    --accent-muted: rgba(59, 130, 246, 0.12);

    /* Semantic */
    --success: #22c55e;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #38bdf8;

    /* Radius */
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 22px;
    --radius-full: 9999px;

    /* Shadow */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
    --shadow-glow: 0 0 0 1px var(--border), 0 12px 40px var(--accent-glow);

    /* Layout */
    --page-max: 1240px;
    --page-gutter: clamp(16px, 4vw, 28px);
    --header-h: 68px;

    /* Motion */
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --duration: 0.2s;
    --duration-slow: 0.35s;

    /* Typography */
    --font: "Vazirmatn", "Tahoma", "Segoe UI", system-ui, -apple-system, sans-serif;
    --font-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;
    --lh: 1.65;
}

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

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

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

body {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    font-family: var(--font);
    font-size: 15px;
    line-height: var(--lh);
    color: var(--text);
    background:
        radial-gradient(1200px 600px at 50% -10%, rgba(59, 130, 246, 0.08), transparent 55%),
        radial-gradient(800px 400px at 100% 20%, rgba(14, 165, 233, 0.05), transparent 50%),
        var(--bg);
    background-attachment: fixed;
    overflow-x: hidden;
    text-align: start;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body > main,
body > section,
body > div.page-wrapper {
    width: 100%;
    flex-shrink: 0;
}

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

button,
input,
select,
textarea {
    font: inherit;
    color: inherit;
}

button {
    cursor: pointer;
    border: none;
    background: none;
}

ul,
ol {
    list-style: none;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
    color: var(--text);
    line-height: 1.25;
    font-weight: 700;
    letter-spacing: -0.02em;
}

p {
    color: var(--text-secondary);
}

::selection {
    background: rgba(59, 130, 246, 0.35);
    color: #fff;
}

/* ---------- Links (no global underline animation on every a) ---------- */
a {
    color: var(--accent-soft);
    text-decoration: none;
    transition: color var(--duration) var(--ease);
}

a:hover {
    color: #93c5fd;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* Remove the old global underline pseudo that broke buttons/nav */
a::after {
    content: none !important;
    display: none !important;
}

/* ---------- Layout helpers ---------- */
.container {
    width: 100%;
    max-width: var(--page-max);
    margin-inline: auto;
    padding: var(--page-gutter);
    background: transparent;
    border-radius: 0;
    box-shadow: none;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ---------- Buttons ---------- */
.btn,
.btn-primary,
.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
    padding: 0.7rem 1.35rem;
    border-radius: var(--radius);
    font-size: 0.95rem;
    font-weight: 600;
    line-height: 1;
    text-decoration: none;
    transition:
        background var(--duration) var(--ease),
        color var(--duration) var(--ease),
        border-color var(--duration) var(--ease),
        box-shadow var(--duration) var(--ease),
        transform var(--duration) var(--ease);
    border: 1.5px solid transparent;
    white-space: nowrap;
    user-select: none;
}

.btn-primary,
.btn {
    background: linear-gradient(135deg, var(--accent), #1d4ed8);
    color: #fff;
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover,
.btn:hover {
    background: linear-gradient(135deg, var(--accent-hover), #1e40af);
    color: #fff;
    box-shadow: 0 8px 28px rgba(37, 99, 235, 0.45);
    transform: translateY(-1px);
}

.btn-primary:active,
.btn:active,
.btn-outline:active {
    transform: translateY(0);
}

.btn-outline {
    background: transparent;
    color: var(--accent-soft);
    border-color: rgba(96, 165, 250, 0.45);
}

.btn-outline:hover {
    background: var(--accent-muted);
    color: #93c5fd;
    border-color: var(--accent-soft);
}

.btn-primary::after,
.btn-outline::after,
.btn::after {
    display: none !important;
}

.btn:disabled,
.btn-primary:disabled,
.btn-outline:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ---------- Legacy / shared bits kept for compatibility ---------- */
h2 {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 1.25rem;
}

#userInfo {
    margin-top: 1.25rem;
    padding: 1rem;
    background: var(--bg-surface);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

#userInfo p {
    margin: 0.35rem 0;
}

.logout {
    font-size: larger;
    padding: 5px;
    width: 3rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
    border-radius: 5px;
}

section {
    margin-bottom: 1rem;
}

/* ---------- User chip ---------- */
.user-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: inherit;
    min-width: 0;
    transition: opacity 0.15s ease;
}

.user-chip::after {
    display: none !important;
}

.user-chip:hover {
    opacity: 0.9;
}

.user-chip__avatar {
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), var(--accent-soft));
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    background-size: cover;
    background-position: center;
    line-height: 1;
}

.user-chip__name {
    color: var(--text-muted);
    font-size: 0.82rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-chip:hover .user-chip__name {
    color: var(--accent-soft);
}

/* ---------- Char counter ---------- */
.char-counter {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 6px;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
    font-variant-numeric: tabular-nums;
    transition: color 0.2s ease;
    direction: ltr;
}

.char-counter [data-role="count"] {
    font-weight: 500;
}

.char-counter [data-role="label"] {
    color: var(--text-muted);
    margin-right: 4px;
}

.char-counter [data-role="warning"] {
    margin-right: 4px;
    cursor: help;
}

/* ---------- Skeleton / loading polish ---------- */
@keyframes dh-pulse {
    0%, 100% { opacity: 0.45; }
    50% { opacity: 1; }
}

@keyframes dh-spin {
    to { transform: rotate(360deg); }
}

.home-loading__spinner,
.proj-loading__spinner,
.pp-loading__spinner {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 3px solid var(--border-strong);
    border-top-color: var(--accent);
    animation: dh-spin 0.7s linear infinite;
    margin-inline: auto;
}

/* ---------- Form controls (shared) ---------- */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="url"],
input[type="number"],
textarea,
select {
    width: 100%;
    min-height: 44px;
    padding: 0.65rem 0.9rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-strong);
    background: var(--bg-surface);
    color: var(--text);
    transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-muted);
    outline: none;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-muted);
}

/* ---------- Scrollbar (webkit) ---------- */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: rgba(148, 163, 184, 0.25);
    border-radius: 999px;
    border: 2px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(148, 163, 184, 0.4);
    background-clip: padding-box;
    border: 2px solid transparent;
}

/**
 * Copyright (c) 2026 Sobhan Rasoulzadeh Asl (Sobhan-SRZA / Mr. Sinre)
 *
 * Licensed under the BSD 3-Clause License.
 * See the LICENSE file in the project root for license information.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */