/* ============================================
   QR CODE MAKER - PodaLink Tool
   ============================================ */

/* --- Tool Hero --- */
.tool-hero {
    padding: 8rem 0 3rem;
    text-align: center;
}

.tool-hero h1 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-top: 0.75rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.tool-hero-lead {
    font-size: 1.05rem;
    line-height: 1.7;
    max-width: 640px;
    margin: 1.25rem auto 0;
    color: var(--color-text);
}

.tool-hero-sub {
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 600px;
    margin: 0.75rem auto 0;
    color: var(--color-text);
}

/* --- QR Generator Section --- */
.qr-generator {
    padding: var(--spacing-section) 0;
}

.qr-generator > .container {
    border: 2px solid var(--color-primary);
    border-radius: 16px;
    padding: 2.5rem;
    background: var(--color-bg);
}

/* --- Type Selector --- */
.qr-types {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.qr-type {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    padding: 1rem 0.5rem;
    background: var(--color-bg);
    border: 2px solid rgba(0,0,0,0.06);
    border-radius: 10px;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    transition: all 0.2s;
}

.qr-type:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

.qr-type.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(1.03);
    box-shadow: 0 4px 12px rgba(255,204,0,0.3);
    font-weight: 600;
}

.qr-type svg {
    flex-shrink: 0;
}

/* --- Two-Column Layout --- */
.qr-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 2.5rem;
    align-items: start;
}

.qr-layout-preview {
    position: sticky;
    top: 100px;
}

.qr-preview-sticky {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
}

/* --- Input Section --- */
.qr-input-section {
    margin-bottom: 1.5rem;
}

.qr-input-group {
    margin-bottom: 1rem;
}

.qr-input-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
    color: var(--color-text);
}

.qr-input-field {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 2px solid rgba(0,0,0,0.08);
    border-radius: 10px;
    font-size: 1.05rem;
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.qr-input-field:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(255,204,0,0.15);
}

.qr-input-field::placeholder {
    color: var(--color-text-muted);
    opacity: 0.6;
}

textarea.qr-input-field {
    resize: vertical;
    min-height: 80px;
}

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

/* --- QR Code Box --- */
.qr-code-box {
    background: var(--color-bg);
    border: 2px solid var(--color-primary);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 1;
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}

.qr-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
    text-align: center;
    color: var(--color-text-muted);
}

.qr-placeholder svg {
    opacity: 0.4;
}

.qr-placeholder p {
    font-size: 0.85rem;
    max-width: 160px;
}

#qr-canvas {
    border-radius: 4px;
}

.qr-display-actions {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    width: 100%;
}

/* --- Buttons --- */
.qr-btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    width: 100%;
    background: var(--color-primary);
    color: var(--color-text);
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.2s;
}

.qr-btn-primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(255,204,0,0.3);
}

.qr-btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    width: 100%;
    background: var(--color-bg-alt);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.2s;
}

.qr-btn-secondary:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

.qr-btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.6rem 1.2rem;
    background: var(--color-bg);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    color: var(--color-text);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all 0.2s;
}

.qr-btn-outline:hover {
    background: var(--color-primary);
    transform: translateY(-1px);
}

.qr-btn-outline-danger {
    border-color: #ef4444;
    color: #B91C1C;
}

.qr-btn-outline-danger:hover {
    background: #FEE2E2;
    border-color: #ef4444;
}

/* --- Section Cards --- */
.qr-section-card {
    background: var(--color-bg-alt);
    border: 1px solid rgba(0,0,0,0.06);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

.qr-section-card h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
    margin-bottom: 1.25rem;
}

.qr-section-card h3 svg {
    color: var(--color-primary-hover);
    flex-shrink: 0;
}

/* --- Resolution Grid --- */
.qr-resolution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.qr-resolution-option {
    cursor: pointer;
}

.qr-resolution-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.qr-resolution-box {
    padding: 0.75rem;
    text-align: center;
    border: 2px solid rgba(0,0,0,0.06);
    border-radius: 8px;
    transition: all 0.2s;
    background: var(--color-bg);
}

.qr-resolution-box:hover {
    border-color: var(--color-primary);
}

.qr-resolution-option input:checked + .qr-resolution-box {
    border-color: var(--color-primary);
    background: var(--color-primary);
}

.qr-resolution-label {
    font-size: 0.85rem;
    font-weight: 600;
}

.qr-resolution-size {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.2rem;
}

.qr-resolution-option input:checked + .qr-resolution-box .qr-resolution-size {
    color: var(--color-text);
}

/* --- Color Section --- */
.qr-color-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.qr-color-section label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.qr-color-picker-row {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
}

.qr-color-picker-row input[type="color"] {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    border: 2px solid rgba(0,0,0,0.08);
    cursor: pointer;
    padding: 2px;
}

.qr-hex-input {
    flex: 1;
}

.qr-hex-input input[type="text"] {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-family: var(--font-body);
    color: var(--color-text);
}

.qr-hex-input input[type="text"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(255,204,0,0.15);
}

.qr-hex-label {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
    display: block;
}

/* --- Presets --- */
.qr-presets {
    margin-top: 1.5rem;
}

.qr-presets h4 {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.75rem;
}

.qr-preset-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
}

.qr-preset {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border: 2px solid rgba(0,0,0,0.06);
    border-radius: 8px;
    background: var(--color-bg);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.8rem;
    transition: border-color 0.2s;
}

.qr-preset:hover {
    border-color: var(--color-primary);
}

.qr-preset-swatch {
    display: flex;
}

.qr-preset-swatch span {
    width: 16px;
    height: 16px;
}

.qr-preset-swatch span:first-child {
    border-radius: 4px 0 0 4px;
}

.qr-preset-swatch span:last-child {
    border-radius: 0 4px 4px 0;
}

/* --- Tips --- */
.qr-tip {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.qr-tip svg {
    flex-shrink: 0;
    color: var(--color-primary-hover);
    margin-top: 2px;
}

/* --- Notice --- */
.qr-notice {
    text-align: center;
    background: var(--color-bg-alt);
    border: 1px solid rgba(0,0,0,0.06);
    padding: 1.5rem;
    border-radius: 12px;
    max-width: 600px;
    margin: 2rem auto 0;
}

.qr-notice h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--color-primary-hover);
}

.qr-notice p {
    font-size: 0.9rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.qr-notice p:last-child {
    margin-bottom: 0;
}

/* --- Tablet --- */
@media (max-width: 900px) {
    .qr-layout {
        grid-template-columns: 1fr;
    }

    .qr-layout-preview {
        position: static;
        order: -1;
    }

    .qr-preview-sticky {
        max-width: 320px;
        margin: 0 auto;
    }

    .qr-resolution-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .qr-preset-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* --- Mobile --- */
@media (max-width: 768px) {
    .qr-types {
        grid-template-columns: repeat(4, 1fr);
        gap: 0.5rem;
    }

    .qr-type {
        padding: 0.75rem 0.25rem;
        font-size: 0.75rem;
    }

    .qr-type svg {
        width: 18px;
        height: 18px;
    }

    .qr-resolution-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .qr-color-grid {
        grid-template-columns: 1fr;
    }

    .qr-preset-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .qr-input-row {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .tool-hero {
        padding: 6.5rem 0 2rem;
    }

    .qr-generator > .container {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .qr-types {
        grid-template-columns: repeat(2, 1fr);
    }
}