/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6C5CE7;
    --primary-dark: #5A4BD1;
    --primary-light: #A29BFE;
    --accent: #00CEC9;
    --accent-dark: #00B5B0;
    --bg: #0F0F1A;
    --bg-card: #1A1A2E;
    --bg-card-hover: #222240;
    --bg-input: #16162B;
    --border: #2D2D50;
    --border-focus: #6C5CE7;
    --text: #E8E8F0;
    --text-muted: #8888AA;
    --text-dim: #555577;
    --success: #00E676;
    --danger: #FF5252;
    --warning: #FFD740;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 48px rgba(0, 0, 0, 0.4);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--bg);
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ===== APP LAYOUT ===== */
.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ===== HEADER ===== */
.header {
    background: linear-gradient(135deg, var(--bg-card) 0%, #1E1E3A 100%);
    border-bottom: 1px solid var(--border);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 300;
    letter-spacing: 2px;
    color: var(--text);
}

.logo i {
    font-size: 1.8rem;
    color: var(--primary);
    filter: drop-shadow(0 0 8px rgba(108, 92, 231, 0.4));
}

.logo strong {
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.5px;
}

/* ===== MAIN ===== */
.main {
    flex: 1;
    padding: 32px 24px;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
}

/* ===== PANELS ===== */
.panel {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow);
}

.panel-right {
    position: sticky;
    top: 100px;
}

.panel-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}

.panel-title i {
    color: var(--primary);
    font-size: 1rem;
}

/* ===== TYPE SELECTOR ===== */
.type-selector {
    margin-bottom: 24px;
}

.type-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-top: 10px;
}

.type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 14px 8px;
    background: var(--bg-input);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.72rem;
    font-family: inherit;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.type-btn i {
    font-size: 1.2rem;
    transition: var(--transition);
}

.type-btn:hover {
    border-color: var(--primary-light);
    color: var(--text);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.type-btn.active {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(108, 92, 231, 0.1);
    box-shadow: 0 0 16px rgba(108, 92, 231, 0.15);
}

.type-btn.active i {
    color: var(--primary);
    filter: drop-shadow(0 0 6px rgba(108, 92, 231, 0.4));
}

/* ===== LABELS ===== */
.label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    margin-bottom: 8px;
}

/* ===== FORM ===== */
.form-area {
    margin-bottom: 24px;
}

.form-group {
    display: none;
}

.form-group.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-input);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: inherit;
    font-size: 0.95rem;
    transition: var(--transition);
    outline: none;
}

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

.input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

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

.radio-group {
    display: flex;
    gap: 20px;
    margin-top: 8px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.radio-label:hover {
    color: var(--text);
}

.radio-label input[type="radio"] {
    accent-color: var(--primary);
    width: 16px;
    height: 16px;
}

/* ===== CUSTOMIZATION ===== */
.customization {
    margin-bottom: 24px;
    padding: 20px;
    background: var(--bg-input);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.color-row {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
}

.color-field {
    flex: 1;
}

.color-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-bottom: 8px;
    font-weight: 500;
}

.color-input-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 12px;
    transition: var(--transition);
}

.color-input-wrap:hover {
    border-color: var(--primary-light);
}

.color-input {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    background: none;
    padding: 0;
}

.color-input::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-input::-webkit-color-swatch {
    border: 2px solid var(--border);
    border-radius: 6px;
}

.color-hex {
    font-size: 0.82rem;
    color: var(--text-muted);
    font-family: 'Courier New', monospace;
    font-weight: 600;
}

/* ===== SIZE SLIDER ===== */
.size-field {
    margin-bottom: 20px;
}

.range-input {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border);
    border-radius: 3px;
    outline: none;
    margin-top: 4px;
}

.range-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 8px rgba(108, 92, 231, 0.4);
    transition: var(--transition);
}

.range-input::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 16px rgba(108, 92, 231, 0.6);
}

.range-labels {
    display: flex;
    justify-content: space-between;
    margin-top: 6px;
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* ===== LOGO UPLOAD ===== */
.logo-upload {
    margin-top: 8px;
}

.logo-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 24px;
    border: 2px dashed var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-muted);
}

.logo-placeholder:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(108, 92, 231, 0.05);
}

.logo-placeholder i {
    font-size: 1.5rem;
}

.logo-placeholder span {
    font-size: 0.82rem;
    font-weight: 500;
}

.logo-preview {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px;
    background: var(--bg-card);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
}

.logo-preview img {
    max-width: 80px;
    max-height: 80px;
    border-radius: 6px;
    object-fit: contain;
}

.logo-remove {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--danger);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    transition: var(--transition);
    box-shadow: 0 2px 8px rgba(255, 82, 82, 0.3);
}

.logo-remove:hover {
    transform: scale(1.15);
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

.btn-generate {
    width: 100%;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    font-size: 1rem;
    padding: 16px;
    box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
}

.btn-generate:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(108, 92, 231, 0.5);
}

.btn-generate:active {
    transform: translateY(0);
}

/* ===== PREVIEW ===== */
.preview-area {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 360px;
    background: var(--bg-input);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 32px;
    margin-bottom: 20px;
    transition: var(--transition);
}

.preview-area.has-qr {
    border-style: solid;
    border-color: var(--primary);
    background: white;
}

.preview-placeholder {
    text-align: center;
    color: var(--text-muted);
}

.preview-placeholder i {
    font-size: 4rem;
    opacity: 0.2;
    margin-bottom: 16px;
    display: block;
}

.preview-placeholder p {
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 6px;
}

.preview-placeholder span {
    font-size: 0.82rem;
    opacity: 0.6;
}

.preview-qr {
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-qr canvas {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
}

/* ===== EXPORT BUTTONS ===== */
.export-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.btn-export {
    padding: 12px 16px;
    font-size: 0.78rem;
    letter-spacing: 0.5px;
    border-radius: var(--radius-sm);
}

.btn-png {
    background: linear-gradient(135deg, #00CEC9, #00B5B0);
    color: white;
}

.btn-png:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0, 206, 201, 0.3);
}

.btn-svg {
    background: linear-gradient(135deg, #FD79A8, #E84393);
    color: white;
}

.btn-svg:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(232, 67, 147, 0.3);
}

.btn-pdf {
    background: linear-gradient(135deg, #FF7675, #D63031);
    color: white;
}

.btn-pdf:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(214, 48, 49, 0.3);
}

/* ===== FOOTER ===== */
.footer {
    text-align: center;
    padding: 20px 24px;
    color: var(--text-muted);
    font-size: 0.82rem;
    border-top: 1px solid var(--border);
    background: var(--bg-card);
}

/* ===== TOAST NOTIFICATION ===== */
.toast {
    position: fixed;
    bottom: 32px;
    right: 32px;
    padding: 14px 24px;
    border-radius: var(--radius-sm);
    color: white;
    font-weight: 500;
    font-size: 0.9rem;
    z-index: 9999;
    animation: slideIn 0.4s ease, fadeOut 0.4s ease 2.6s forwards;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.success {
    background: linear-gradient(135deg, #00E676, #00C853);
}

.toast.error {
    background: linear-gradient(135deg, #FF5252, #D32F2F);
}

.toast.info {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* ===== LOADING ANIMATION ===== */
.btn-generate.loading {
    pointer-events: none;
    opacity: 0.8;
}

.btn-generate.loading i {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .container {
        grid-template-columns: 1fr;
    }

    .panel-right {
        position: static;
    }

    .header-content {
        flex-direction: column;
        gap: 4px;
        text-align: center;
    }
}

@media (max-width: 640px) {
    .type-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .export-buttons {
        grid-template-columns: 1fr;
    }

    .color-row {
        flex-direction: column;
    }

    .main {
        padding: 16px 12px;
    }

    .panel {
        padding: 20px 16px;
    }

    .radio-group {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 420px) {
    .type-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}