/* Import Google Fonts for better typography */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

/* CSS Variables for dark mode */
body.dark-mode {
    --primary-blue: #4a9eff;
    --primary-blue-dark: #3d7acc;
    --primary-blue-light: #66b3ff;
    --secondary-blue: #1a2332;
    --accent-blue: #5dadff;
    --text-primary: #ffffff;
    --text-secondary: #b3b3b3;
    --text-light: #808080;
    --bg-primary: #0f1419;
    --bg-secondary: #1a1f2e;
    --bg-gradient: linear-gradient(135deg, #001a33 0%, #003366 100%);
    --border-color: #2d3748;
    --shadow-small: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 8px 25px rgba(0, 0, 0, 0.4);
    --shadow-large: 0 20px 40px rgba(0, 0, 0, 0.5);
    --border-radius: 12px;
    --border-radius-small: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --success-color: #22c55e;
    --error-color: #ef4444;
}

/* CSS Variables for light mode */
body:not(.dark-mode) {
    --primary-blue: #0066ff;
    --primary-blue-dark: #0052cc;
    --primary-blue-light: #3385ff;
    --secondary-blue: #e6f2ff;
    --accent-blue: #0099ff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-light: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #0066ff 0%, #3385ff 100%);
    --border-color: #e0e7ff;
    --shadow-small: 0 2px 8px rgba(102, 126, 234, 0.1);
    --shadow-medium: 0 8px 25px rgba(102, 126, 234, 0.15);
    --shadow-large: 0 20px 40px rgba(102, 126, 234, 0.2);
    --border-radius: 12px;
    --border-radius-small: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --success-color: #22c55e;
    --error-color: #ef4444;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

.container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr 250px;
    gap: 2rem;
}

@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        grid-template-columns: 1fr;
    }
}

section {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
}

h1 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--primary-blue);
}

.input-group {
    margin-bottom: 1.5rem;
}

label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
}

input, textarea, select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: var(--transition);
}

input[type="text"], input[type="password"] {
    padding: 0.75rem 2.5rem 0.75rem 0.75rem; /* Extra right padding for icons */
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

textarea {
    min-height: 150px;
    resize: vertical;
}

select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23ffffff'%3E%3Cpath d='M7 10l5 5 5-5H7z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
}

body:not(.dark-mode) select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%231a1a1a'%3E%3Cpath d='M7 10l5 5 5-5H7z'/%3E%3C/svg%3E");
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.checkbox-group label {
    margin: 0;
    color: var(--text-primary);
}

.sub-input {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.sub-input input[type="number"] {
    width: 80px;
}

.sub-input span {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.password-container, .star-id-container {
    position: relative;
}

.password-container #toggle-password,
.star-id-container #copy-star-id {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    transform: none;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1.2rem;
    padding: 0;
    line-height: 1;
    z-index: 1;
}

.password-container #toggle-password:hover,
.star-id-container #copy-star-id:hover {
    color: var(--primary-blue);
}

button {
    width: 100%;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius-small);
    background: var(--primary-blue);
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

button:active {
    background: var(--primary-blue-light);
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
}

#char-count, #preview-url, #qr-size {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 0.5rem;
}

#success, #error {
    padding: 1rem;
    border-radius: var(--border-radius-small);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

#success {
    background: var(--success-color);
    color: #ffffff;
}

#error {
    background: var(--error-color);
    color: #ffffff;
}

.output-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.tab {
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius-small);
    background: var(--bg-primary);
    cursor: pointer;
    transition: var(--transition);
}

.tab.active {
    background: var(--primary-blue);
    color: #ffffff;
}

#qr-code {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-small);
    margin: 1rem 0;
}

.hidden {
    display: none !important;
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: var(--border-radius);
    max-width: 600px;
    width: 90%;
    box-shadow: var(--shadow-large);
}

.modal-content h2 {
    margin-bottom: 1rem;
    color: var(--primary-blue);
}

.modal-content p {
    margin-bottom: 1rem;
}

#spinner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-primary);
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    color: var(--text-primary);
}

.help-panel {
    position: fixed;
    bottom: 1rem;
    right: 1rem;
    background: var(--bg-secondary);
    padding: 1rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    max-width: 300px;
    transition: var(--transition);
}

@media (max-width: 768px) {
    .container {
        margin: 1rem;
        grid-template-columns: 1fr;
    }

    .sidebar {
        flex-direction: column;
        width: 100%;
        padding: 1rem;
    }

    section {
        padding: 1.5rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    button {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
}