/* ===== Theme Variables & Tokens ===== */
:root {
    --bg-body: #f3f4f6;
    --bg-card: #ffffff;
    --text-main: #111827;
    --text-muted: #6b7280;
    --border-color: #f3f4f6;
    --border-focus: #4f46e5;
    --input-bg: #f9fafb;
    --input-border: #d1d5db;
    --input-focus-bg: #ffffff;
    --tab-bg: #f3f4f6;
    --tab-active-bg: #ffffff;
    --tab-text: #6b7280;
    --tab-active-text: #4f46e5;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-text: #ffffff;
    --btn-secondary-bg: #e5e7eb;
    --btn-secondary-text: #1f2937;
    --btn-secondary-hover: #d1d5db;
    --danger-bg: #fef2f2;
    --danger-border: #fca5a5;
    --danger-text: #b91c1c;
    --shadow-card: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-tab: 0 1px 3px rgba(0, 0, 0, 0.1);
    --overlay: #4f46e5;
    --shape-fill: #f3f4f6;
    --transition: all 0.2s ease-in-out;
}

.dark {
    --bg-body: #111827;
    --bg-card: #1f2937;
    --text-main: #ffffff;
    --text-muted: #9ca3af;
    --border-color: #374151;
    --border-focus: #6366f1;
    --input-bg: #374151;
    --input-border: #4b5563;
    --input-focus-bg: #1f2937;
    --tab-bg: #111827;
    --tab-active-bg: #1f2937;
    --tab-text: #9ca3af;
    --tab-active-text: #818cf8;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --primary-text: #ffffff;
    --btn-secondary-bg: #374151;
    --btn-secondary-text: #f9fafb;
    --btn-secondary-hover: #4b5563;
    --danger-bg: rgba(127, 29, 29, 0.3);
    --danger-border: #991b1b;
    --danger-text: #f87171;
    --shadow-card: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    --shadow-tab: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shape-fill: #111827;
}

/* ─────────────────────────────────────────────
   1. Local Font Face Declarations
   ───────────────────────────────────────────── */
@font-face {
    font-family: 'Inter';
    src: url('../fonts/Inter-VariableFont_slnt,wght.ttf') format('truetype');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Vazirmatn';
    src: url('../fonts/Vazirmatn-VariableFont_wght.ttf') format('truetype');
    font-weight: 100 900;
    font-style: normal;
    font-display: swap;
}

/* ─────────────────────────────────────────────
   2. Language-Based Font Routing
   ───────────────────────────────────────────── */
html[lang="en"] body {
    font-family: 'Inter', system-ui, sans-serif;
}

html[lang="fa"] body,
html[lang="ps"] body {
    font-family: 'Vazirmatn', Tahoma, sans-serif;
}

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

body {
    background-color: var(--bg-body);
    color: var(--text-main);
    min-height: 100vh;
    display: flex; align-items: center; justify-content: center;
    transition: background-color 0.3s, color 0.3s;
    overflow-x: hidden; /* حل مشکل اسکرول افقی هنگام تغییر زبان */
}

/* ===== Utilities ===== */
.text-center { text-align: center; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.mt-1 { margin-top: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mt-6 { margin-top: 1.5rem; }
.mx-4 { margin-left: 1rem; margin-right: 1rem; }
.hidden { display: none !important; }
.relative { position: relative; }
.z-10 { z-index: 10; }
.text-main { color: var(--text-main); }
.text-link { color: var(--primary); text-decoration: none; transition: var(--transition); }
.text-link:hover { text-decoration: underline; }
.dark .text-link { color: var(--tab-active-text); }
.text-ltr { direction: ltr; text-align: left; }
[dir="rtl"] .text-ltr { text-align: left; }

/* ===== Background Decor ===== */
.auth-one-bg-position {
    position: fixed; top: 0; left: 0; width: 100%; height: 380px;
    background-image: url('../images/auth-one-bg.webp');
    background-position: center; background-size: cover; z-index: -2;
}
.bg-overlay {
    position: absolute; inset: 0; background-color: var(--overlay); opacity: 0.8; z-index: -1;
}
.shape {
    position: absolute; bottom: -1px; left: 0; right: 0; z-index: 1; pointer-events: none;
}
.shape svg { width: 100%; height: auto; display: block; }
.shape svg path { fill: var(--shape-fill); transition: fill 0.3s; }

/* ===== Auth Card ===== */
.auth-card {
    width: 100%; max-width: 28rem;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    box-shadow: var(--shadow-card);
    padding: 2rem;
    transition: var(--transition);
}
.logo-box {
    width: 4rem;
    height: 4rem;
    margin: 0 auto 1rem;
}
.logo-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}
.subtitle { color: var(--text-muted); }

/* ===== Tabs ===== */
.tab-bar {
    display: flex; padding: 0.25rem;
    background-color: var(--tab-bg);
    border-radius: 0.75rem; margin-bottom: 2rem;
}
.tab-btn {
    flex: 1; padding: 0.75rem; border: none; background: transparent;
    color: var(--tab-text); font-size: 0.875rem; font-weight: 600;
    border-radius: 0.5rem; cursor: pointer; transition: var(--transition);
}
.tab-btn.active {
    background-color: var(--tab-active-bg); color: var(--tab-active-text);
    box-shadow: var(--shadow-tab);
}
.tab-content { display: none; animation: fadeIn 0.3s ease-out; }
.tab-content.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* ===== Forms ===== */
.form-group { margin-bottom: 1.5rem; }
.form-group label {
    display: block; font-size: 0.875rem; font-weight: 600;
    margin-bottom: 0.5rem; color: var(--text-main);
}
.req { color: #ef4444; }
.input-control {
    width: 100%; padding: 0.875rem 1rem; font-size: 0.9375rem;
    border: 1px solid var(--input-border); border-radius: 0.5rem;
    background-color: var(--input-bg); color: var(--text-main);
    transition: var(--transition);
}
.input-control:focus {
    outline: none; border-color: var(--border-focus); background-color: var(--input-focus-bg);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

/* ===== Password Wrapper (Show/Hide Eye Icon) ===== */
.pass-wrapper { position: relative; width: 100%; }
.pass-wrapper .input-control { padding-inline-end: 2.5rem !important; }
.eye-icon { position: absolute; top: 50%; transform: translateY(-50%); right: 0.75rem; cursor: pointer; color: var(--text-muted); z-index: 5; transition: var(--transition); padding: 4px; }
[dir="rtl"] .eye-icon { right: auto !important; left: 0.75rem !important; }
.eye-icon:hover { color: var(--primary); transform: translateY(-50%) scale(1.1); }
.eye-icon.active-eye { color: var(--primary); }
.eye-icon.active-eye:hover { color: var(--primary-hover); transform: translateY(-50%) scale(1.1); }

/* ===== Buttons ===== */
.btn-primary, .btn-cancel {
    width: 100%; padding: 0.875rem; font-weight: 700; font-size: 1rem;
    border: none; border-radius: 0.75rem; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    transition: var(--transition);
}
.btn-primary { background-color: var(--primary); color: var(--primary-text); box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); }
.btn-primary:hover:not(:disabled) { background-color: var(--primary-hover); transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.btn-primary.dark-invert { background-color: #111827; }
.dark .btn-primary.dark-invert { background-color: var(--primary); }
.btn-primary.dark-invert:hover:not(:disabled) { background-color: #1f2937; }
.dark .btn-primary.dark-invert:hover:not(:disabled) { background-color: var(--primary-hover); }

.btn-cancel { background-color: var(--btn-secondary-bg); color: var(--btn-secondary-text); }
.btn-cancel:hover { background-color: var(--btn-secondary-hover); }

.spinner { width: 1.25rem; height: 1.25rem; margin-inline-start: 0.5rem; animation: spin 1s linear infinite; }
@keyframes spin { 100% { transform: rotate(360deg); } }

/* ===== Alerts ===== */
.lock-alert {
    background-color: var(--danger-bg); border: 1px solid var(--danger-border);
    color: var(--danger-text); padding: 0.75rem 1rem; margin-bottom: 1.5rem;
    border-radius: 0.5rem; font-size: 0.875rem; font-weight: 700; text-align: center;
}

/* ===== OTP Modal ===== */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(15, 23, 42, 0.75); backdrop-filter: blur(4px);
    display: none; align-items: center; justify-content: center; z-index: 1000;
    opacity: 0; transition: opacity 0.3s;
}
.modal-overlay.active { display: flex; opacity: 1; }
.modal-box {
    background: var(--bg-card); border: 1px solid var(--border-color);
    padding: 2rem; border-radius: 1rem; max-width: 26rem; width: 90%;
    text-align: center; box-shadow: var(--shadow-card);
    transform: scale(0.95); transition: transform 0.3s;
}
.modal-overlay.active .modal-box { transform: scale(1); }

.modal-email {
    display: inline-block;
    color: var(--primary);
    font-size: 1.05rem;
    font-weight: 800;
    background: rgba(79, 70, 229, 0.1);
    padding: 0.25rem 0.75rem;
    margin: 0.5rem 0.25rem 0;
    border-radius: 0.5rem;
    direction: ltr; 
    unicode-bidi: embed; 
    letter-spacing: 0.5px;
    word-break: break-all;
}

.otp-inputs { display: flex; justify-content: center; gap: 0.5rem; }
.otp-box {
    width: 3rem; height: 3.5rem; text-align: center; font-size: 1.5rem; font-weight: 700;
    border: 2px solid var(--input-border); border-radius: 0.5rem;
    background: var(--input-bg); color: var(--text-main); transition: var(--transition); caret-color: transparent;
}
.otp-box:focus { border-color: var(--border-focus); outline: none; caret-color: var(--primary); }
.timer { font-size: 1.25rem; font-family: monospace; font-weight: 700; color: var(--primary); }
.timer.expired { color: var(--danger-text); }

/* ===== Top Controls & Language Buttons ===== */
.top-controls { position: fixed; top: 1rem; right: 1rem; display: flex; gap: 0.5rem; z-index: 20; }
[dir="rtl"] .top-controls { right: auto; left: 1rem; }

.lang-group {
    display: flex; background: var(--bg-card); border: 1px solid var(--border-color);
    border-radius: 0.5rem; overflow: hidden;
}
.lang-btn {
    background: transparent; border: none; padding: 0.5rem 0.75rem;
    color: var(--text-main); font-family: inherit; font-weight: 600; font-size: 0.875rem;
    cursor: pointer; transition: var(--transition);
}
.lang-btn:hover { background: var(--btn-secondary-bg); }
.lang-btn.active { background: var(--primary); color: #fff; }

.icon-btn {
    background: var(--bg-card); border: 1px solid var(--border-color); color: var(--text-main);
    border-radius: 0.5rem; padding: 0.5rem; cursor: pointer; transition: var(--transition);
    display: flex; align-items: center; justify-content: center;
}
.icon-btn:hover { background: var(--btn-secondary-bg); }
.dark .sun-icon { display: block; }
.dark .moon-icon { display: none; }
.sun-icon { display: none; }
.moon-icon { display: block; }

/* ===== Honeypot ===== */
.hidden-pot { position: absolute; opacity: 0; top: -9999px; left: -9999px; z-index: -1; }

@media (max-width: 480px) {
    .auth-card { padding: 1.5rem; }
    .otp-inputs { gap: 0.25rem; }
    .otp-box { width: 2.5rem; height: 3rem; font-size: 1.25rem; }
    .top-controls { flex-direction: column; align-items: flex-end; }
    [dir="rtl"] .top-controls { align-items: flex-start; }
}