/* Nano Banana Theme Variables (Premium Polish) */
:root {
    --nano-yellow: #FFD700;
    --nano-black: #111111;
    --nano-dark-gray: #222222;
    --nano-light-gray: #f8f9fa;
    --nano-mid-gray: #e9ecef;
    --nano-white: #ffffff;
    --nano-border: #dee2e6;
    --nano-blue: #0d6efd;
    --nano-highlight: #fff3cd;

    --font-heading: 'Space Grotesk', sans-serif;
    --font-body: 'Outfit', sans-serif;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;

    --shadow-soft: 0 4px 12px rgba(0, 0, 0, 0.05);
    --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.04);
}

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

.envelope-app {
    font-family: var(--font-body);
    background-color: var(--nano-light-gray);
    color: var(--nano-black);
    line-height: 1.5;
    width: 100%;
    margin: 0 auto;
    padding: 30px;
    display: flex;
    flex-direction: column;
}

@media (max-width: 768px) {
    .envelope-app {
        padding: 15px;
    }
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding: 0 10px;
}

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

.logo h1 {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--nano-black);
}

.logo .highlight {
    background: var(--nano-yellow);
    padding: 2px 8px;
    border-radius: 6px;
    margin-left: 4px;
}

/* Main Grid */
.tool-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
    align-items: start;
}

@media (min-width: 1024px) {
    .tool-container {
        grid-template-columns: 380px 1fr;
    }

    .preview-panel {
        position: sticky;
        top: 20px;
    }
}

/* CARDS (Step Sections) */
.step-section {
    background: var(--nano-white);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid rgba(0, 0, 0, 0.03);
    box-shadow: var(--shadow-card);
    transition: transform 0.2s, box-shadow 0.2s;
}

.step-section:hover {
    box-shadow: var(--shadow-soft);
}

.step-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.step-num {
    background: var(--nano-black);
    color: var(--nano-yellow);
    font-family: var(--font-heading);
    font-weight: 700;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 0.9rem;
}

.step-section h2 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    color: #1a1a1a;
}

/* Inputs Common */
.input-block {
    margin-bottom: 20px;
}

.input-label {
    display: block;
    font-weight: 700;
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: #444;
}

.nano-select,
.nano-input,
input[type="text"],
input[type="number"],
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--nano-border);
    border-radius: var(--radius-sm);
    background-color: white;
    font-size: 0.95rem;
    font-family: var(--font-body);
    transition: all 0.2s;
}

.nano-select:focus,
textarea:focus,
input:focus {
    outline: none;
    border-color: var(--nano-black);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.05);
}

/* Section 1: Design Controls */
.design-controls {
    margin-top: 20px;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    border: 1px solid var(--nano-border);
    border-radius: var(--radius-sm);
    padding: 4px;
    background: white;
    cursor: pointer;
    height: 42px;
}

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

.color-val {
    margin-left: 8px;
    font-family: monospace;
    font-size: 0.85rem;
    color: #555;
}

.font-controls-row {
    display: flex;
    gap: 6px;
    margin-bottom: 6px;
}

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    color: #555;
    user-select: none;
}

.checkbox-wrapper input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--nano-black);
}

/* Custom Size Inputs (Hidden Logic) */
.hidden {
    display: none !important;
}

.custom-size-inputs {
    margin-top: 12px;
    display: grid;
    grid-template-columns: 1fr 1fr 80px;
    gap: 12px;
    background: var(--nano-light-gray);
    padding: 12px;
    border-radius: var(--radius-sm);
    align-items: end;
}

.input-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    margin-bottom: 4px;
    color: #666;
}

/* File Upload & Remove Button */
.file-upload-wrapper {
    display: flex;
    gap: 10px;
    align-items: center;
    background: var(--nano-light-gray);
    padding: 8px;
    border-radius: var(--radius-sm);
    flex-wrap: nowrap;
}

.nano-file-input {
    width: auto;
    flex: 1;
    font-size: 0.9rem;
    border: none;
    background: transparent;
    padding: 0;
}

.fmt-hint {
    font-size: 0.75rem;
    color: #777;
    margin-top: 6px;
}

.btn-text {
    color: #cc0000;
    font-size: 0.85rem;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    background: white;
    padding: 6px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    white-space: nowrap;
}

.btn-text:hover {
    background: #ffeeee;
}

/* Section 2: Addresses */
.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.badge.required {
    font-size: 0.7rem;
    color: white;
    background: #FF6B6B;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

textarea {
    resize: none;
}

/* Section 4: Actions & Trust */
.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
    align-items: center;
}

.btn {
    width: 100%;
    padding: 14px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-family: var(--font-heading);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 1rem;
    transition: transform 0.1s, box-shadow 0.2s;
    cursor: pointer;
    border: none;
}

.btn:active {
    transform: scale(0.98);
}

.primary-btn {
    background: var(--nano-yellow);
    color: var(--nano-black);
    box-shadow: 0 4px 10px rgba(255, 215, 0, 0.4);
}

.primary-btn:hover {
    background: #e6c200;
}

.secondary-btn {
    background: white;
    border: 2px solid var(--nano-black);
    color: var(--nano-black);
}

.secondary-btn:hover {
    background: var(--nano-light-gray);
}

/* Test Print */
.test-print-wrapper {
    margin: 0 0 20px 0;
}

.checkbox-wrapper-simple {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--nano-black);
    font-size: 0.9rem;
}

.checkbox-wrapper-simple input {
    accent-color: var(--nano-blue);
    width: 18px;
    height: 18px;
}

/* Trust Panel */
.trust-panel {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
    padding: 0;
    align-items: flex-start;
}

.trust-item {
    font-size: 0.85rem;
    font-weight: 500;
    color: #444;
    display: flex;
    align-items: center;
    gap: 8px;
}

.trust-item::before {
    content: "✓";
    font-weight: bold;
    color: var(--nano-black);
}

/* Tip Box */
.print-tip {
    font-size: 0.8rem;
    color: #555;
    background: #fffdf0;
    padding: 12px;
    border-radius: 8px;
    border: 2px dashed var(--nano-yellow);
    line-height: 1.4;
    text-align: center;
}

/* Preview Panel */
.preview-panel {
    min-height: 500px;
    background: var(--nano-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.canvas-wrapper {
    flex: 1;
    background: #e0e0e0;
    border-radius: var(--radius-sm);
    position: relative;
    display: flex;
    flex-direction: column;
    background-image: radial-gradient(#ccc 1px, transparent 1px);
    background-size: 20px 20px;
    overflow: hidden;
}

.canvas-container {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding: 20px;
    cursor: grab;
}

canvas {
    max-width: 100%;
    height: auto;
    object-fit: contain;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    background: white;
}

.preview-toolbar {
    padding: 10px;
    background: #fff;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: flex-end;
}

.helper-panel {
    margin-top: 20px;
    border-top: 1px solid #eee;
    padding-top: 10px;
}

.helper-toggle {
    background: none;
    border: none;
    font-weight: 600;
    color: #666;
    cursor: pointer;
    text-align: left;
    padding: 0;
}

/* =========================================
   PRINT FIX
   ========================================= */
@media print {
    body * {
        visibility: hidden;
        height: 0;
        overflow: hidden;
    }

    .envelope-app {
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        width: 100% !important;
        height: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
        z-index: 99999 !important;
        background: white !important;
        display: block !important;
        visibility: visible !important;
        overflow: visible !important;
    }

    .envelope-app * {
        visibility: visible !important;
        height: auto !important;
    }

    .app-header,
    .controls-panel,
    .preview-toolbar,
    .helper-panel,
    .canvas-feedback {
        display: none !important;
    }

    .tool-container {
        display: block !important;
        grid-template-columns: 1fr !important;
    }

    .preview-panel {
        display: block !important;
        padding: 0 !important;
        box-shadow: none !important;
        border: none !important;
        width: 100% !important;
    }

    .canvas-wrapper {
        background: none !important;
        padding: 0 !important;
        display: block !important;
    }

    .canvas-container {
        padding: 0 !important;
        margin: 0 !important;
        display: block !important;
        text-align: center;
    }

    canvas {
        box-shadow: none !important;
        border: none !important;
        max-width: none !important;
        max-height: none !important;
        width: auto !important;
        height: auto !important;
    }
}