@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');

/* Design Variables */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --bg-color: #f9fafb;
    --card-bg: #ffffff;
    --text-color: #1f2937;
    --text-muted: #6b7280;
    --border-color: #d1d5db;
    --drop-hover: #f5f3ff;
}

body {
    font-family: Poppins, 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    transition: background-color 0.3s ease;
}

.upload-card {
    background: var(--card-bg);
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 420px;
    text-align: center;
    transition: background-color 0.3s ease;
}

h2 {
    margin-bottom: 0.5rem;
    font-weight: 700;
}

p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 2rem;
}

.drop-zone {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 160px;
    border: 2px dashed var(--border-color);
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 1.5rem;
}

.drop-zone:hover {
    border-color: var(--primary-color);
    background-color: var(--drop-hover);
}

.drop-zone__input {
    display: none;
}

.drop-zone__prompt {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.submit-btn {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    padding: 14px;
    border: none;
    border-radius: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s, transform 0.1s;
}

.submit-btn:hover {
    background-color: var(--primary-hover);
}

.submit-btn:active {
    transform: scale(0.98);
}

.logout {
    position: fixed;
    top: 20px;
    left: 20px;
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    text-decoration: none;
    
    display: flex !important;
    align-items: center;
    justify-content: center;
    
    padding: 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1000;
    cursor: pointer;
}

.logout svg {
    width: 22px;
    height: 22px;
    display: block;
    fill: red;
    flex-shrink: 0;
}

.logout:hover {
    transform: translateY(-2px) rotate(5deg);
    border-color: var(--primary-color);
    background-color: var(--drop-hover);
}

.qr-container {
    background-color: #ffffff;
    padding: 20px;
    border-radius: 1.25rem;
    display: inline-block;
    margin: 1.5rem 0;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.qr-container:hover {
    transform: scale(1.02);
}

.qr-container img {
    display: block;
    width: 200px;
    height: 200px;
    image-rendering: pixelated;
}

.code-display {
    margin-bottom: 25px;
    padding: 12px 20px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    display: inline-block;
}

.code-display span {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-right: 8px;
}

.code-display strong {
    color: var(--primary-color);
    font-size: 1.4rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.upload-card a.submit-btn {
    text-decoration: none;
    display: inline-block;
    box-sizing: border-box;
    text-align: center;
}

.code-input-field {
    width: 100%;
    padding: 15px;
    margin-bottom: 20px;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-size: 1.2rem;
    font-weight: bold;
    text-align: center;
    letter-spacing: 3px;
    box-sizing: border-box;
    transition: border-color 0.2s;
}

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

.file-info-box {
    background: var(--bg-color);
    padding: 20px;
    border-radius: 1rem;
    margin-bottom: 25px;
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.file-icon {
    background: var(--primary-color);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    font-weight: bold;
    margin-bottom: 10px;
    font-size: 0.8rem;
}

.file-name {
    font-size: 0.95rem;
    color: var(--text-color);
}