/* ============================================================
   Invoice Generator Landing Pages - Shared CSS
   ============================================================ */

/* ---- Variables ---- */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary: #667eea;
    --primary-dark: #5a67d8;
    --dark: #1a202c;
    --gray-100: #f7fafc;
    --gray-200: #edf2f7;
    --gray-400: #a0aec0;
    --gray-500: #718096;
    --gray-700: #4a5568;
    --white: #ffffff;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
    --shadow-lg: 0 20px 60px rgba(0,0,0,0.12);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================================
   GENERATOR HERO
   ============================================================ */
.generator-hero {
    padding: 3rem 0 2rem;
    text-align: center;
}

.generator-hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1.2rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 1.25rem;
    background: linear-gradient(135deg, rgba(102,126,234,0.12), rgba(118,75,162,0.12));
    color: var(--primary);
    border: 1px solid rgba(102,126,234,0.25);
    animation: fadeSlideDown 0.5s ease both;
}

.generator-hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 1rem;
    line-height: 1.15;
    letter-spacing: -0.025em;
    animation: fadeSlideDown 0.55s 0.05s ease both;
}

.generator-hero p.lead {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--gray-500);
    max-width: 620px;
    margin: 0 auto 1.5rem;
    line-height: 1.7;
    animation: fadeSlideDown 0.6s 0.1s ease both;
}

.generator-hero-trust {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
    animation: fadeSlideDown 0.65s 0.15s ease both;
}

.generator-hero-trust span {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.875rem;
    color: var(--gray-500);
    font-weight: 500;
}

.generator-hero-trust .check {
    color: #48bb78;
    font-weight: 700;
}

/* ============================================================
   GENERATOR TABS WRAPPER (tabs + form)
   ============================================================ */
.generator-tool-wrapper {
    animation: fadeSlideUp 0.7s 0.2s ease both;
    margin-bottom: 4rem;
}

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.how-it-works {
    padding: 4rem 0;
    background: var(--gray-100);
    border-radius: var(--radius);
    margin-bottom: 4rem;
}

.how-it-works h2,
.features-section h2,
.use-cases-section h2,
.faq-section h2 {
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 800;
    color: var(--dark);
    text-align: center;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--gray-500);
    font-size: 1rem;
    margin-bottom: 3rem;
    max-width: 550px;
    margin-left: auto;
    margin-right: auto;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
    position: relative;
}

.step-card {
    text-align: center;
    position: relative;
    padding: 1.5rem;
}

.step-number {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    font-size: 1.4rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.25rem;
    box-shadow: 0 8px 20px rgba(102,126,234,0.35);
    transition: var(--transition);
}

.step-card:hover .step-number {
    transform: scale(1.1) translateY(-3px);
    box-shadow: 0 12px 28px rgba(102,126,234,0.45);
}

.step-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.step-card p {
    font-size: 0.9rem;
    color: var(--gray-500);
    line-height: 1.6;
}

/* ============================================================
   FEATURES GRID
   ============================================================ */
.features-section {
    padding: 4rem 0;
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin: 0 auto;
}

.feature-item {
    background: white;
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.feature-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: rgba(102,126,234,0.2);
}

.feature-icon-wrap {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(102,126,234,0.1), rgba(118,75,162,0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.feature-item h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.25rem;
}

.feature-item p {
    font-size: 0.85rem;
    color: var(--gray-500);
    line-height: 1.6;
    margin: 0;
}

/* ============================================================
   USE CASES
   ============================================================ */
.use-cases-section {
    padding: 4rem 0;
    background: var(--gray-100);
    border-radius: var(--radius);
    margin-bottom: 4rem;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.use-case-card {
    background: white;
    border-radius: var(--radius-sm);
    padding: 1.75rem 1.5rem;
    text-align: center;
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.use-case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.use-case-icon {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    display: block;
}

.use-case-card h3 {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}

.use-case-card p {
    font-size: 0.85rem;
    color: var(--gray-500);
    line-height: 1.6;
    margin: 0;
}

/* ============================================================
   FAQ ACCORDION
   ============================================================ */
.faq-section {
    padding: 4rem 0;
    margin-bottom: 4rem;
}

.faq-list {
    max-width: 780px;
    margin: 0 auto;
}

.faq-item {
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    background: white;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: rgba(102,126,234,0.3);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.1rem 1.5rem;
    cursor: pointer;
    user-select: none;
    gap: 1rem;
}

.faq-question h3 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dark);
    margin: 0;
    line-height: 1.5;
}

.faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.1rem;
    font-weight: 700;
    flex-shrink: 0;
    transition: var(--transition);
}

.faq-item.open .faq-icon {
    background: var(--primary-gradient);
    color: white;
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
    padding: 0 1.5rem;
}

.faq-item.open .faq-answer {
    max-height: 300px;
    padding: 0 1.5rem 1.25rem;
}

.faq-answer p {
    color: var(--gray-500);
    font-size: 0.9rem;
    line-height: 1.7;
    margin: 0;
}

/* ============================================================
   CTA BOTTOM
   ============================================================ */
.generator-cta-section {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--primary-gradient);
    border-radius: var(--radius);
    margin-bottom: 4rem;
    position: relative;
    overflow: hidden;
}

.generator-cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -20%;
    width: 60%;
    height: 200%;
    background: rgba(255,255,255,0.05);
    border-radius: 50%;
    pointer-events: none;
}

.generator-cta-section h2 {
    color: white;
    font-size: clamp(1.5rem, 2.5vw, 2rem);
    font-weight: 800;
    margin-bottom: 0.75rem;
}

.generator-cta-section p {
    color: rgba(255,255,255,0.85);
    font-size: 1rem;
    margin-bottom: 2rem;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.btn-cta-white {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: white;
    color: var(--primary);
    padding: 0.9rem 2.25rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.btn-cta-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 14px 35px rgba(0,0,0,0.2);
    color: var(--primary-dark);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeSlideDown {
    from { opacity: 0; transform: translateY(-16px); }
    to   { opacity: 1; transform: translateY(0); }
}

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

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 768px) {
    .generator-hero { padding: 2rem 0 1.5rem; }
    .generator-hero h1 { font-size: 1.75rem; }
    .steps-grid { grid-template-columns: 1fr; gap: 1rem; }
    .features-grid { grid-template-columns: 1fr; }
    .use-cases-grid { grid-template-columns: repeat(2, 1fr); }
    .generator-cta-section { padding: 3rem 1.5rem; }
    .generator-hero-trust { gap: 1rem; }
}

@media (max-width: 480px) {
    .use-cases-grid { grid-template-columns: 1fr; }
    .feature-item { flex-direction: column; }
}