:root {
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #212529;
    --text-muted: #6c757d;
    --primary-color: #0d6efd;
    --primary-hover: #0b5ed7;
    --border-color: #dee2e6;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 600px;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

textarea {
    width: 100%;
    height: 200px;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    resize: none;
    font-family: inherit;
    font-size: 1rem;
    margin-bottom: 20px;
    outline: none;
    transition: border-color 0.2s;
}

textarea:focus {
    border-color: var(--primary-color);
}

.options {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
}

.option-group {
    flex: 1;
}

label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

select, input[type="text"], input[type="password"] {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    outline: none;
}

.passcode-toggle {
    margin-bottom: 20px;
}

.passcode-toggle label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: var(--text-color);
}

.btn-primary, .btn-secondary {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

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

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

.btn-secondary {
    background-color: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    margin-top: 10px;
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

.hidden {
    display: none !important;
}

.link-box {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.link-box input {
    flex: 1;
    background: var(--bg-color);
}

.link-box button {
    padding: 0 15px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
}

.warning {
    font-size: 0.85rem;
    color: var(--text-muted);
    background: #fff3cd;
    padding: 10px;
    border-radius: 6px;
    border: 1px solid #ffeeba;
    margin-top: 10px;
}

footer {
    text-align: center;
    margin-top: 40px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Animations */
.view {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}