:root {
    --bg-dark: #030308;
    --card-bg: #090b14;
    --cyber-yellow: #fcee0a;
    --cyber-cyan: #00f0ff;
    --cyber-magenta: #ff0055;
    --text-light: #ffffff;
    --text-gray: #8f92a9;
    
    --cyan-glow: rgba(0, 240, 255, 0.2);
    --magenta-glow: rgba(255, 0, 85, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Rajdhani', sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    padding: 15px;
    overflow-x: hidden;
    background-image: 
        linear-gradient(rgba(0, 240, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.02) 1px, transparent 1px);
    background-size: 30px 30px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

#auth-toggle, 
.tab-radio {
    display: none;
}

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 3, 7, 0.85);
    backdrop-filter: blur(10px);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    padding: 15px;
}

#auth-toggle:checked ~ .modal-overlay {
    display: flex;
}

.auth-box {
    background: #070912;
    border: 2px solid var(--cyber-cyan);
    box-shadow: 0 0 35px rgba(0, 240, 255, 0.25), inset 0 0 15px rgba(0, 240, 255, 0.05);
    width: 100%;
    max-width: 420px;
    padding: 35px 30px;
    position: relative;
    border-radius: 0;
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 20px;
    font-size: 26px;
    color: var(--text-gray);
    cursor: pointer;
    transition: color 0.2s ease;
}

.close-modal:hover {
    color: var(--cyber-magenta);
    text-shadow: 0 0 8px var(--cyber-magenta);
}

.auth-tabs-headers {
    display: flex;
    border-bottom: 2px solid #141829;
    margin-bottom: 25px;
}

.auth-tabs-headers label {
    flex: 1;
    text-align: center;
    padding: 12px 0;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    color: var(--text-gray);
    letter-spacing: 1.5px;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

#login-radio:checked ~ .auth-tabs-headers label[for="login-radio"],
#register-radio:checked ~ .auth-tabs-headers label[for="register-radio"] {
    color: var(--cyber-cyan);
    border-bottom: 2px solid var(--cyber-cyan);
    text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
}

.auth-form {
    display: none;
    animation: fadeIn 0.3s ease-out forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

#login-radio:checked ~ .auth-form.login-form,
#register-radio:checked ~ .auth-form.register-form {
    display: block;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--text-gray);
    letter-spacing: 1px;
}

.form-group input {
    width: 100%;
    padding: 12px 14px;
    background: #0d101d;
    border: 1px solid #1b203a;
    color: #ffffff;
    border-radius: 0;
    font-size: 15px;
    font-family: 'Rajdhani', sans-serif;
    letter-spacing: 0.5px;
    transition: all 0.25s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--cyber-cyan);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.25);
    background: #111528;
}

.role-options {
    display: flex;
    gap: 12px;
    margin-top: 5px;
}

.role-options input[type="radio"] {
    display: none;
}

.role-btn {
    flex: 1;
    text-align: center;
    padding: 12px;
    border: 1px solid #1b203a;
    background: #0d101d;
    color: var(--text-gray);
    font-weight: 700;
    cursor: pointer;
    border-radius: 0;
    font-size: 14px;
    letter-spacing: 1px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.role-btn:hover {
    border-color: #293056;
    color: var(--text-light);
}

#login-buyer:checked + label.role-btn,
#reg-buyer:checked + label.role-btn {
    border-color: var(--cyber-cyan);
    color: #000000;
    background: var(--cyber-cyan);
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.4);
}

#login-seller:checked + label.role-btn {
    border-color: var(--cyber-yellow);
    color: #000000;
    background: var(--cyber-yellow);
    box-shadow: 0 0 12px rgba(252, 238, 10, 0.4);
}

#reg-seller:checked + label.role-btn {
    border-color: var(--cyber-magenta);
    color: #ffffff;
    background: var(--cyber-magenta);
    box-shadow: 0 0 12px rgba(255, 0, 85, 0.4);
}

.auth-btn {
    width: 100%;
    background: var(--cyber-cyan);
    color: #000000;
    padding: 14px;
    font-size: 16px;
    font-weight: 700;
    border: none;
    cursor: pointer;
    margin-top: 15px;
    clip-path: polygon(0 0, 90% 0, 100% 35%, 100% 100%, 0% 100%);
    transition: all 0.25s ease;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(0, 240, 255, 0.2);
}

.auth-btn:hover {
    box-shadow: 0 0 25px var(--cyber-cyan);
    transform: scale(1.01);
}

.auth-btn.reg-btn {
    background: var(--cyber-magenta);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(255, 0, 85, 0.2);
}

.auth-btn.reg-btn:hover {
    box-shadow: 0 0 25px var(--cyber-magenta);
}

.form-footer {
    text-align: center;
    margin-top: 20px;
    font-size: 14px;
    color: var(--text-gray);
    font-weight: 600;
}

.form-footer label {
    color: var(--cyber-cyan);
    cursor: pointer;
    text-decoration: none;
    font-weight: 700;
    margin-left: 3px;
    transition: color 0.2s ease;
}

.form-footer label:hover {
    color: var(--cyber-yellow);
    }