:root {
    --accent: #2337ff;
    --accent-dark: #000d8a;
    --gray-light: 229, 233, 240;
    --gray-dark: 34, 41, 57;
    --black: 15, 18, 25;
    --box-shadow: 0 2px 6px rgba(96,115,159,0.25), 0 8px 24px rgba(96,115,159,0.33);
}

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    margin: 0; padding: 0;
    background: linear-gradient(rgba(var(--gray-light), 50%), #fff) no-repeat;
    background-size: 100% 600px;
    color: rgb(var(--gray-dark));
    font-size: 18px; line-height: 1.7;
}

header {
    background: #fff; padding: 0.8em 1.5em;
    box-shadow: 0 2px 8px rgba(var(--black), 5%);
    display: flex; align-items: center; justify-content: space-between;
}

header h1 { margin: 0; font-size: 1.2em; }

.auth-status {
    font-size: 0.85em; display: flex; align-items: center; gap: 0.75em;
}

.auth-status button {
    margin: 0; padding: 0.3em 0.8em; font-size: 0.85em;
    background: #dc3545;
}

.auth-status button:hover { background: #a71d2a; }

main {
    max-width: 720px; margin: 2em auto; padding: 0 1em;
}

.container {
    background: #fff;
    border: 1px solid rgb(var(--gray-light));
    border-radius: 8px;
    padding: 1.5em 2em;
    margin-bottom: 2em;
    box-shadow: var(--box-shadow);
}

.container h2 { margin: 0 0 0.75em 0; }

form {
    display: flex; flex-direction: column;
    gap: 0.5em; max-width: 360px;
}

label { font-weight: 700; font-size: 0.9em; }

input, select {
    padding: 0.5em 0.75em;
    border: 1px solid rgb(var(--gray-light));
    border-radius: 4px; font-size: 1em;
    background: #fff;
}

button {
    margin-top: 0.5em; padding: 0.6em 1.5em;
    background: var(--accent); color: #fff;
    border: none; border-radius: 4px;
    font-size: 1em; font-weight: 700;
    cursor: pointer; align-self: flex-start;
}

button:hover { background: var(--accent-dark); }

.divider {
    display: flex; align-items: center; gap: 1em;
    margin: 1.2em 0; max-width: 360px; color: rgb(var(--gray-dark));
    font-size: 0.85em;
}

.divider::before, .divider::after {
    content: ""; flex: 1; height: 1px;
    background: rgb(var(--gray-light));
}

.jwt-result {
    margin-top: 1em; padding: 0.75em 1em;
    background: rgb(var(--gray-light)); border-radius: 4px;
    font-size: 0.85em; white-space: pre-wrap; min-height: 1.5em;
}

.jwt-result:empty { display: none; }

#word-list { margin-top: 1em; padding-left: 1.2em; }
#word-list li { margin-bottom: 0.3em; }

/* Toast */
.toast {
    position: fixed; top: 1.5em; right: 1.5em;
    padding: 0.75em 1.5em; border-radius: 6px;
    font-weight: 700; font-size: 0.95em;
    z-index: 1000; transition: opacity 0.3s ease;
}

.toast.hidden { opacity: 0; pointer-events: none; }
.toast-success { background: #d4edda; color: #155724; border: 1px solid #c3e6cb; }
.toast-error { background: #f8d7da; color: #721c24; border: 1px solid #f5c6cb; }