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

/* CSS Variables */
:root {
    --color-bg: #ffffff;
    --color-text: #000000;
    --color-text-muted: #666666;
    --color-border: #e0e0e0;
    --color-hover: #f5f5f5;
    --color-error: #dc3545;
    --color-success: #28a745;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Helvetica Neue', Arial, sans-serif;
}

/* Base Styles */
body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

/* Auth Container (login/signup) */
.auth-container {
    max-width: 400px;
    margin: 80px auto;
    padding: 40px;
    border: 1px solid var(--color-border);
}

/* Typography */
h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 20px;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    margin-top: 60px;
    font-weight: 600;
}

p {
    color: var(--color-text);
    line-height: 1.8;
    margin-bottom: 20px;
}

.subtitle {
    color: var(--color-text-muted);
    margin-bottom: 30px;
}

.tagline {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: 60px;
}

/* Links */
a {
    color: var(--color-text);
    text-decoration: none;
    border-bottom: 1px solid var(--color-border);
    transition: border-color 0.2s;
}

a:hover {
    border-bottom-color: var(--color-text);
}

/* Navigation */
nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 30px 0;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 60px;
}

nav .logo {
    font-size: 1.25rem;
    font-weight: 600;
}

nav .nav-links {
    display: flex;
    gap: 30px;
}

nav a {
    border-bottom: none;
    padding: 8px 0;
}

nav a:hover {
    opacity: 0.6;
    border-bottom: none;
}

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

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="file"] {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--color-border);
    font-size: 1rem;
    font-family: var(--font-family);
}

input:focus {
    outline: none;
    border-color: var(--color-text);
}

/* Buttons */
button,
.btn {
    padding: 12px 24px;
    background: var(--color-text);
    color: var(--color-bg);
    border: none;
    font-size: 1rem;
    font-family: var(--font-family);
    cursor: pointer;
    font-weight: 500;
}

button:hover,
.btn:hover {
    opacity: 0.8;
}

button:disabled,
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.submit-btn {
    width: 100%;
    margin-top: 10px;
}

/* Messages */
.message {
    padding: 12px;
    margin-bottom: 20px;
    border-left: 3px solid;
    display: none;
}

.message.error {
    border-color: var(--color-error);
    background: #fff5f5;
    color: var(--color-error);
}

.message.success {
    border-color: var(--color-success);
    background: #f0fff4;
    color: var(--color-success);
}

/* Lists */
ol, ul {
    margin: 20px 0 20px 30px;
}

li {
    margin: 10px 0;
}

/* Code */
code {
    font-family: 'Courier New', monospace;
    background: var(--color-hover);
    padding: 2px 6px;
    border-radius: 3px;
    font-size: 0.9em;
}

/* Footer */
footer {
    margin-top: 80px;
    padding-top: 30px;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.footer-link {
    margin-top: 20px;
    text-align: center;
    color: var(--color-text-muted);
}


/* Upload page */
.upload-area {
    border: 2px dashed var(--color-border);
    padding: 60px 40px;
    text-align: center;
    margin: 30px 0;
    cursor: pointer;
}

.upload-area:hover {
    border-color: var(--color-text);
}

.upload-btn {
    padding: 12px 24px;
    background: var(--color-text);
    color: var(--color-bg);
    border: none;
    cursor: pointer;
    margin-top: 20px;
}

.file-input {
    display: none;
}

.file-info {
    padding: 15px;
    border: 1px solid var(--color-border);
    margin: 20px 0;
    display: none;
}

.file-info.show {
    display: block;
}

.instructions {
    margin-top: 40px;
    padding: 20px;
    border: 1px solid var(--color-border);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

th, td {
    padding: 12px;
    text-align: left;
    border: 1px solid var(--color-border);
}

th {
    background: var(--color-hover);
    font-weight: 600;
}

/* Token Management Section */
.token-section {
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
}

.token-create {
    margin: 30px 0;
    padding: 20px;
    border: 1px solid var(--color-border);
}

.token-create h3 {
    margin-top: 0;
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.btn-primary {
    width: 100%;
    padding: 12px;
    background: var(--color-text);
    color: var(--color-bg);
    border: none;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 500;
}

.btn-primary:hover {
    opacity: 0.8;
}

.token-display {
    margin: 20px 0;
    padding: 20px;
    border: 2px solid var(--color-success);
    background: #f0fff4;
}

.token-display h3 {
    margin-top: 0;
}

.token-display .warning {
    color: var(--color-error);
    font-weight: 600;
    margin: 10px 0;
}

.token-value {
    display: flex;
    gap: 10px;
    margin: 15px 0;
}

.token-value code {
    flex: 1;
    padding: 15px;
    background: #fff;
    border: 1px solid var(--color-border);
    font-family: monospace;
    word-break: break-all;
    font-size: 0.85rem;
}

.btn-copy {
    padding: 12px 24px;
    background: var(--color-text);
    color: var(--color-bg);
    border: none;
    cursor: pointer;
    white-space: nowrap;
}

.btn-copy:hover {
    opacity: 0.8;
}

.token-list {
    margin-top: 30px;
}

.token-list h3 {
    margin-bottom: 20px;
}

.token-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    margin: 10px 0;
    border: 1px solid var(--color-border);
}

.token-info {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex: 1;
}

.token-prefix {
    font-family: monospace;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.token-meta {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.btn-danger {
    background: var(--color-error);
    color: white;
    border: none;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 0.9rem;
}

.btn-danger:hover {
    background: #c82333;
}

.empty {
    color: var(--color-text-muted);
    font-style: italic;
    text-align: center;
    padding: 20px;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 1.5rem;
    }

    .tagline {
        font-size: 1rem;
    }

    h2 {
        font-size: 1.25rem;
        margin-top: 40px;
    }

    nav {
        flex-direction: column;
        gap: 20px;
        align-items: flex-start;
    }

    nav .nav-links {
        flex-direction: column;
        gap: 15px;
    }

    .auth-container {
        margin: 40px auto;
        padding: 30px 20px;
    }

    .token-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }

    .btn-danger {
        width: 100%;
    }

    .token-value {
        flex-direction: column;
    }

    .btn-copy {
        width: 100%;
    }
}