:root {
    /* Color Palette Variables */
    --color-background: #F7F7FF; /* Light cream for main background, buttons, flash */
    --color-background-border: #ebebff;
    --color-background-border-between: #d6d6ff;
    --color-background-box-shadow: #c2c2ff;
    --color-text-dark: #14110F; /* Dark charcoal for text, borders, and success states */
    --color-text-light: #F7F7FF; /* Same as background, used for text on dark surfaces */
    --color-primary: #0066ff; /* Main blue for buttons */
    --color-light-blue-two: #c2daff;
    --color-lighter-blue: #d6e7ff;
    --color-blue-pastel: #334195;
    --color-blue-pastel-light-one: #7684d0;
    --color-blue-pastel-light-two: #959fdb;
    --color-green-pastel: #02a147;
    --color-green-pastel-light-one: #02ca59;
    --color-green-pastel-light-two: #02de62;
    --color-green-pastel-light-three: rgba(235, 255, 243, 0.4);
    --color-danger: #E3170A;
    --color-danger-between: #f86c62;
    --color-danger-light: #fba39d;
    --color-disabled-bg: #dcd8d0; /* Beige for disabled upload button */
}


body {
    font-family: "Quicksand", sans-serif;
    font-optical-sizing: auto;
    font-style: normal;
    background-color: var(--color-background);
    color: var(--color-text-dark);
    margin: 0;
    padding: 2rem 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
}

.container {
    margin: 0 auto 2rem auto;
    background-color: var(--color-background-box-shadow);
    border-radius: 25px;
    margin: 0; /* Let the grid gap handle spacing */
    background-color: var(--color-background-box-shadow);
    padding: 2rem 3rem;
    width: 100%;
    max-width: 600px;
    margin-bottom: 2rem; /* Space between containers */
}

h1, h2 {
    text-align: center;
    color: #222;
}

h2 {
    margin: 0;
}

#login-view h2, #signup-view h2 {
    margin-bottom: 1rem;
}

.app-section {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.auth-forms {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

label {
    font-weight: 600;
}

.file-input-hidden {
    width: 0.1px;
    height: 0.1px;
    opacity: 0;
    overflow: hidden;
    position: absolute;
    z-index: -1;
}

.file-input-label {
    padding: 0.9rem;
    border: none;
    border-radius: 15px;
    background-color: var(--color-background-border-between);
    color: var(--color-text-dark);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition-duration: 0.3s;
    text-align: center;
    display: inline-block;
}

    .file-input-label:hover {
        background-color: var(--color-background-border);
        transform: translateY(-2px);
    }

input[type="text"], input[type="email"], input[type="password"], input[type="file"] {
    padding: 0.8rem;
    background-color: var(--color-background-border-between);
    border-radius: 15px;
    font-size: 1rem;
    outline: none;
    border: none;
    font-family: "Quicksand", sans-serif;
    font-optical-sizing: auto;
    font-style: normal;
    transition-duration: 0.3s;
}

    input[type="text"]:focus, input[type="email"]:focus, input[type="password"]:focus, input[type="file"]:focus {
        background-color: var(--color-background-border);
    }

button {
    font-family: "Quicksand", sans-serif;
    font-optical-sizing: auto;
    font-style: normal;
    font-size: 1rem;
    background: var(--color-danger-between);
    color: var(--color-text-light);
    text-decoration: none;
    font-weight: 800;
    border-radius: 15px;
    border: 3px solid var(--color-danger-light);
    cursor: pointer;
    transition: all 0.15s ease;
    position: relative;
    box-shadow: -4px 8px 0 var(--color-danger);
    transform: translateY(-4px) translateX(0);
    padding: 1rem 1.5rem;
}

    button:hover {
        transform: translateY(0) translateX(-2px);
        box-shadow: -2px 4px 0 var(--color-danger);
    }

    /* ADDED: Disabled state for buttons */
    button:disabled {
        cursor: not-allowed;
    }


#submit-exam-button, #login-button, #signup-button {
    background: var(--color-blue-pastel-light-one);
    color: var(--color-text-light);
    border: 3px solid var(--color-blue-pastel-light-two);
    box-shadow: -4px 8px 0 var(--color-blue-pastel);
    transform: translateY(0) translateX(4px);
    padding: 1rem 1.5rem;
    /* ADDED: Flex properties to align spinner and text */
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.8rem;
}

    #submit-exam-button:hover, #login-button:hover, #signup-button:hover, #submit-exam-button:disabled, #login-button:disabled, #signup-button:disabled {
        transform: translateY(4px) translateX(2px);
        box-shadow: -2px 4px 0 var(--color-blue-pastel);
    }


.auth-toggle {
    text-align: left;
    margin-top: 1.5rem;
}

    .auth-toggle a {
        color: var(--color-primary);
        cursor: pointer;
        text-decoration: none;
    }

        .auth-toggle a:hover {
            text-decoration: underline;
        }

#app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1rem;
    border-bottom: 3px solid var(--color-background-border-between)
}

    #app-header span {
        font-weight: 800;
    }

.hidden {
    display: none !important;
}

/* REMOVED: Old status-log styles */

.spinner {
    /* MODIFIED: Sized for button, removed auto margin */
    border: 4px solid rgba(255, 255, 255, 0.4);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border-left-color: var(--color-text-light);
    animation: spin 1s ease infinite;
    margin: 0;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

/* --- NEW STYLES FOR EXAM CARDS --- */
#exam-list-section h2 {
    margin-bottom: 1rem;
}


#exam-cards-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.exam-card {
    display: block;
    padding: 1.5rem;
    border-radius: 15px;
    text-decoration: none;
    background-color: var(--color-background-border-between);
    transition-duration: 0.3s;
}

    .exam-card:hover {
        background-color: var(--color-background-border);
        transform: translateY(-2px);
    }

    .exam-card h3 {
        margin: 0 0 0.5rem 0;
        color: var(--color-primary);
    }

    .exam-card p {
        margin: 0;
        font-size: 0.9rem;
        color: #666;
    }