/* --- Global Styles & Variables --- */
:root {
    --primary-color: #FF6B6B;
    --dark-bg: #1A1A1A;
    --dark-card-bg: #282828;
    --dark-text: #E0E0E0;
    --grey-border: #444;
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Roboto', sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    background: url('https://images.unsplash.com/photo-1621605815971-fbc3330058da?q=80&w=1974') no-repeat center center/cover;
    background-color: var(--dark-bg);
    background-blend-mode: overlay;
    color: var(--dark-text);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

a {
    color: var(--primary-color);
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}

/* --- Auth Container & Box --- */
.auth-container {
    width: 100%;
    padding: 20px;
}

.auth-box {
    max-width: 450px;
    margin: 0 auto;
    background: rgba(40, 40, 40, 0.95); /* Semi-transparent dark card */
    padding: 2.5rem 3rem;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    border: 1px solid var(--grey-border);
    backdrop-filter: blur(10px);
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header .logo {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    display: inline-block;
}

.auth-header .logo i {
    margin-right: 0.5rem;
}

.auth-header h1 {
    font-family: var(--font-heading);
    font-size: 2rem;
    color: var(--dark-text);
}

/* --- Form Elements --- */
.input-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: #888;
}

.input-group input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    background: #1e1e1e;
    border: 1px solid var(--grey-border);
    border-radius: 5px;
    color: var(--dark-text);
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.2);
}

.terms-group, .options-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.terms-group label {
    color: #bbb;
}

.terms-group input[type="checkbox"] {
    margin-right: 0.5rem;
}

.btn {
    display: inline-block;
    width: 100%;
    padding: 1rem;
    border-radius: 5px;
    font-weight: 600;
    text-align: center;
    transition: background-color 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
}
.btn-primary:hover {
    background: #FF4A4A;
}

/* --- Separator & Social Login --- */
.separator {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 2rem 0;
    color: #888;
}
.separator::before, .separator::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--grey-border);
}
.separator span {
    padding: 0 1rem;
}

.social-login .btn-social {
    width: 100%;
    padding: 0.8rem;
    border-radius: 5px;
    border: 1px solid var(--grey-border);
    background: transparent;
    color: var(--dark-text);
    font-size: 0.95rem;
    cursor: pointer;
    transition: background-color 0.3s, border-color 0.3s;
    margin-bottom: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
}
.social-login .btn-social i {
    margin-right: 0.8rem;
    font-size: 1.2rem;
}
.social-login .btn-social.google:hover {
    background-color: #4285F4;
    border-color: #4285F4;
}
.social-login .btn-social {
    background-color: #1877F2;
    border-color: #1877F2;
}

/* --- Toggle --- */
.toggle-auth {
    text-align: center;
    margin-top: 1.5rem;
    color: #bbb;
}

/* --- Utility Class --- */
.hidden {
    display: none;
}