/*=============== VARIABLES CSS ===============*/
:root {
    --primary-color: hsl(210, 70%, 60%); /* Vibrant Blue accent */
    --primary-color-dark: hsl(210, 70%, 50%); /* Darker Blue for hover */
    --text-color-light: hsl(0, 0%, 95%); /* Near white */
    --text-color-dark: hsl(0, 0%, 20%);
    --bg-dark: hsl(240, 8%, 10%); /* Very deep dark blue-grey (almost black) */
    --bg-medium: hsl(240, 8%, 18%); /* Slightly lighter dark blue-grey */
    --card-bg: linear-gradient(145deg, hsl(240, 8%, 18%) 0%, hsl(240, 8%, 25%) 100%); /* Subtle blue-black gradient for cards */

    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Open Sans', sans-serif;

    --border-radius-small: 0.25rem;
    --border-radius-medium: 0.5rem;
    --border-radius-large: 1rem;

    --shadow-light: 0 4px 10px rgba(0, 0, 0, 0.2);
    --shadow-medium: 0 6px 15px rgba(0, 0, 0, 0.3);
}

/*=============== BASE STYLES ===============*/
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-color-light);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

/*=============== AUTH CONTAINER & BOX ===============*/
.auth-container, .dashboard-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    width: 100%;
    padding: 1rem;
}

.auth-box, .dashboard-box {
    background: var(--card-bg);
    border-radius: var(--border-radius-large);
    padding: 2.5rem;
    box-shadow: var(--shadow-medium);
    text-align: center;
    max-width: 450px;
    width: 100%;
}

.auth-title, .dashboard-title {
    font-family: var(--font-heading);
    font-size: 2.2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.auth-form h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--text-color-light);
}

.input-group {
    text-align: left;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-color-light);
}

.input-group input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--border-radius-medium);
    background-color: var(--bg-medium);
    color: var(--text-color-light);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.input-group input::placeholder {
    color: var(--text-color-light);
    opacity: 0.7;
}

.input-group input:focus {
    border-color: var(--primary-color);
    outline: none;
}

.button {
    display: inline-block;
    background-color: var(--primary-color);
    color: var(--text-color-light);
    padding: 0.9rem 1.5rem;
    border: none;
    border-radius: var(--border-radius-medium);
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 600;
    transition: background-color 0.3s ease, transform 0.2s ease;
    box-shadow: var(--shadow-light);
    width: 100%; /* Make button full width */
    margin-top: 1rem;
}

.button:hover {
    background-color: var(--primary-color-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.auth-switch {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    color: var(--text-color);
}

.auth-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s ease;
}

.auth-switch a:hover {
    color: var(--primary-color-dark);
}

/* Utility classes */
.hidden {
    display: none !important;
}

/*=============== DASHBOARD STYLES ===============*/
.dashboard-message {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: var(--text-color-light);
}

.dashboard-message span {
    font-weight: 600;
    color: var(--primary-color);
}

.dashboard-content {
    background-color: var(--bg-medium);
    padding: 1.5rem;
    border-radius: var(--border-radius-medium);
    margin-bottom: 2rem;
    font-style: italic;
    color: var(--text-color);
}

.logout-button {
    width: auto;
    padding: 0.8rem 2rem;
}

/*=============== MESSAGE BOX STYLES ===============*/
.message-box {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--card-bg);
    color: var(--text-color-light);
    padding: 20px 30px;
    border-radius: var(--border-radius-large);
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    z-index: 1000;
    text-align: center;
    font-family: var(--font-body);
    font-size: var(--normal-font-size);
    display: flex;
    flex-direction: column;
    gap: 15px;
    max-width: 90%;
    opacity: 0; /* Start hidden */
    transition: opacity 0.3s ease-in-out;
}

.message-box.show {
    opacity: 1;
}

.message-box h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.message-box button {
    background-color: var(--primary-color);
    color: var(--text-color-light);
    border: none;
    padding: 10px 20px;
    border-radius: var(--border-radius-medium);
    cursor: pointer;
    font-weight: var(--font-semi-bold);
    transition: background-color 0.3s ease;
}

.message-box button:hover {
    background-color: var(--primary-color-dark);
}

/*=============== RESPONSIVE DESIGN ===============*/
@media (max-width: 600px) {
    .auth-box, .dashboard-box {
        padding: 1.5rem;
        margin: 1rem;
    }

    .auth-title, .dashboard-title {
        font-size: 1.8rem;
    }

    .auth-form h2 {
        font-size: 1.5rem;
    }

    .button {
        padding: 0.7rem 1rem;
        font-size: 1rem;
    }

    .logout-button {
        padding: 0.7rem 1.5rem;
    }
}