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

:root {
    --ink: #0d0d0d;
    --paper: #f5f0e8;
    --accent: #e63946;
    --muted: #888;
    --border: #0d0d0d;
    --radius: 4px;
}

body {
    background: var(--paper);
    color: var(--ink);
    font-family: 'Syne', sans-serif;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 2rem 1rem;
    background-image:
        radial-gradient(circle at 20% 10%, rgba(230,57,70,0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 90%, rgba(230,57,70,0.06) 0%, transparent 40%),
        repeating-linear-gradient(0deg, transparent, transparent 39px, rgba(0,0,0,0.04) 39px, rgba(0,0,0,0.04) 40px),
        repeating-linear-gradient(90deg, transparent, transparent 39px, rgba(0,0,0,0.04) 39px, rgba(0,0,0,0.04) 40px);
}

.container {
    width: 100%;
    max-width: 900px;
}

header {
    margin-bottom: 3rem;
}

.eyebrow {
    font-family: 'DM Mono', monospace;
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.5rem;
}

h1 {
    font-size: clamp(2.8rem, 7vw, 5rem);
    font-weight: 800;
    line-height: 0.95;
    letter-spacing: -0.03em;
}

h1 span {
    display: block;
    color: var(--accent);
}

.layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    border: 2px solid var(--border);
}

@media (max-width: 640px) {
    .layout { grid-template-columns: 1fr; }
}

.panel {
    background: var(--paper);
    padding: 2rem;
}

.panel-right {
    background: var(--ink);
    color: var(--paper);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 480px;
    gap: 1.5rem;
    position: relative;
    overflow: hidden;
}

.panel-right::before {
    content: '';
    position: absolute;
    inset: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 10px,
        rgba(255,255,255,0.02) 10px,
        rgba(255,255,255,0.02) 11px
    );
}

.field {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.72rem;
    font-family: 'DM Mono', monospace;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
    color: var(--muted);
}

input[type="text"],
input[type="url"],
textarea {
    width: 100%;
    border: 2px solid var(--border);
    background: transparent;
    padding: 0.75rem 1rem;
    font-family: 'DM Mono', monospace;
    font-size: 0.9rem;
    color: var(--ink);
    outline: none;
    transition: border-color 0.15s;
    resize: vertical;
}

input[type="text"]:focus,
input[type="url"]:focus,
textarea:focus {
    border-color: var(--accent);
}

.upload-area {
    border: 2px dashed var(--border);
    padding: 1.5rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
}

.upload-area:hover {
    border-color: var(--accent);
    background: rgba(230,57,70,0.04);
}

.upload-area input[type="file"] {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
}

.upload-label {
    font-size: 0.8rem;
    font-family: 'DM Mono', monospace;
    color: var(--muted);
}

.upload-label strong {
    color: var(--accent);
    font-weight: 500;
}

#logo-preview {
    width: 48px;
    height: 48px;
    object-fit: contain;
    display: none;
    margin: 0.5rem auto 0;
    border: 1px solid var(--border);
}

.color-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.color-field {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border: 2px solid var(--border);
    padding: 0.5rem 0.75rem;
}

input[type="color"] {
    width: 28px;
    height: 28px;
    border: none;
    background: none;
    cursor: pointer;
    padding: 0;
}

.color-hex {
    font-family: 'DM Mono', monospace;
    font-size: 0.82rem;
}

.size-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
}

.size-btn {
    background: transparent;
    border: 2px solid var(--border);
    padding: 0.6rem;
    font-family: 'DM Mono', monospace;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.1s;
}

.size-btn:hover { background: rgba(0,0,0,0.06); }
.size-btn.active { background: var(--ink); color: var(--paper); }

.btn-generate {
    width: 100%;
    background: var(--accent);
    color: white;
    border: 2px solid var(--accent);
    padding: 1rem;
    font-family: 'Syne', sans-serif;
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.15s;
    margin-top: 0.5rem;
}

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

.btn-generate:active { transform: scale(0.99); }

/* QR Output */
.qr-wrapper {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

#qr-canvas-container {
    position: relative;
    display: inline-block;
    background: white;
    padding: 16px;
}

#qr-canvas-container canvas,
#qr-canvas-container img {
    display: block;
}

#qr-logo-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: white;
    padding: 4px;
    display: none;
}

#qr-logo-overlay img {
    display: block;
    object-fit: contain;
}

.qr-caption {
    font-size: 0.85rem;
    font-family: 'DM Mono', monospace;
    color: rgba(245,240,232,0.7);
    text-align: center;
    max-width: 220px;
    word-break: break-word;
}

.empty-state {
    text-align: center;
    z-index: 1;
}

.empty-state .icon {
    font-size: 3rem;
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 1rem;
}

.empty-state p {
    font-family: 'DM Mono', monospace;
    font-size: 0.75rem;
    opacity: 0.4;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.download-row {
    display: flex;
    gap: 2px;
    z-index: 1;
}

.btn-dl {
    background: rgba(245,240,232,0.1);
    color: var(--paper);
    border: 1px solid rgba(245,240,232,0.2);
    padding: 0.55rem 1rem;
    font-family: 'DM Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    cursor: pointer;
    transition: all 0.15s;
    text-transform: uppercase;
}

.btn-dl:hover { background: rgba(245,240,232,0.2); }

.section-title {
    font-size: 0.65rem;
    font-family: 'DM Mono', monospace;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(0,0,0,0.1);
}