/* ============================================
   InvoiceForge - Premium CSS
   ============================================ */

/* === CSS Variables === */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border-color: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #55556a;
    --accent-blue: #4f8fff;
    --accent-blue-glow: rgba(79, 143, 255, 0.15);
    --accent-green: #34d399;
    --accent-green-glow: rgba(52, 211, 153, 0.15);
    --accent-purple: #a78bfa;
    --accent-purple-glow: rgba(167, 139, 250, 0.15);
    --accent-red: #f87171;
    --accent-gold: #fbbf24;
    --gradient-primary: linear-gradient(135deg, #4f8fff 0%, #a78bfa 100%);
    --gradient-text: linear-gradient(135deg, #4f8fff 0%, #818cf8 50%, #a78bfa 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(79, 143, 255, 0.08);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* === Scrollbar === */
::-webkit-scrollbar {
    width: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* === Container === */
.container {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === Selection === */
::selection {
    background: var(--accent-blue);
    color: white;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 0;
}

.nav-container {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
}

.logo-icon {
    width: 28px;
    height: 28px;
    color: var(--accent-blue);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 1px;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-cta {
    display: flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    background: var(--gradient-primary);
    color: white;
    padding: 8px 18px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
    box-shadow: 0 2px 12px rgba(79, 143, 255, 0.3);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(79, 143, 255, 0.4);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 1px;
    transition: var(--transition);
}

/* ============================================
   HERO
   ============================================ */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    padding: 120px 24px 80px;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.3;
    animation: orbFloat 12s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: var(--accent-blue);
    top: -10%;
    right: -5%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-purple);
    bottom: -5%;
    left: -10%;
    animation-delay: -4s;
}

.orb-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-green);
    top: 40%;
    left: 30%;
    opacity: 0.15;
    animation-delay: -8s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 15px) scale(0.95); }
}

.hero-container {
    max-width: 800px;
    text-align: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(79, 143, 255, 0.1);
    border: 1px solid rgba(79, 143, 255, 0.2);
    color: var(--accent-blue);
    padding: 8px 18px;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 28px;
    animation: fadeInUp 0.6s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s ease-out 0.1s both;
}

.gradient-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 620px;
    margin: 0 auto 36px;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 60px;
    animation: fadeInUp 0.6s ease-out 0.3s both;
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    animation: fadeInUp 0.6s ease-out 0.4s both;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-number {
    font-size: 1.4rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-divider {
    width: 1px;
    height: 36px;
    background: var(--border-color);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: none;
    cursor: pointer;
    font-family: var(--font);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 10px 22px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    text-decoration: none;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
    opacity: 0;
    transition: var(--transition);
}

.btn:hover::before {
    opacity: 1;
}

.btn:active {
    transform: scale(0.97);
}

.btn-lg {
    padding: 14px 30px;
    font-size: 1rem;
    border-radius: var(--radius-md);
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 2px 16px rgba(79, 143, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(79, 143, 255, 0.4);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-ghost:hover {
    background: var(--bg-card);
    color: var(--text-primary);
    border-color: var(--border-hover);
}

.btn-danger {
    background: rgba(248, 113, 113, 0.1);
    color: var(--accent-red);
    border: 1px solid rgba(248, 113, 113, 0.15);
}

.btn-danger:hover {
    background: rgba(248, 113, 113, 0.15);
    border-color: rgba(248, 113, 113, 0.3);
}

.btn-pro {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: #1a1a2e;
    font-weight: 700;
    box-shadow: 0 2px 16px rgba(251, 191, 36, 0.3);
}

.btn-pro:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 28px rgba(251, 191, 36, 0.4);
}

.btn-add-item {
    width: 100%;
    padding: 12px;
    background: rgba(79, 143, 255, 0.06);
    color: var(--accent-blue);
    border: 1px dashed rgba(79, 143, 255, 0.2);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
}

.btn-add-item:hover {
    background: rgba(79, 143, 255, 0.1);
    border-color: rgba(79, 143, 255, 0.4);
}

.btn-row {
    display: flex;
    gap: 10px;
}

.btn-row .btn {
    flex: 1;
    font-size: 0.82rem;
    padding: 10px 12px;
}

/* ============================================
   FEATURES
   ============================================ */
.features {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 12px;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(79, 143, 255, 0.3), transparent);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-blue-glow);
    border-radius: var(--radius-sm);
    margin-bottom: 18px;
    color: var(--accent-blue);
}

.feature-icon svg {
    width: 22px;
    height: 22px;
}

.feature-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* ============================================
   GENERATOR
   ============================================ */
.generator {
    padding: 60px 0 100px;
}

.generator-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    align-items: start;
}

/* === Form Panel === */
.form-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: var(--transition);
}

.form-card:hover {
    border-color: var(--border-hover);
}

.form-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border-color);
}

.form-card-header svg {
    width: 20px;
    height: 20px;
    color: var(--accent-blue);
    flex-shrink: 0;
}

.form-card-header h3 {
    font-size: 0.95rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.form-group {
    margin-bottom: 16px;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-label {
    display: block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    font-family: var(--font);
    font-size: 0.9rem;
    color: var(--text-primary);
    transition: var(--transition);
    outline: none;
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px var(--accent-blue-glow);
    background: rgba(255, 255, 255, 0.06);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-muted);
}

/* Date inputs dark mode fix */
input[type="date"].form-input {
    color-scheme: dark;
    cursor: pointer;
}

input[type="date"].form-input::-webkit-calendar-picker-indicator {
    filter: invert(0.7);
    cursor: pointer;
    opacity: 1;
}

.form-textarea {
    resize: vertical;
    min-height: 70px;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238888a0' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
    cursor: pointer;
}

.form-select option {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.form-row .form-group {
    margin-bottom: 0;
}

/* === Logo Upload === */
.logo-upload {
    position: relative;
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 28px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
}

.logo-upload:hover {
    border-color: var(--accent-blue);
    background: var(--accent-blue-glow);
}

.logo-upload.has-logo {
    padding: 12px;
    border-style: solid;
}

.logo-upload-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
}

.logo-upload-content svg {
    width: 32px;
    height: 32px;
    color: var(--text-muted);
}

.logo-upload-content span {
    font-size: 0.88rem;
    font-weight: 500;
}

.logo-upload-content small {
    font-size: 0.75rem;
    opacity: 0.7;
}

.logo-preview-img {
    display: none;
    max-width: 160px;
    max-height: 80px;
    object-fit: contain;
    margin: 0 auto;
}

.logo-upload.has-logo .logo-upload-content {
    display: none;
}

.logo-upload.has-logo .logo-preview-img {
    display: block;
}

.logo-remove-btn {
    display: none;
    position: absolute;
    top: 6px;
    right: 6px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(248, 113, 113, 0.2);
    color: var(--accent-red);
    border: none;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    transition: var(--transition);
}

.logo-remove-btn:hover {
    background: rgba(248, 113, 113, 0.3);
}

.logo-upload.has-logo .logo-remove-btn {
    display: block;
}

/* === Theme Selector === */
.theme-selector {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.theme-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 14px 10px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.theme-option input {
    display: none;
}

.theme-option.active {
    border-color: var(--accent-blue);
    background: var(--accent-blue-glow);
}

.theme-option:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.theme-option.active:hover {
    border-color: var(--accent-blue);
    background: var(--accent-blue-glow);
}

.theme-preview {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.1);
}

.blue-theme {
    background: linear-gradient(135deg, #2563eb, #3b82f6);
}

.dark-theme {
    background: linear-gradient(135deg, #1e1e2e, #374151);
}

.green-theme {
    background: linear-gradient(135deg, #059669, #34d399);
}

.theme-option span {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.theme-option.active span {
    color: var(--accent-blue);
}

/* === Line Items === */
.items-header {
    display: grid;
    grid-template-columns: 1fr 70px 90px 90px 36px;
    gap: 8px;
    padding: 0 0 10px 0;
    font-size: 0.72rem;
    font-weight: 700;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.line-item {
    display: grid;
    grid-template-columns: 1fr 70px 90px 90px 36px;
    gap: 8px;
    margin-bottom: 8px;
    animation: fadeInUp 0.3s ease-out;
}

.line-item .form-input {
    padding: 8px 10px;
    font-size: 0.85rem;
}

.line-item .item-amount {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 10px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.line-item .btn-remove-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 38px;
    background: none;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    font-size: 18px;
}

.line-item .btn-remove-item:hover {
    color: var(--accent-red);
    background: rgba(248, 113, 113, 0.1);
    border-color: rgba(248, 113, 113, 0.2);
}

/* === Form Actions === */
.form-actions {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* === Pro Card === */
.pro-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: linear-gradient(135deg, rgba(251, 191, 36, 0.08), rgba(245, 158, 11, 0.04));
    border: 1px solid rgba(251, 191, 36, 0.15);
}

.pro-card-glow {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(251, 191, 36, 0.12) 0%, transparent 70%);
    pointer-events: none;
}

.pro-card-content {
    position: relative;
    padding: 28px;
}

.pro-badge {
    display: inline-block;
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #1a1a2e;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 800;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.pro-card-content h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.pro-card-content p {
    color: var(--text-secondary);
    font-size: 0.88rem;
    line-height: 1.6;
    margin-bottom: 18px;
}

/* ============================================
   PREVIEW PANEL
   ============================================ */
.preview-panel {
    position: sticky;
    top: 80px;
}

.preview-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.preview-header h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-primary);
}

.preview-badge {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--accent-green);
    background: var(--accent-green-glow);
    padding: 4px 12px;
    border-radius: 100px;
    border: 1px solid rgba(52, 211, 153, 0.2);
}

.preview-scroll-container {
    max-height: calc(100vh - 140px);
    overflow-y: auto;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    background: var(--bg-card);
}

.preview-wrapper {
    padding: 20px;
}

/* === Invoice Preview (White background for PDF) === */
.invoice-preview {
    background: #ffffff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: #1a1a2e;
    font-size: 11px;
    line-height: 1.5;
}

/* ============================================
   INVOICE TEMPLATE STYLES (inside preview)
   ============================================ */
.inv-header {
    padding: 32px 32px 24px;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.inv-brand {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.inv-logo {
    max-width: 120px;
    max-height: 50px;
    object-fit: contain;
    margin-bottom: 6px;
}

.inv-business-name {
    font-size: 18px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.inv-business-details {
    font-size: 10px;
    color: #6b7280;
    line-height: 1.6;
    white-space: pre-line;
}

.inv-title-block {
    text-align: right;
}

.inv-title {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.03em;
    text-transform: uppercase;
    margin-bottom: 10px;
}

.inv-meta {
    font-size: 10px;
    color: #6b7280;
    line-height: 1.8;
}

.inv-meta strong {
    color: #374151;
    font-weight: 600;
}

.inv-color-bar {
    height: 3px;
    margin: 0 32px;
}

.inv-parties {
    display: flex;
    justify-content: space-between;
    padding: 24px 32px;
    gap: 24px;
}

.inv-party {
    flex: 1;
}

.inv-party-label {
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 8px;
    opacity: 0.6;
}

.inv-party-name {
    font-size: 13px;
    font-weight: 700;
    margin-bottom: 4px;
}

.inv-party-details {
    font-size: 10px;
    color: #6b7280;
    line-height: 1.6;
    white-space: pre-line;
}

.inv-table-wrapper {
    padding: 0 32px 24px;
}

.inv-table {
    width: 100%;
    border-collapse: collapse;
}

.inv-table thead th {
    padding: 10px 12px;
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: white;
    text-align: left;
}

.inv-table thead th:nth-child(2),
.inv-table thead th:nth-child(3),
.inv-table thead th:nth-child(4) {
    text-align: right;
}

.inv-table tbody td {
    padding: 10px 12px;
    font-size: 10.5px;
    border-bottom: 1px solid #f0f0f5;
}

.inv-table tbody td:nth-child(2),
.inv-table tbody td:nth-child(3),
.inv-table tbody td:nth-child(4) {
    text-align: right;
}

.inv-table tbody tr:last-child td {
    border-bottom: none;
}

.inv-table .item-desc {
    font-weight: 500;
    color: #1a1a2e;
}

.inv-totals {
    display: flex;
    justify-content: flex-end;
    padding: 0 32px 28px;
}

.inv-totals-table {
    width: 220px;
}

.inv-totals-row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 10.5px;
    color: #6b7280;
}

.inv-totals-row.total {
    border-top: 2px solid #e5e7eb;
    margin-top: 6px;
    padding-top: 10px;
    font-size: 14px;
    font-weight: 800;
    color: #1a1a2e;
}

.inv-total-amount {
    font-weight: 700;
}

.inv-footer {
    padding: 20px 32px 12px;
    border-top: 1px solid #f0f0f5;
}

.inv-notes-section {
    margin-bottom: 12px;
}

.inv-notes-label {
    font-size: 9px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 4px;
    opacity: 0.6;
}

.inv-notes-text {
    font-size: 10px;
    color: #6b7280;
    line-height: 1.6;
    white-space: pre-line;
}

.inv-watermark {
    text-align: center;
    padding: 10px 32px 14px;
    font-size: 8.5px;
    color: #c0c0d0;
    letter-spacing: 0.03em;
}

/* === Theme Colors for Invoice === */
/* Blue Theme */
.theme-blue .inv-title {
    color: #2563eb;
}
.theme-blue .inv-color-bar {
    background: linear-gradient(90deg, #2563eb, #3b82f6);
}
.theme-blue .inv-party-label {
    color: #2563eb;
}
.theme-blue .inv-table thead th {
    background: #2563eb;
}
.theme-blue .inv-totals-row.total .inv-total-amount {
    color: #2563eb;
}
.theme-blue .inv-business-name {
    color: #2563eb;
}

/* Dark Theme */
.theme-dark .inv-title {
    color: #1f2937;
}
.theme-dark .inv-color-bar {
    background: linear-gradient(90deg, #1f2937, #4b5563);
}
.theme-dark .inv-party-label {
    color: #4b5563;
}
.theme-dark .inv-table thead th {
    background: #1f2937;
}
.theme-dark .inv-totals-row.total .inv-total-amount {
    color: #1f2937;
}
.theme-dark .inv-business-name {
    color: #1f2937;
}

/* Green Theme */
.theme-green .inv-title {
    color: #059669;
}
.theme-green .inv-color-bar {
    background: linear-gradient(90deg, #059669, #34d399);
}
.theme-green .inv-party-label {
    color: #059669;
}
.theme-green .inv-table thead th {
    background: #059669;
}
.theme-green .inv-totals-row.total .inv-total-amount {
    color: #059669;
}
.theme-green .inv-business-name {
    color: #059669;
}

/* ============================================
   TOAST
   ============================================ */
.toast {
    position: fixed;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%) translateY(80px);
    background: rgba(18, 18, 26, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    font-weight: 500;
    z-index: 10000;
    pointer-events: none;
    opacity: 0;
    transition: var(--transition-slow);
    box-shadow: var(--shadow-lg);
    white-space: nowrap;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success {
    border-color: rgba(52, 211, 153, 0.3);
}

.toast.error {
    border-color: rgba(248, 113, 113, 0.3);
}

/* ============================================
   LOADING OVERLAY
   ============================================ */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.loading-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.loading-spinner {
    text-align: center;
}

.spinner-ring {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

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

.loading-spinner p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 48px 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
}

.footer-brand .logo-icon {
    width: 24px;
    height: 24px;
    color: var(--accent-blue);
}

.footer-text {
    color: var(--text-muted);
    font-size: 0.88rem;
    max-width: 400px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--accent-blue);
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 8px;
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    /* Force background colors and gradients to print */
    * {
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    body {
        background: #fff !important;
        color: #000 !important;
    }

    /* Hide everything when .is-printing is active */
    body.is-printing > *:not(#invoicePrintArea),
    body.is-printing .toast,
    body.is-printing .loading-overlay {
        display: none !important;
    }

    /* Show only the print area */
    body.is-printing #invoicePrintArea {
        display: block !important;
        width: 100% !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    @page {
        margin: 0;
        size: auto;
    }
}

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

    .preview-panel {
        position: relative;
        top: 0;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 10, 15, 0.95);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-links.open {
        display: flex;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu-btn.open span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    .mobile-menu-btn.open span:nth-child(2) {
        opacity: 0;
    }
    .mobile-menu-btn.open span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 100px 20px 60px;
        min-height: auto;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-stats {
        gap: 20px;
    }

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

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

    .theme-selector {
        grid-template-columns: 1fr;
    }

    .items-header {
        display: none;
    }

    .line-item {
        grid-template-columns: 1fr 1fr;
        gap: 6px;
    }

    .line-item .form-input:first-child {
        grid-column: 1 / -1;
    }

    .line-item .item-amount {
        justify-content: center;
    }

    .line-item .btn-remove-item {
        grid-column: 1 / -1;
        width: 100%;
        justify-content: center;
    }

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

    .hero-actions {
        flex-direction: column;
    }

    .hero-actions .btn {
        width: 100%;
    }

    .inv-header {
        flex-direction: column;
        gap: 16px;
    }

    .inv-title-block {
        text-align: left;
    }

    .inv-parties {
        flex-direction: column;
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .hero-title {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .form-card {
        padding: 18px;
    }

    .inv-header,
    .inv-parties,
    .inv-table-wrapper,
    .inv-totals,
    .inv-footer,
    .inv-watermark {
        padding-left: 20px;
        padding-right: 20px;
    }

    .inv-color-bar {
        margin: 0 20px;
    }
}

/* ============================================
   PRINT / PDF SPECIFIC
   ============================================ */
@media print {
    body {
        background: white;
    }

    .navbar, .hero, .features, .form-panel,
    .preview-header, .footer, .toast,
    .loading-overlay, .pro-card {
        display: none !important;
    }
}