:root {
            --primary-blue: #00aaff;
            --secondary-blue: #53d6ff;
            --dark-blue: #008ecc;
            --white: #FFFFFF;
            --light-bg: #F8FAFC;
            --light-grey: #E2E8F0;
            --dark-bg: #0F172A;
            --card-dark: #1E293B;
            --text-color: #334155;
            --text-light: #64748B;
            --shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --error-red: #EF4444;
            --success: #10B981;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Poppins', sans-serif;
            background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #bae6fd 100%);
            color: var(--text-color);
            transition: var(--transition);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .header {
            background: var(--white);
            box-shadow: var(--shadow);
            padding: 0 20px;
            height: 70px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 2px solid var(--primary-blue);
        }
        .logo {
            display: flex;
            align-items: center;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary-blue);
            text-decoration: none;
        }
        /* ===== LOGO IMAGE ===== */
        .logo-image {
            width: 42px;
            height: 42px;
            margin-right: 12px;
            border-radius: 50%;
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 10px rgba(0,170,255,0.3);
        }
        .logo-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 50%;
        }
        /* Fallback idan logo.png bai loda ba */
        .logo-image.fallback {
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
            color: white;
            font-weight: bold;
            font-size: 20px;
        }
        .nav-right { display: flex; align-items: center; gap: 16px; }
        .menu-toggle, .theme-toggle {
            background: none; border: none; font-size: 20px;
            color: var(--text-color); cursor: pointer;
            width: 40px; height: 40px; border-radius: 8px;
            display: flex; align-items: center; justify-content: center;
            transition: var(--transition);
        }
        .menu-toggle:hover, .theme-toggle:hover { background: var(--light-grey); color: var(--primary-blue); }
        .sidebar {
            width: 260px; background: var(--white);
            box-shadow: var(--shadow-lg); transition: var(--transition);
            position: fixed; height: 100vh; z-index: 200;
            overflow-y: auto; transform: translateX(-100%);
            left: 0; top: 0; border-right: 3px solid var(--primary-blue);
        }
        .sidebar.open { transform: translateX(0); }

        /* Desktop: sidebar fixed, content shifts */
        @media (min-width: 769px) {
            .sidebar {
                transform: translateX(0) !important;
                top: 70px;
                height: calc(100vh - 70px);
                z-index: 50;
            }
            .main-content {
                margin-left: 260px;
            }
            .footer {
                margin-left: 260px;
            }
            .mobile-overlay {
                display: none !important;
            }
            /* Hide close button a desktop */
            #closeSidebar {
                display: none;
            }
        }
        .sidebar-header {
            padding: 24px 20px; border-bottom: 1px solid var(--light-grey);
            display: flex; align-items: center; justify-content: space-between;
        }
        .sidebar-logo { display: flex; align-items: center; }
        .sidebar-logo .logo-image { margin-right: 12px; }
        .close-sidebar { background: none; border: none; font-size: 20px; color: var(--text-light); cursor: pointer; transition: var(--transition); }
        .close-sidebar:hover { color: var(--primary-blue); }
        .sidebar-menu { padding: 20px 0; }
        .menu-item {
            padding: 12px 20px; display: flex; align-items: center;
            color: var(--text-color); text-decoration: none; transition: var(--transition);
        }
        .menu-item:hover { background-color: rgba(0,170,255,0.05); color: var(--primary-blue); padding-left: 25px; }
        .menu-item i { margin-right: 12px; font-size: 18px; width: 24px; text-align: center; }
        .sidebar-auth {
            padding: 20px; border-top: 1px solid var(--light-grey);
            display: flex; flex-direction: column; gap: 12px;
        }
        .sidebar-btn { padding: 12px 16px; border-radius: 8px; text-decoration: none; text-align: center; font-weight: 500; transition: var(--transition); }
        .sidebar-btn-primary { background: var(--primary-blue); color: white; }
        .sidebar-btn-primary:hover { background: var(--dark-blue); }
        .sidebar-btn-outline { background: transparent; border: 1px solid var(--light-grey); color: var(--text-color); }
        .sidebar-btn-outline:hover { background: var(--light-grey); }
        .mobile-overlay {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.5); z-index: 150;
            opacity: 0; visibility: hidden; transition: var(--transition);
            backdrop-filter: blur(3px);
        }
        .mobile-overlay.active { opacity: 1; visibility: visible; }
        .main-content {
            flex: 1; display: flex; align-items: center;
            justify-content: center; padding: 40px 20px;
        }
        .signup-container { width: 100%; max-width: 550px; }
        .signup-card {
            background: var(--white); border-radius: 19px; padding: 35px;
            box-shadow: var(--shadow-lg); transition: var(--transition);
            animation: fadeInUp 0.6s ease-out;
            border-bottom: 5px solid var(--primary-blue);
            position: relative; overflow: hidden;
        }
        .signup-card::before {
            content: ''; position: absolute; top: 0; left: 0;
            width: 100%; height: 5px;
            background: linear-gradient(90deg, var(--primary-blue), var(--secondary-blue), var(--primary-blue));
        }
        .signup-card:hover {
            box-shadow: 0 20px 25px -5px rgba(0,170,255,0.1), 0 10px 10px -5px rgba(0,170,255,0.04);
            transform: translateY(-5px);
        }
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .signup-header { text-align: center; margin-bottom: 30px; }
        .signup-title { font-size: 28px; font-weight: 700; color: var(--primary-blue); margin-bottom: 8px; }
        .signup-subtitle { color: var(--text-light); font-size: 16px; }
        .form-group { margin-bottom: 20px; position: relative; }
        .form-label {
            position: absolute; left: 50px; top: 16px;
            color: var(--text-light); font-size: 15px;
            pointer-events: none; transition: var(--transition);
            background: var(--white); padding: 0 4px; font-weight: 500;
        }
        .form-control {
            width: 100%; padding: 14px 16px 14px 50px;
            border: 1px solid var(--light-grey); border-radius: 10px;
            font-family: 'Poppins', sans-serif; transition: var(--transition);
            font-size: 15px; background: var(--white);
        }
        .form-control:focus {
            outline: none; border-color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(0,170,255,0.2);
        }
        .form-control:focus + .form-label,
        .form-control:not(:placeholder-shown) + .form-label {
            top: -8px; left: 46px; font-size: 13px;
            color: var(--primary-blue); font-weight: 600;
        }
        /* Gender select label fix */
        select.form-control + .form-label {
            top: -8px; left: 46px; font-size: 13px;
            color: var(--primary-blue); font-weight: 600;
        }
        .form-icon {
            position: absolute; left: 16px; top: 16px;
            color: var(--text-light); font-size: 18px; transition: var(--transition);
        }
        .form-control:focus ~ .form-icon { color: var(--primary-blue); }
        .form-control.error { border-color: var(--error-red); }
        .form-control.success { border-color: var(--success); }
        .password-toggle {
            position: absolute; right: 16px; top: 16px;
            background: none; border: none; color: var(--text-light);
            cursor: pointer; transition: var(--transition);
        }
        .password-toggle:hover { color: var(--primary-blue); }
        .form-row { display: flex; gap: 16px; }
        .form-row .form-group { flex: 1; }
        .form-select {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748B'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
            background-repeat: no-repeat; background-position: right 16px center; background-size: 16px; padding-right: 40px;
        }
        .form-hint { font-size: 12px; color: var(--text-light); margin-top: 6px; margin-left: 50px; }
        .account-type-hint {
            font-size: 12px; color: var(--primary-blue); margin-top: 6px;
            margin-left: 50px; font-weight: 500; display: flex; align-items: center; gap: 5px;
        }
        .form-error {
            font-size: 12px; color: var(--error-red); margin-top: 6px;
            margin-left: 50px; display: none; animation: shake 0.5s ease-in-out;
        }
        @keyframes shake {
            0%, 100% { transform: translateX(0); }
            25% { transform: translateX(-5px); }
            75% { transform: translateX(5px); }
        }
        .form-error.show { display: block; }

        /* ===== GENDER RADIO BUTTONS ===== */
        .gender-group {
            display: flex;
            gap: 12px;
            margin-top: 4px;
        }
        .gender-option {
            flex: 1;
            position: relative;
        }
        .gender-option input[type="radio"] {
            position: absolute;
            opacity: 0;
            width: 0;
            height: 0;
        }
        .gender-option label {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 16px;
            border: 2px solid var(--light-grey);
            border-radius: 10px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
            background: var(--white);
            user-select: none;
        }
        .gender-option label i { font-size: 16px; }
        .gender-option input[type="radio"]:checked + label {
            border-color: var(--primary-blue);
            background: rgba(0,170,255,0.08);
            color: var(--primary-blue);
            box-shadow: 0 0 0 3px rgba(0,170,255,0.15);
        }
        .gender-option label:hover {
            border-color: var(--primary-blue);
            color: var(--primary-blue);
            background: rgba(0,170,255,0.04);
        }
        .gender-label-top {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary-blue);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .gender-label-top i { color: var(--text-light); font-size: 16px; }

        /* ===== PASSWORD STRENGTH ===== */
        .password-strength { margin-top: 10px; }
        .strength-bar-wrap {
            height: 8px;
            background: var(--light-grey);
            border-radius: 4px;
            overflow: hidden;
            margin-bottom: 6px;
        }
        .strength-bar-fill {
            height: 100%;
            width: 0%;
            border-radius: 4px;
            transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1), background 0.5s ease;
        }
        .strength-bar-fill.weak   { background: #ef4444; }
        .strength-bar-fill.medium { background: #f59e0b; }
        .strength-bar-fill.strong { background: #10b981; }
        .strength-text { font-size: 13px; color: var(--text-light); }
        .strength-text .label { font-weight: 600; }
        .strength-text.weak   .label { color: #ef4444; }
        .strength-text.medium .label { color: #f59e0b; }
        .strength-text.strong .label { color: #10b981; }

        .btn {
            padding: 14px 24px; border: none; border-radius: 10px;
            font-family: 'Poppins', sans-serif; font-weight: 500;
            cursor: pointer; transition: var(--transition);
            display: inline-flex; align-items: center; justify-content: center;
            gap: 8px; font-size: 16px; width: 100%;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
            color: white; box-shadow: 0 4px 10px rgba(0,170,255,0.3);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--dark-blue) 0%, var(--primary-blue) 100%);
            transform: translateY(-2px); box-shadow: 0 6px 15px rgba(0,170,255,0.4);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary { background: transparent; border: 1px solid var(--light-grey); color: var(--text-color); }
        .btn-secondary:hover { background: var(--light-grey); }
        .terms-checkbox {
            display: flex; align-items: flex-start; margin: 25px 0; gap: 12px;
        }
        .terms-checkbox input[type="checkbox"] {
            margin-top: 4px; width: 18px; height: 18px;
            accent-color: var(--primary-blue); cursor: pointer;
        }
        .terms-checkbox label { font-size: 14px; color: var(--text-color); line-height: 1.5; }
        .terms-checkbox a { color: var(--primary-blue); text-decoration: none; font-weight: 500; }
        .terms-checkbox a:hover { text-decoration: underline; }
        .login-prompt {
            text-align: center; margin-top: 24px; padding-top: 24px;
            border-top: 1px solid var(--light-grey);
        }
        .login-prompt a { color: var(--primary-blue); text-decoration: none; font-weight: 500; }
        .login-prompt a:hover { text-decoration: underline; }
        /* Dark Mode */
        .dark-mode { background: linear-gradient(135deg, #0c1a2d 0%, #0f172a 50%, #1e293b 100%); color: #E2E8F0; }
        .dark-mode .header, .dark-mode .signup-card, .dark-mode .sidebar { background: var(--card-dark); color: #E2E8F0; }
        .dark-mode .form-control { background: #334155; border-color: #475569; color: #E2E8F0; }
        .dark-mode .form-control:focus { border-color: var(--primary-blue); }
        .dark-mode .form-label { background: var(--card-dark); }
        .dark-mode .gender-option label { background: #334155; border-color: #475569; color: #94A3B8; }
        .dark-mode .gender-option input[type="radio"]:checked + label { background: rgba(0,170,255,0.15); color: var(--primary-blue); }
        .dark-mode .terms-checkbox label { color: #CBD5E1; }
        .dark-mode .login-prompt { border-top-color: #334155; }
        .dark-mode .btn-secondary { border-color: #475569; color: #CBD5E1; }
        .dark-mode .btn-secondary:hover { background: #334155; }
        /* Modal */
        .modal {
            position: fixed; top: 0; left: 0; width: 100%; height: 100%;
            background: rgba(0,0,0,0.5); display: flex;
            align-items: center; justify-content: center;
            z-index: 1000; opacity: 0; visibility: hidden;
            transition: var(--transition); backdrop-filter: blur(5px);
        }
        .modal.active { opacity: 1; visibility: visible; }
        .modal-content {
            background: var(--white); border-radius: 16px; padding: 40px;
            width: 90%; max-width: 450px; box-shadow: var(--shadow-lg);
            transform: translateY(-20px) scale(0.9); transition: var(--transition);
            text-align: center; position: relative; overflow: hidden;
            border: 2px solid var(--primary-blue);
        }
        .modal.active .modal-content { transform: translateY(0) scale(1); }
        .modal-icon { font-size: 60px; color: var(--primary-blue); margin-bottom: 20px; }
        .modal-title { font-size: 24px; font-weight: 700; color: var(--primary-blue); margin-bottom: 10px; }
        .modal-message { color: var(--text-light); margin-bottom: 25px; line-height: 1.6; }
        .modal-actions { display: flex; gap: 12px; }
        .modal-actions .btn { flex: 1; }

        @media (max-width: 768px) {
            .form-row { flex-direction: column; gap: 0; }
            .signup-card { padding: 25px; }
            .modal-actions { flex-direction: column; }
        }
        @media (max-width: 480px) {
            .signup-title { font-size: 24px; }
            .main-content { padding: 20px 16px; }
        }

/* ===== SIDEBAR (matching privacy/terms style) ===== */
.sb-group { padding: 10px 20px 4px; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.8px; color: var(--text-light); }
.sidebar-divider { border: none; border-top: 1px solid var(--light-grey); margin: 6px 0; }
.menu-item { padding: 11px 20px; display: flex; align-items: center; color: var(--text-color); font-size: 13.5px; font-weight: 500; transition: var(--transition); border-left: 3px solid transparent; text-decoration: none; }
.menu-item:hover, .menu-item.active { background: rgba(0,170,255,0.07); color: var(--primary-blue); border-left-color: var(--primary-blue); padding-left: 24px; }
.menu-item i { margin-right: 12px; font-size: 16px; width: 20px; text-align: center; }




/* ===== FOOTER (matching privacy/terms pages) ===== */
.footer { background: var(--white); padding: 40px 20px 20px; border-top: 1px solid var(--light-grey); }
.footer-content { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; max-width: 1200px; margin: 0 auto; }
.footer-section h3 { font-size: 17px; margin-bottom: 16px; color: var(--primary-blue); display: flex; align-items: center; gap: 8px; font-weight: 700; }
.footer-section p { color: var(--text-light); margin-bottom: 14px; font-size: 13.5px; line-height: 1.7; }
.footer-brand-logo { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-brand-logo img { width: 46px; height: 46px; object-fit: contain; border-radius: 50%; }
.footer-brand-logo span { font-size: 22px; font-weight: 700; color: var(--primary-blue); }
.footer-cac { display: flex; align-items: flex-start; gap: 10px; background: rgba(16,185,129,0.07); border: 1px solid rgba(16,185,129,0.25); border-radius: 10px; padding: 10px 12px; margin-bottom: 16px; }
.footer-cac i { color: #10B981; font-size: 20px; flex-shrink: 0; margin-top: 2px; }
.footer-cac-title { font-size: 11px; font-weight: 700; color: #10B981; }
.footer-cac-num { font-size: 11px; color: var(--text-light); margin-top: 2px; line-height: 1.5; }
.footer-cac-num strong { color: var(--text-color); }
.social-links { display: flex; gap: 10px; margin-top: 4px; flex-wrap: wrap; }
.social-link { width: 36px; height: 36px; border-radius: 50%; background: var(--light-grey); display: flex; align-items: center; justify-content: center; color: var(--text-color); font-size: 14px; transition: var(--transition); text-decoration: none; }
.social-link:hover { background: var(--primary-blue); color: white; transform: translateY(-3px); }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-light); font-size: 14px; transition: var(--transition); display: flex; align-items: center; gap: 8px; text-decoration: none; }
.footer-links a i { width: 16px; text-align: center; }
.footer-links a:hover { color: var(--primary-blue); padding-left: 5px; }
.footer-bottom { text-align: center; padding-top: 20px; margin-top: 30px; border-top: 1px solid var(--light-grey); color: var(--text-light); font-size: 14px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; max-width: 1200px; margin-left: auto; margin-right: auto; }
.footer-bottom-links { display: flex; gap: 20px; }
.footer-bottom-links a { color: var(--text-light); font-size: 13px; transition: var(--transition); text-decoration: none; }
.footer-bottom-links a:hover { color: var(--primary-blue); }
.footer-cac-tag { display: flex; align-items: center; gap: 5px; font-size: 13px; color: #10B981; font-weight: 600; }
@media (max-width: 768px) {
    .footer-content { grid-template-columns: 1fr; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .footer-bottom-links { justify-content: center; }
}