/* إعداد المتغيرات اللونية للوضع الفاتح (الافتراضي) */
:root {
    --bg-body: #f8fafc;
    --bg-container: #ffffff;
    --text-main: #1e293b;
    --text-sub: #64748b;
    --border-color: #cbd5e1;
    --input-bg: #ffffff;
    --box-bg: #f8fafc;
    --success-bg: #f0fdf4;
    --success-border: #86efac;
    --success-text: #166534;
    --btn-disabled: #cbd5e1;
}

/* إعداد المتغيرات اللونية للوضع المظلم (تلقائي) */
@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
        --bg-body: #0f172a;
        --bg-container: #1e293b;
        --text-main: #f8fafc;
        --text-sub: #94a3b8;
        --border-color: #334155;
        --input-bg: #0f172a;
        --box-bg: #0f172a;
        --success-bg: rgba(34, 197, 94, 0.1);
        --success-border: #22c55e;
        --success-text: #4ade80;
        --btn-disabled: #475569;
    }
}

body { font-family: 'Cairo', sans-serif; margin: 0; background-color: var(--bg-body); display: flex; justify-content: center; align-items: center; min-height: 100vh; padding: 40px 20px; box-sizing: border-box; transition: background-color 0.3s;}
.auth-container { background: var(--bg-container); padding: 40px; border-radius: 16px; box-shadow: 0 10px 30px rgba(0,0,0,0.08); width: 100%; max-width: 550px; border-top: 5px solid #22c55e; transition: background-color 0.3s;}
.auth-container h1 { margin: 0 0 10px 0; color: var(--text-main); font-size: 26px; text-align: center;}
.auth-container p.subtitle { color: var(--text-sub); font-size: 14px; margin-bottom: 35px; text-align: center;}

.promo-banner { background-color: var(--success-bg); border: 1px dashed var(--success-border); color: var(--text-main); padding: 12px; border-radius: 8px; text-align: center; font-size: 14px; font-weight: 600; margin-bottom: 25px; display: flex; align-items: center; justify-content: center; gap: 10px;}
.promo-banner i { font-size: 20px; color: #22c55e; }

.form-group { margin-bottom: 20px; text-align: right; position: relative; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--text-main); font-size: 14px; }
.form-group input, .form-group select { width: 100%; padding: 12px 15px; border: 1px solid var(--border-color); border-radius: 8px; font-family: 'Cairo', sans-serif; box-sizing: border-box; transition: all 0.3s ease; font-size: 14px; background-color: var(--input-bg); color: var(--text-main);}
.form-group input:focus, .form-group select:focus { outline: none; border-color: #22c55e; box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.1); }
.form-group input:disabled { background-color: var(--box-bg); color: var(--text-sub); cursor: not-allowed; border-color: var(--border-color); }

.radio-group { display: flex; gap: 15px; }
.radio-option { flex: 1; position: relative; cursor: pointer; }
.radio-option input { position: absolute; opacity: 0; cursor: pointer; height: 0; width: 0; }
.radio-box { border: 1px solid var(--border-color); border-radius: 8px; padding: 12px; text-align: center; transition: 0.3s; font-size: 14px; font-weight: 600; color: var(--text-sub); background-color: var(--input-bg); height: stretch; align-items: center; align-content: center; }
.radio-option:hover .radio-box { border-color: var(--text-sub); background-color: var(--box-bg); }
.radio-option input:checked ~ .radio-box { border-color: #22c55e; color: var(--text-main); background-color: var(--success-bg); box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.1); }
.radio-box i { margin-left: 5px; color: inherit;}

.hint-text { font-size: 12px; color: var(--text-sub); margin-top: 6px; display: block; transition: 0.3s; line-height: 1.5;}
.hint-error { color: #ef4444; font-weight: 600; }
.hint-success { color: #22c55e; font-weight: 600; }

.input-wrapper { display: flex; gap: 10px; position: relative;}
.btn-action { background-color: #3b82f6; color: white; border: none; border-radius: 8px; padding: 0 20px; font-family: 'Cairo'; font-weight: bold; cursor: pointer; transition: 0.3s; white-space: nowrap;}
.btn-action:hover { background-color: #2563eb; transform: translateY(-1px);}
.btn-action:disabled { background-color: var(--btn-disabled); cursor: not-allowed; transform: none;}
.verified-badge { position: absolute; left: 15px; top: 14px; color: #22c55e; font-size: 20px; display: none; }
.otp-section { background-color: var(--success-bg); padding: 20px; border-radius: 10px; border: 1px dashed var(--success-border); margin-top: 15px; display: none; transition: all 0.3s;}
.otp-section h4 { margin: 0 0 15px 0; font-size: 14px; color: var(--text-main); }
.otp-input-group { display: flex; gap: 10px; }
.otp-input-group input { text-align: center; letter-spacing: 12px; font-size: 22px; font-weight: 900; color: var(--success-text); background-color: var(--success-bg); border: 2px dashed #22c55e !important; border-radius: 8px; box-shadow: 0 4px 6px -1px rgba(34, 197, 94, 0.1);}
.otp-input-group input:focus {border-color: #22c55e !important; box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2);}

.timer-text { font-size: 13px; color: #ef4444; font-weight: bold; margin-top: 10px; display: block; }

.password-wrapper { position: relative; }
.password-wrapper input { padding-left: 45px; }
.toggle-password { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); cursor: pointer; color: var(--text-sub); font-size: 16px; transition: 0.2s; padding: 5px; }
.toggle-password:hover { color: #3b82f6; }

.checkbox-group { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 20px; padding: 10px; background: var(--box-bg); border-radius: 8px;}
.checkbox-group input { width: 18px; height: 18px; margin-top: 2px; cursor: pointer; accent-color: #22c55e;}
.checkbox-group label { font-size: 13px; color: var(--text-sub); line-height: 1.6; cursor: pointer;}
.checkbox-group a { color: #3b82f6; text-decoration: none; font-weight: bold; }
.checkbox-group a:hover { text-decoration: underline; }

.submit-btn { width: 100%; background-color: #22c55e; color: white; border: none; padding: 15px; font-size: 16px; font-weight: 700; border-radius: 8px; cursor: pointer; transition: 0.3s; box-shadow: 0 4px 6px -1px rgba(34, 197, 94, 0.2); margin-top: 10px;}
.submit-btn:hover { background-color: #16a34a; transform: translateY(-2px); box-shadow: 0 6px 8px -1px rgba(34, 197, 94, 0.3); }
.submit-btn:disabled { background-color: var(--btn-disabled); cursor: not-allowed; transform: none; box-shadow: none; color: var(--bg-body);}

.auth-links { margin-top: 25px; font-size: 14px; color: var(--text-sub); text-align: center; }
.auth-links a { color: #22c55e; text-decoration: none; font-weight: 700; transition: 0.2s;}
.auth-links a:hover { color: #16a34a; }
.back-link { display: block; text-align: center; margin-top: 20px; color: var(--text-sub); text-decoration: none; font-size: 13px; transition: 0.2s;}
.back-link:hover { opacity: 0.7; }

.modal { display: none; position: fixed; z-index: 1000; left: 0; top: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.7); align-items: center; justify-content: center; backdrop-filter: blur(4px); }
.modal-content { background-color: var(--bg-container); padding: 35px 25px; border-radius: 16px; width: 90%; max-width: 400px; text-align: center; box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1); border-top: 5px solid #3b82f6; animation: modalFadeIn 0.3s ease;}
.modal-content h3 { color: var(--text-main); margin: 20px 0; font-size: 17px; line-height: 1.6;}
.btn-alert-ok { background-color: #3b82f6; color: white; border: none; padding: 12px 35px; border-radius: 8px; font-family: 'Cairo'; font-weight: bold; cursor: pointer; margin-top: 10px; font-size: 15px; transition: 0.3s; }
.btn-alert-ok:hover { background-color: #2563eb; }

@media (max-width: 500px) {
    .input-wrapper, .otp-input-group { flex-direction: column; gap: 12px; }
    .btn-action { width: 100%; padding: 12px; }
    .verified-badge { top: 14px; }
}

@keyframes modalFadeIn { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }