:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --secondary: #ec4899;
    --accent: #14b8a6;
    --success: #10b981;
    --danger: #ef4444;
    --bg-primary: #f5f1e8;
    --bg-secondary: #ede8db;
    --bg-card: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border: #d4c5b0;
    --shadow: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'DM Sans', sans-serif;
    background: linear-gradient(135deg, #f5f1e8 0%, #ede8db 50%, #f5f1e8 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem;
    position: relative;
    overflow-x: hidden;
}

/* Animated background effect */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.06) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(236, 72, 153, 0.06) 0%, transparent 50%),
                radial-gradient(circle at 40% 80%, rgba(20, 184, 166, 0.06) 0%, transparent 50%);
    animation: drift 20s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes drift {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(5%, -5%) rotate(1deg); }
    66% { transform: translate(-5%, 5%) rotate(-1deg); }
}

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

h1 {
    font-family: 'Fredoka', sans-serif;
    font-size: 3.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    animation: fadeInDown 0.6s ease-out;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

@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);
    }
}

.card {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08), 0 0 0 1px var(--border);
    animation: fadeInUp 0.6s ease-out both;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:nth-child(2) { animation-delay: 0.1s; }
.card:nth-child(3) { animation-delay: 0.2s; }
.card:nth-child(4) { animation-delay: 0.3s; }

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12), 0 0 0 1px var(--border);
}

.card h3 {
    font-family: 'Fredoka', sans-serif;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card h3::before {
    content: '';
    width: 4px;
    height: 24px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
    border-radius: 2px;
}

/* Connection Controls */
.connection-controls {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: nowrap;
}

button {
    font-family: 'DM Sans', sans-serif;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    border: none;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.2s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    transition: width 0.4s ease, height 0.4s ease;
}

button:hover::before {
    width: 300px;
    height: 300px;
}

button:active {
    transform: scale(0.98);
}

#ble, #channel_connect {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

#ble:hover, #channel_connect:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

#test, #send {
    background: linear-gradient(135deg, var(--accent), #0d9488);
    color: white;
}

#test:hover, #send:hover {
    box-shadow: 0 4px 12px rgba(20, 184, 166, 0.4);
}

/* Status Indicators */
.status-indicator {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    display: inline-block;
    position: relative;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
    transition: all 0.3s ease;
}

.status-indicator.inactive {
    background-color: var(--danger);
    animation: pulse-red 2s ease-in-out infinite;
}

.status-indicator.active {
    background-color: var(--success);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3);
    animation: pulse-green 2s ease-in-out infinite;
}

@keyframes pulse-red {
    0%, 100% {
        box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(239, 68, 68, 0.1);
    }
}

@keyframes pulse-green {
    0%, 100% {
        box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.3);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(16, 185, 129, 0.15);
    }
}

/* Channel Setup Table */
table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

td {
    padding: 0.75rem 0.5rem;
    vertical-align: middle;
}

input[type="text"] {
    font-family: 'DM Sans', monospace;
    padding: 0.625rem 1rem;
    border-radius: 10px;
    border: 2px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.2s ease;
    width: 100%;
}

input[type="number"] {
    font-family: 'DM Sans', monospace;
    padding: 0.625rem 1rem;
    border-radius: 10px;
    border: 2px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

input[type="text"]:focus,
input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

#topic {
    color: var(--primary) !important;
    font-weight: 600;
}

#channelValue {
    display: inline-block;
    padding: 0.625rem 1rem;
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid var(--border);
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    font-family: 'DM Sans', monospace;
    min-width: 60px;
    text-align: center;
}

#activity {
    margin-top: 1.5rem;
    padding: 1rem;
    background: var(--bg-card);
    border-radius: 12px;
    border: 2px solid var(--border);
    color: var(--primary);
    font-family: 'DM Sans', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    max-height: 200px;
    overflow-y: auto;
}

/* Intelligence Section */
.intelligence-flow {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.flow-row {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.flow-label {
    font-weight: 600;
    color: var(--secondary);
    font-family: 'Fredoka', sans-serif;
    font-size: 1.1rem;
    min-width: 60px;
}

select {
    font-family: 'DM Sans', sans-serif;
    padding: 0.75rem 1rem;
    border-radius: 10px;
    border: 2px solid var(--border);
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    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='%2364748b' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

select:hover {
    border-color: var(--primary);
}

select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

#action {
    display: flex;
    flex-direction: row;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: 12px;
    border: 2px dashed var(--border);
    margin-top: 1rem;
}

.action-row {
    display: flex;
    align-items: center;
    gap: 1rem;
}

#midi-note-container {
    transition: opacity 0.3s ease;
}

#midi-note {
    animation: fadeIn 0.3s ease-out;
}

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

.connector {
    color: var(--text-secondary);
    font-weight: 600;
    font-family: 'Fredoka', sans-serif;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .connection-controls {
        gap: 0.75rem;
    }
    
    .connection-controls button {
        padding: 0.625rem 1rem;
        font-size: 0.85rem;
    }
    
    table {
        font-size: 0.85rem;
    }
    
    td {
        padding: 0.5rem 0.25rem;
    }
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* Designer credit */
.designer-credit {
    margin-top: 3rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.designer-credit:hover {
    opacity: 1;
}