:root {
    /* Palette - Deep Forest & Glass */
    --primary: #041C1E;
    --primary-rgb: 4, 28, 30;
    --secondary: #134338;
    --secondary-rgb: 19, 67, 56;
    --accent: #738C65;
    --accent-rgb: 115, 140, 101;
    --warn: #C9A253;
    --danger: #B75D5D;

    /* Surface & Glass */
    --bg-gradient: radial-gradient(circle at 50% 0%, #1a3c36 0%, #041C1E 100%);
    --glass-surface: rgba(255, 255, 255, 0.03);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-highlight: rgba(255, 255, 255, 0.12);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);

    /* Text */
    --text-main: #FEFCF8;
    --text-muted: rgba(254, 252, 248, 0.6);

    /* Spacing & Radius */
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --gap-lg: 32px;
    --gap-md: 20px;

    /* Transitions */
    --ease-out: cubic-bezier(0.215, 0.61, 0.355, 1);
}

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

body {
    font-family: "Funnel Display", system-ui, -apple-system, sans-serif;
    background: var(--primary);
    background-image: var(--bg-gradient);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Background Mesh Effect */
.bg-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.4;
    background-image:
        radial-gradient(at 80% 0%, hsla(148, 37%, 28%, 1) 0px, transparent 50%),
        radial-gradient(at 0% 50%, hsla(155, 26%, 15%, 1) 0px, transparent 50%),
        radial-gradient(at 80% 50%, hsla(148, 37%, 28%, 1) 0px, transparent 50%),
        radial-gradient(at 0% 100%, hsla(155, 26%, 15%, 1) 0px, transparent 50%);
    filter: blur(60px);
    pointer-events: none;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
    width: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0 40px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: var(--accent);
    border-radius: 8px;
    display: grid;
    place-items: center;
    color: var(--primary);
}

/* Main Layout */

/* Main Layout */
.app-grid {
    display: grid;
    grid-template-columns: 1fr 400px;
    gap: var(--gap-lg);
    flex: 1;
}

/* Glass Panels */
.glass-panel {
    background: rgba(4, 28, 30, 0.4);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--glass-shadow);
}

/* Left Panel - Editor */
.editor-panel {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.section-header::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--glass-border);
}

/* Templates Grid */
.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 12px;
}

.template-card {
    background: var(--glass-surface);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 16px 10px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s var(--ease-out);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.template-card:hover {
    background: var(--glass-highlight);
    transform: translateY(-2px);
}

.template-card.active {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--primary);
    box-shadow: 0 4px 12px rgba(115, 140, 101, 0.3);
}

.template-icon {
    font-size: 1.5rem;
}

.template-name {
    font-size: 0.85rem;
    font-weight: 600;
}

/* Input Areas */
.input-wrapper {
    position: relative;
    margin-bottom: 20px;
}

.validation-icon {
    position: absolute;
    right: 16px;
    bottom: 16px;
    color: #4CAF50;
    opacity: 0;
    transform: scale(0.5);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: none;
}

.input-wrapper.valid .validation-icon {
    opacity: 1;
    transform: scale(1);
}

.input-wrapper.valid textarea,
.input-wrapper.valid input {
    border-color: #4CAF50;
    box-shadow: 0 0 0 1px rgba(76, 175, 80, 0.2);
}

input,
textarea,
select {
    width: 100%;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    padding: 16px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.2s;
}

textarea {
    min-height: 120px;
    resize: vertical;
    line-height: 1.5;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(0, 0, 0, 0.3);
    box-shadow: 0 0 0 2px rgba(115, 140, 101, 0.2);
}

label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Builder Forms */
.builder-container {
    margin-bottom: 20px;
    animation: slideDown 0.3s var(--ease-out);
}

.builder-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.input-group {
    display: flex;
    flex-direction: column;
}

.input-group.full-width {
    grid-column: 1 / -1;
}

.builder-grid input,
.builder-grid select {
    padding: 12px;
    font-size: 0.95rem;
}

/* Smart Suggestions */
.smart-banner {
    background: linear-gradient(90deg, rgba(115, 140, 101, 0.15) 0%, rgba(115, 140, 101, 0.05) 100%);
    border: 1px solid rgba(115, 140, 101, 0.3);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    animation: slideDown 0.3s var(--ease-out);
}

.smart-content {
    display: flex;
    align-items: center;
    gap: 12px;
}

.smart-btn {
    background: var(--accent);
    color: var(--primary);
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.1s;
}

.smart-btn:hover {
    transform: scale(1.05);
}

/* Right Panel - Preview */
.preview-panel {
    position: sticky;
    top: 20px;
    height: fit-content;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.qr-preview canvas {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-sm);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.qr-preview.clickable {
    cursor: pointer;
}

.qr-preview.clickable:hover canvas {
    transform: scale(1.02);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.qr-stage {
    background: #FFFFFF;
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    margin-bottom: 24px;
    transition: transform 0.3s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.qr-stage:hover {
    transform: translateY(-4px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}



.qr-placeholder {
    width: 250px;
    height: 250px;
    display: grid;
    place-items: center;
    color: rgba(0, 0, 0, 0.3);
    border: 2px dashed rgba(0, 0, 0, 0.1);
    border-radius: 12px;
}

/* Actions */
.action-group {
    display: flex;
    gap: 12px;
    width: 100%;
}

.btn {
    flex: 1;
    height: 48px;
    padding: 0 14px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    /* Base border for all buttons */
    font-weight: 600;
    font-size: 1rem;
    line-height: 1;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: var(--accent);
    color: var(--primary);
    /* Border is transparent from base class */
}

.btn-primary:hover {
    background: #849e74;
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--glass-surface);
    border-color: var(--glass-border);
    /* Override transparent border */
    color: var(--text-main);
}

.btn-secondary:hover {
    background: var(--glass-highlight);
    transform: translateY(-1px);
}

.btn-share {
    background: rgba(229, 210, 181, 0.15);
    /* Sand tint #E5D2B5 */
    border-color: rgba(229, 210, 181, 0.3);
    /* Override transparent border */
    color: #E5D2B5;
    box-shadow: none;
    /* Remove box-shadow border */
}

.btn-share:hover {
    background: rgba(229, 210, 181, 0.25);
    border-color: rgba(229, 210, 181, 0.5);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(229, 210, 181, 0.15);
}

.btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
    flex-shrink: 0;
    /* Global transform removed to protect Download buttons */
}

/* Specific Alignment Fixes for Share Button */
#share-btn svg {
    transform: translateY(1px);
    /* Push icon down to center (was high) */
}

#share-btn span {
    position: relative;
    top: -2px;
    /* Pull text up to center (was low) */
}

/* Ensure buttons have consistent height */
.action-group .btn {
    height: 48px;
    /* Enforce explicit height */
    min-height: 0;
    /* Reset min-height */
}

/* Custom Tooltip */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    background: rgba(4, 28, 30, 0.9);
    border: 1px solid var(--glass-border);
    color: var(--text-main);
    padding: 6px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    z-index: 10;
    backdrop-filter: blur(4px);
}

[data-tooltip]:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
}

.btn-secondary:hover {
    background: var(--glass-highlight);
}

/* Settings Grid */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 24px;
    width: 100%;
}

.settings-grid>div {
    min-width: 0;
    /* Prevent grid blowout */
}

/* Color Picker & Hex Input */
.color-input-group {
    display: flex;
    gap: 8px;
}

.color-picker-wrapper {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.2);
    padding: 4px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--glass-border);
    transition: all 0.2s;
}

.color-picker-wrapper:hover {
    background: rgba(0, 0, 0, 0.3);
    border-color: var(--accent);
}

input[type="color"] {
    width: 100%;
    height: 32px;
    padding: 0;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: none;
}

.color-input-group input[type="text"] {
    flex: 1;
    font-family: monospace;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    text-align: center;
}

/* Footer */
.app-footer {
    margin-top: auto;
    padding: 3rem 0 2rem;
    /* More top padding for separation */
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.privacy-badge {
    background: var(--glass-surface);
    border: 1px solid var(--glass-border);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    /* Rounded rectangle, not pill */
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: inline-flex;
    align-items: center;
    gap: 10px;
    max-width: 90%;
    width: auto;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}

.privacy-badge:hover {
    transform: translateY(-2px);
    border-color: var(--accent);
}

.privacy-badge svg {
    color: var(--accent);
    flex-shrink: 0;
}

.privacy-badge span {
    color: var(--text-main);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: left;
    line-height: 1.4;
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin: 0;
    opacity: 0.6;
    font-weight: 500;
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
    border-bottom: 1px solid transparent;
}

.footer-link:hover {
    color: var(--accent);
    border-bottom-color: var(--accent);
    opacity: 1;
}

.app-footer a {
    color: var(--accent);
    text-decoration: none;
}

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

/* Animations */
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Mobile Responsive */
@media (max-width: 900px) {
    .app-grid {
        grid-template-columns: 1fr;
    }

    .preview-panel {
        position: relative;
        top: 0;
        order: -1;
        /* Preview on top on mobile */
    }

    .qr-stage {
        margin: 0 auto 24px;
    }

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