:root {
    --primary: #007aff;
    --primary-hover: #0063ce;
    --bg-color: #f5f5f7;
    --text-primary: #1d1d1f;
    --text-secondary: #86868b;
    --panel-bg: rgba(255, 255, 255, 0.7);
    --panel-border: rgba(255, 255, 255, 0.4);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --input-bg: rgba(255, 255, 255, 0.8);
    --input-border: rgba(0, 0, 0, 0.1);
    --radius-l: 24px;
    --radius-m: 16px;
    --radius-s: 12px;
    --blob-1: #a2d2ff;
    --blob-2: #ffc8dd;
    --blob-3: #cdb4db;
}

[data-theme="dark"] {
    --primary: #0a84ff;
    --primary-hover: #409cff;
    --bg-color: #000000;
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --panel-bg: rgba(28, 28, 30, 0.7);
    --panel-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --input-bg: rgba(44, 44, 46, 0.8);
    --input-border: rgba(255, 255, 255, 0.1);


    --blob-1: #1a3d5c;
    --blob-2: #5c2e40;
    --blob-3: #3d2c4d;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;

}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;

    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    transition: background-color 0.3s, color 0.3s;
}

.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);

    opacity: 0.6;
    animation: float 20s infinite ease-in-out;
    transition: background 0.5s;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: var(--blob-1);
}

.blob-2 {
    bottom: -10%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: var(--blob-2);
    animation-delay: -5s;
}

.blob-3 {
    top: 40%;
    left: 40%;
    width: 400px;
    height: 400px;
    background: var(--blob-3);
    animation-delay: -10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0);
    }

    33% {
        transform: translate(30px, -50px);
    }

    66% {
        transform: translate(-20px, 20px);
    }
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    color: var(--text-primary);
    box-shadow: var(--glass-shadow);
    z-index: 10;
    transition: all 0.2s;
}

.theme-toggle:hover {
    transform: scale(1.05);
}

.theme-toggle .material-symbols-rounded {
    font-size: 20px;

    user-select: none;
}

[data-theme="dark"] .sun-icon {
    display: block;
}

[data-theme="dark"] .moon-icon {
    display: none;
}

[data-theme="light"] .sun-icon {
    display: none;
}

[data-theme="light"] .moon-icon {
    display: block;
}

.app-container {
    width: 100%;
    max-width: 960px;
    padding: 40px 20px;
    z-index: 1;
}

.app-header {
    text-align: center;
    margin-bottom: 40px;
}

.app-header h1 {
    font-weight: 700;
    font-size: 3.5rem;
    letter-spacing: -0.03em;
    margin-bottom: 8px;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.app-header p {
    color: var(--text-secondary);
    font-size: 1.2rem;
}

.workspace {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    align-items: start;
}


@media (max-width: 800px) {
    .workspace {
        grid-template-columns: 1fr;
    }
}


.panel {
    background: var(--panel-bg);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-l);
    box-shadow: var(--glass-shadow);
    padding: 30px;
    display: flex;
    flex-direction: column;
    transition: background 0.3s, border 0.3s;
}

.settings-panel {
    gap: 24px;
}


.input-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 10px;
    color: var(--text-secondary);
}

input[type="text"] {
    width: 100%;
    padding: 14px 16px;
    border-radius: var(--radius-s);
    border: 1px solid var(--input-border);
    background: var(--input-bg);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: all 0.2s ease;
    font-family: inherit;
}

input[type="text"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.15);
}


.color-pickers {
    display: flex;
    gap: 12px;
}

.custom-color-control {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: var(--input-bg);
    border-radius: var(--radius-s);
    border: 1px solid var(--input-border);
    cursor: pointer;
    transition: all 0.2s;
    user-select: none;
}

.custom-color-control:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary);
}

.color-swatch-main {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.custom-color-control span {
    font-size: 0.95rem;
    font-weight: 500;
}


.popover-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    z-index: 199;
    display: none;
}

.popover-overlay.visible {
    display: block;
}

.color-picker-popover {
    position: absolute;
    width: 240px;
    background: var(--panel-bg);
    backdrop-filter: blur(30px);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-m);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.2);
    padding: 16px;
    z-index: 200;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px) scale(0.95);
    transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.color-picker-popover.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 12px;
}

.color-grid-item {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.1s;
    border: 1px solid transparent;
}

.color-grid-item:hover {
    transform: scale(1.1);
}


.color-tools-row {
    display: flex;
    gap: 8px;
    align-items: center;
}

.color-input-row {
    flex: 1;
}

.icon-btn {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-s);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
}

.icon-btn:hover {
    background: rgba(125, 125, 125, 0.1);
    border-color: var(--primary);
}

.color-input-row {
    display: flex;
    align-items: center;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-s);
    padding: 0 10px;
}

.color-input-row .hash {
    color: var(--text-secondary);
    margin-right: 4px;
}

.color-input-row input {
    border: none;
    background: transparent;
    padding: 10px 0;
    font-family: monospace;
    font-size: 1rem;
    width: 100%;
}

.color-input-row input:focus {
    box-shadow: none;
}


.warning-message {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    background: rgba(255, 59, 48, 0.1);

    border: 1px solid rgba(255, 59, 48, 0.2);
    border-radius: var(--radius-s);
    color: #ff3b30;
    font-size: 0.9rem;
    font-weight: 500;
    width: 100%;
    max-width: 400px;
}

[data-theme="dark"] .warning-message {
    background: rgba(255, 69, 58, 0.15);
    color: #ff453a;
    border-color: rgba(255, 69, 58, 0.3);
}


.icon-text-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--primary);
    font-weight: 500;
    padding: 4px 8px;
    border-radius: var(--radius-s);
    transition: background 0.2s;
}

.icon-text-btn:hover {
    background: rgba(0, 122, 255, 0.1);
}


.switch-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.switch-label {
    margin-bottom: 0 !important;
    cursor: pointer;
    font-weight: 500 !important;
    text-transform: none !important;
    color: var(--text-primary);

    font-size: 1rem !important;
    letter-spacing: normal !important;
    line-height: 1;

}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
    margin: 0;

}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--input-border);
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 2px;
    bottom: 2px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

input:checked+.slider {
    background-color: var(--primary);
}

input:checked+.slider:before {
    transform: translateX(20px);
}


.file-upload-wrapper {
    position: relative;
    overflow: hidden;
}

.file-upload-wrapper input[type="file"] {
    position: absolute;
    left: 0;
    top: 0;
    opacity: 0;
    width: 100%;
    height: 100%;
    cursor: pointer;
    z-index: 2;
}

.file-upload-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 20px;
    background: var(--input-bg);
    border: 2px dashed var(--input-border);
    border-radius: var(--radius-s);
    color: var(--primary);
    font-weight: 600;
    transition: all 0.2s;
}

.file-upload-wrapper:hover .file-upload-button {
    border-color: var(--primary);
    background: rgba(0, 122, 255, 0.05);
}


.custom-select {
    position: relative;
    width: 100%;
}

.select-trigger {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 16px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-s);
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.2s;
    user-select: none;
}

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

.select-options {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    background: var(--panel-bg);
    backdrop-filter: blur(30px);
    border: 1px solid var(--panel-border);
    border-radius: var(--radius-m);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    overflow: hidden;
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.custom-select.open .select-options {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.option {
    padding: 12px 16px;
    cursor: pointer;
    transition: background 0.1s;
}

.option:hover {
    background: var(--primary);
    color: white;
}


.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}

#padding-value {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary);
}

input[type=range] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    background: transparent;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    margin-top: -8px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: var(--input-border);
    border-radius: 2px;
}


.preview-panel {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 32px;
    min-height: 500px;
}

.preview-card-wrapper {
    width: 100%;

    aspect-ratio: 1;
    max-width: 400px;
    margin: 0 auto;

    background: white;
    border-radius: var(--radius-m);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);


    display: grid;
    place-items: center;
    overflow: hidden;
    position: relative;
    padding: 24px;
}

#qr-code-generated {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}


#qr-code-generated canvas,
#qr-code-generated svg {
    display: block;
    margin: auto;
    object-fit: contain;
}

.actions-wrapper {
    width: 100%;
    max-width: 400px;
    display: flex;
    justify-content: center;
}

.primary-button {
    width: 100%;
    padding: 16px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: var(--radius-m);
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s, background-color 0.2s, box-shadow 0.2s;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

.primary-button:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(0, 122, 255, 0.4);
}

.primary-button:active {
    transform: translateY(1px);
}


.app-footer {
    margin-top: 20px;
    margin-bottom: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.app-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    margin-top: 4px;
    display: inline-block;
}

.app-footer a:hover {
    text-decoration: underline;
}