:root {
    --primary: #2D3E84;
    --primary-dark: #1a2555;
    --primary-light: #4a5fa0;
    --secondary: #ec4899;
    --success: #10b981;
    --surface: #f8fafc;
    --surface-alt: #ffffff;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-muted: #64748b;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #2D3E84 0%, #1a2555 100%);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #2D3E84 0%, #1a2555 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

.app-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 2rem clamp(1rem, 3vw, 2rem);
}

.header {
    text-align: center;
    margin-bottom: 2rem;
    color: white;
    animation: fadeInDown 0.6s ease;
}

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

.header h1 {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    letter-spacing: -0.5px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
}

.header h1::after {
    content: 'made by Prof. Emanuel';
    font-size: 0.35em;
    font-weight: 300;
    opacity: 0.6;
    font-style: italic;
    letter-spacing: 0.5px;
    transform: skewX(-8deg);
    display: block;
    cursor: pointer;
    transition: opacity 0.2s ease;
}

.header h1::after:hover {
    opacity: 0.9;
}

.header p {
    font-size: clamp(0.95rem, 2vw, 1.1rem);
    opacity: 0.95;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}
.main-layout {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.sidebar {
    position: sticky;
    top: 2rem;
    height: fit-content;
    z-index: 100;
}

.control-panel {
    background: var(--surface-alt);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
}

@media (max-width: 1024px) {
    .sidebar {
        position: relative;
        top: 0;
    }
}

.control-panel h2 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text);
    display: none;
}

.control-panel h2::after {
    content: '';
    flex: 1;
    height: 2px;
    background: linear-gradient(to right, var(--primary-light), transparent);
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 0.5rem;
}

.select-input,
.number-input {
    width: 100%;
    padding: 0.7rem 0.9rem;
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    background: var(--surface);
    color: var(--text);
    transition: all 0.2s ease;
    font-family: inherit;
}

.select-input:hover,
.number-input:hover {
    border-color: var(--primary-light);
}

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

.params-container {
    display: grid;
    gap: 1rem;
    margin-top: 1rem;
}

.param-group {
    display: grid;
    gap: 0.4rem;
}

.param-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
}

.generate-button,
.add-segment-button {
    width: 100%;
    padding: 1rem;
    margin-top: 1.5rem;
    background: var(--gradient-2);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(45, 62, 132, 0.4);
    transition: all 0.3s ease;
}

.add-segment-button {
    background: linear-gradient(135deg, var(--success), #059669);
    box-shadow: 0 4px 14px rgba(16, 185, 129, 0.4);
    padding: 0.75rem;
    font-size: 0.9rem;
}

.add-segment-button:hover {
    box-shadow: 0 6px 20px rgba(16, 185, 129, 0.5);
}

.graphs-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.graph-card {
    background: var(--surface-alt);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
}

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

.graph-title {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
    margin: 0;
}

.download-btn {
    background: var(--gradient-2);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(45, 62, 132, 0.3);
}

.canvas-container {
    position: relative;
    width: 100%;
    min-height: 400px;
    height: 500px;
}

canvas {
    width: 100% !important;
    height: 100% !important;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
}

.footer {
    text-align: center;
    color: white;
    padding: 1.5rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

@media (max-width: 768px) {
    .app-container {
        padding: 1rem;
    }

    .control-panel {
        padding: 1.25rem;
    }

    .graphs-grid {
        grid-template-columns: 1fr;
    }

    .graph-card {
        padding: 1.25rem;
    }

    .graph-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .download-btn {
        width: 100%;
    }

    .header h1 {
        font-size: 1.8rem;
    }
}

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

.graph-card {
    animation: fadeIn 0.4s ease;
}

.graph-card:nth-child(1) { animation-delay: 0.1s; }
.graph-card:nth-child(2) { animation-delay: 0.2s; }
.graph-card:nth-child(3) { animation-delay: 0.3s; }

#combined-motion-params {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 2px solid var(--border);
}

#combined-motion-params h4 {
    font-size: 1rem;
    color: var(--text);
    margin-bottom: 1rem;
    font-weight: 600;
}

#segments-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

#segments-container::-webkit-scrollbar {
    width: 6px;
}

#segments-container::-webkit-scrollbar-track {
    background: var(--surface);
    border-radius: 10px;
}

#segments-container::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 10px;
}

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

.segment {
    background: var(--surface);
    padding: 1rem;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border);
    transition: all 0.2s ease;
}

.segment:hover {
    border-color: var(--primary-light);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
}

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

.segment-header h5 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
    margin: 0;
}

.remove-segment-btn {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
    border: none;
    padding: 0.4rem 0.8rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 6px rgba(239, 68, 68, 0.3);
}

.remove-segment-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 3px 10px rgba(239, 68, 68, 0.4);
}

.remove-segment-btn:active {
    transform: scale(0.95);
}


@keyframes bounce {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -45%) scale(1.1);
    }
    100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 1;
    }
}

body.rainbow-mode {
    background: linear-gradient(135deg, #2D3E84 0%, #1a2555 100%);
}

.prof-easter-egg {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 10000;
    pointer-events: none;
    text-align: center;
}

.prof-easter-egg .message {
    font-size: 3rem;
    font-weight: bold;
    color: #FFD700;
    text-shadow: 0 0 30px rgba(255, 215, 0, 0.8), 0 0 60px rgba(255, 215, 0, 0.5);
    margin-bottom: 1rem;
}

.prof-easter-egg img {
    width: 400px;
    height: auto;
    border-radius: 20px;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.5);
}

body.niceme-mode::before {
    content: 'Siixxx';
    position: fixed;
    top: 50%;
    left: 45%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
    font-weight: bold;
    opacity: 0.9;
    z-index: 9999;
    animation: moveUp 2s ease-in-out infinite;
    pointer-events: none;
    color: #FF006E;
    text-shadow: 0 0 20px rgba(255, 0, 110, 0.6), 0 0 40px rgba(255, 0, 110, 0.3);
}

body.niceme-mode::after {
    content: 'Seveeeen';
    position: fixed;
    top: 50%;
    left: 55%;
    transform: translate(-50%, -50%);
    font-size: 4rem;
    font-weight: bold;
    opacity: 0.9;
    z-index: 9999;
    animation: moveDown 2s ease-in-out infinite;
    pointer-events: none;
    color: #FF006E;
    text-shadow: 0 0 20px rgba(255, 0, 110, 0.6), 0 0 40px rgba(255, 0, 110, 0.3);
}

@keyframes moveUp {
    0% {
        transform: translate(-50%, -50%);
    }
    50% {
        transform: translate(-50%, -150%);
    }
    100% {
        transform: translate(-50%, 50%);
    }
}

@keyframes moveDown {
    0% {
        transform: translate(-50%, -50%);
    }
    50% {
        transform: translate(-50%, 50%);
    }
    100% {
        transform: translate(-50%, -150%);
    }
}

@keyframes niceme-spin {
    0% {
        transform: translate(-50%, -50%) scale(0) rotate(0deg);
        opacity: 0;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.2) rotate(-10deg);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(1) rotate(0deg);
        opacity: 0.6;
    }
}

body.niceme-mode {
    position: relative;
}

.six-seven-gif {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 9997;
    pointer-events: none;
    opacity: 0.4;
}

.six-seven-gif img {
    width: 500px;
    height: auto;
    display: block;
}