/* SpyCode - Retro Spy/Film Noir Styling */

@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@400;600;700&family=Space+Mono:wght@400;700&family=Crimson+Text:ital,wght@0,400;0,600;1,400&display=swap');

:root {
    /* Vintage color palette */
    --color-bg-primary: #1a1612;
    --color-bg-secondary: #2a241f;
    --color-bg-card: #2d2720;
    --color-bg-paper: #3a3228;
    
    --color-text-primary: #f5e6d3;
    --color-text-secondary: #d4c4b0;
    --color-text-muted: #9d8e7a;
    
    --color-accent-amber: #d4a574;
    --color-accent-gold: #c9a961;
    --color-accent-cream: #f5e6d3;
    --color-accent-brown: #8b6f47;
    
    --color-border: rgba(212, 165, 116, 0.3);
    --color-border-light: rgba(212, 165, 116, 0.15);
    --color-border-dark: rgba(212, 165, 116, 0.5);
    
    --color-success: #8b9a5b;
    --color-error: #a85d5d;
    
    --shadow-vintage: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(212, 165, 116, 0.1);
    --shadow-inset: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Crimson Text', serif;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Film grain overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(
            0deg,
            rgba(0, 0, 0, 0.15),
            rgba(0, 0, 0, 0.15) 1px,
            transparent 1px,
            transparent 2px
        ),
        repeating-linear-gradient(
            90deg,
            rgba(0, 0, 0, 0.15),
            rgba(0, 0, 0, 0.15) 1px,
            transparent 1px,
            transparent 2px
        );
    pointer-events: none;
    z-index: 1000;
    opacity: 0.3;
    animation: grain 0.5s steps(6) infinite;
}

@keyframes grain {
    0%, 100% { transform: translate(0, 0); }
    10% { transform: translate(-5%, -10%); }
    20% { transform: translate(-15%, 5%); }
    30% { transform: translate(7%, -25%); }
    40% { transform: translate(-5%, 25%); }
    50% { transform: translate(-15%, 10%); }
    60% { transform: translate(15%, 0%); }
    70% { transform: translate(0%, 15%); }
    80% { transform: translate(3%, 35%); }
    90% { transform: translate(-10%, 10%); }
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 0;
    border-bottom: 2px solid var(--color-border);
    position: relative;
}

.header::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent-amber), transparent);
}

.logo h1 {
    font-family: 'Cinzel', serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--color-accent-gold);
    text-shadow: 
        0 0 10px rgba(212, 165, 116, 0.5),
        2px 2px 4px rgba(0, 0, 0, 0.8),
        0 0 30px rgba(201, 169, 97, 0.3);
    letter-spacing: 0.2em;
    margin-bottom: 0.5rem;
    animation: fadeInDown 1s ease-out;
}

.tagline {
    font-family: 'Crimson Text', serif;
    font-size: 1.1rem;
    font-style: italic;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
    animation: fadeInUp 1s ease-out 0.2s both;
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Controls Section */
.controls-section {
    background: var(--color-bg-card);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-vintage);
    position: relative;
}

.controls-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent-amber), transparent);
}

.controls-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-group {
    margin-bottom: 0;
    position: relative;
}

@media (min-width: 768px) {
    .controls-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
        align-items: start;
    }
    
    .control-group {
        margin-bottom: 0;
    }
    
    /* Key group spans full width on larger screens if needed */
    #keyGroup {
        grid-column: 2;
    }
}

.control-group label {
    display: block;
    font-family: 'Cinzel', serif;
    font-size: 0.9rem;
    color: var(--color-accent-amber);
    margin-bottom: 0.5rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    word-break: break-word;
}

.control-group .label-with-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-info {
    padding: 0;
    background: transparent;
    border: none;
    color: var(--color-accent-amber);
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 0.25rem;
}

.btn-info:hover {
    color: var(--color-accent-gold);
    transform: scale(1.1);
}

.vintage-select,
.vintage-input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-bg-paper);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-primary);
    font-family: 'Space Mono', monospace;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.vintage-select:focus,
.vintage-input:focus {
    outline: none;
    border-color: var(--color-accent-amber);
    box-shadow: 0 0 10px rgba(212, 165, 116, 0.3);
    background: var(--color-bg-secondary);
}

.vintage-select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23d4a574' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.vintage-select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.key-input-container {
    position: relative;
    width: 100%;
}

.key-input-container .vintage-input {
    width: 100%;
    padding-right: 3rem;
}

.btn-copy-inline {
    position: absolute;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    padding: 0.5rem;
    background: transparent;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 4px;
}

.btn-copy-inline:hover {
    background: rgba(212, 165, 116, 0.1);
    color: var(--color-accent-amber);
}

.btn-copy-inline.copied {
    color: var(--color-success);
}

.btn-copy-inline .btn-icon {
    font-size: 1rem;
}

.algorithm-description {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-style: italic;
    line-height: 1.4;
}

.key-hint {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.message-usage-note {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-style: italic;
    line-height: 1.4;
}

/* SVG Icons */
.icon-info,
.icon-copy,
.icon-check,
.icon-trash {
    display: inline-block;
    vertical-align: middle;
    stroke: currentColor;
    fill: none;
}

/* Security Tip Tooltip */
.security-tip-tooltip {
    position: absolute;
    z-index: 2000;
    animation: fadeInDown 0.3s ease-out;
}

.tooltip-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-shadow: var(--shadow-vintage);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 100%;
}

.tooltip-content p {
    margin: 0;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    line-height: 1.5;
}

.tooltip-content strong {
    color: var(--color-accent-amber);
}

.tooltip-arrow {
    position: absolute;
    bottom: -8px;
    left: 20px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid var(--color-bg-card);
}

.tooltip-arrow::before {
    content: '';
    position: absolute;
    bottom: 1px;
    left: -8px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-top: 8px solid var(--color-border);
}

.btn-got-it {
    align-self: flex-end;
    padding: 0.4rem 1rem;
    background: var(--color-accent-amber);
    border: 1px solid var(--color-accent-amber);
    border-radius: 4px;
    color: var(--color-bg-primary);
    font-family: 'Cinzel', serif;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.btn-got-it:hover {
    background: var(--color-accent-gold);
    border-color: var(--color-accent-gold);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(212, 165, 116, 0.3);
}

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

/* Mode Toggle */
.mode-group {
    margin-top: 1.5rem;
}

.mode-toggle {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.mode-btn {
    flex: 1;
    min-width: 120px;
    padding: 0.75rem 1.5rem;
    background: var(--color-bg-paper);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-secondary);
    font-family: 'Cinzel', serif;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
}

.mode-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(212, 165, 116, 0.2), transparent);
    transition: left 0.5s ease;
}

.mode-btn:hover::before {
    left: 100%;
}

.mode-btn:hover {
    border-color: var(--color-accent-amber);
    color: var(--color-accent-amber);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

.mode-btn.active {
    background: var(--color-accent-amber);
    color: var(--color-bg-primary);
    border-color: var(--color-accent-amber);
    box-shadow: 0 0 15px rgba(212, 165, 116, 0.5);
    font-weight: 600;
}

/* Input/Output Sections */
.input-section,
.output-section {
    background: var(--color-bg-card);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-vintage);
    position: relative;
}

.input-section label,
.output-section label {
    display: block;
    font-family: 'Cinzel', serif;
    font-size: 0.9rem;
    color: var(--color-accent-amber);
    margin-bottom: 0.75rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    word-break: break-word;
}

.vintage-textarea {
    width: 100%;
    padding: 1rem;
    background: var(--color-bg-paper);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-primary);
    font-family: 'Space Mono', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 120px;
    transition: all 0.3s ease;
}

.vintage-textarea:focus {
    outline: none;
    border-color: var(--color-accent-amber);
    box-shadow: 0 0 10px rgba(212, 165, 116, 0.3);
    background: var(--color-bg-secondary);
}

.output-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    gap: 1rem;
}

.output-display {
    min-height: 120px;
    padding: 1rem;
    background: var(--color-bg-paper);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: 'Space Mono', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    word-break: break-all;
    white-space: pre-line;
    position: relative;
}

.output-placeholder {
    color: var(--color-text-muted);
    font-style: italic;
}

.output-text {
    color: var(--color-text-primary);
    animation: fadeIn 0.5s ease-out;
}

.output-success {
    color: var(--color-success);
    font-weight: 600;
    display: block;
    margin-bottom: 0.5rem;
}

.output-error {
    color: var(--color-error);
    font-weight: 600;
}

/* Buttons */
.action-section {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-primary,
.btn-secondary,
.btn-copy {
    flex: 1;
    min-width: 100px;
    padding: 1rem 2rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: 'Cinzel', serif;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--color-accent-amber);
    color: var(--color-bg-primary);
    border-color: var(--color-accent-amber);
    font-weight: 600;
}

.btn-primary:hover {
    background: var(--color-accent-gold);
    box-shadow: 0 0 20px rgba(212, 165, 116, 0.6);
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--color-bg-paper);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-accent-amber);
    color: var(--color-accent-amber);
    transform: translateY(-2px);
}

.btn-copy {
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    background: var(--color-bg-paper);
    color: var(--color-text-primary);
    max-width: 300px;
}

.btn-copy:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-accent-amber);
    color: var(--color-accent-amber);
}

.btn-copy.copied {
    background: var(--color-success);
    border-color: var(--color-success);
    color: var(--color-bg-primary);
}

/* SVG icons are handled by .icon-* classes */

/* Info Section */
.info-section {
    margin-top: 1rem;
}

.info-card {
    background: var(--color-bg-card);
    padding: 1.5rem;
    border-radius: 8px;
    border: 1px solid var(--color-border-light);
    border-left: 3px solid var(--color-accent-amber);
}

.info-card h3 {
    font-family: 'Cinzel', serif;
    color: var(--color-accent-amber);
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.info-card p {
    margin-bottom: 0.5rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

.info-card code {
    background: var(--color-bg-paper);
    padding: 0.2rem 0.5rem;
    border-radius: 3px;
    font-family: 'Space Mono', monospace;
    font-size: 0.9em;
    color: var(--color-accent-amber);
    border: 1px solid var(--color-border);
    word-break: break-word;
}

/* Footer */
#footer {
    text-align: center;
    margin-top: 3rem;
    padding: 2rem 1rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-style: italic;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    margin: 0.25rem 0;
}

.footer-subtitle {
    font-size: 0.85rem;
    opacity: 0.8;
    font-style: italic;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: var(--color-text-muted);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: var(--color-text-primary, #333);
    text-decoration: underline;
}

.footer-separator {
    opacity: 0.5;
}

.footer-copyright {
    margin-top: 1rem;
    font-size: 0.85rem;
    opacity: 0.7;
}

@media (max-width: 768px) {
    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .footer-separator {
        display: none;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Theme Switcher */
.theme-switcher {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 2000;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    padding: 0.5rem;
    display: flex;
    gap: 0.5rem;
    box-shadow: var(--shadow-vintage);
    border-radius: 8px;
}

.theme-btn {
    padding: 0.5rem 1rem;
    background: var(--color-bg-paper);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-secondary);
    font-family: 'Cinzel', serif;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.theme-btn:hover {
    border-color: var(--color-accent-amber);
    color: var(--color-accent-amber);
    box-shadow: 0 0 10px rgba(212, 165, 116, 0.3);
}

.theme-btn.active {
    background: var(--color-accent-amber);
    border-color: var(--color-accent-amber);
    color: var(--color-bg-primary);
    box-shadow: 0 0 15px rgba(212, 165, 116, 0.5);
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }
    
    .logo h1 {
        font-size: 2.5rem;
    }
    
    .controls-section,
    .input-section,
    .output-section {
        padding: 1.5rem;
    }
    
    .mode-toggle {
        flex-direction: column;
    }
    
    .mode-btn {
        width: 100%;
    }
    
    .action-section {
        flex-direction: column;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
    }
    
    .theme-switcher {
        position: relative;
        top: auto;
        right: auto;
        margin: 1rem;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 2rem;
    }
    
    .tagline {
        font-size: 0.95rem;
    }
}

/* Typewriter effect for output (optional enhancement) */
@keyframes typewriter {
    from {
        width: 0;
    }
    to {
        width: 100%;
    }
}

.typewriter {
    overflow: hidden;
    white-space: nowrap;
    animation: typewriter 2s steps(40) 1s both;
}