/* ============================================
   Custom CSS — Samuel Ferreira Adv
   Animations, transitions & styles beyond Tailwind
   ============================================ */

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

/* --- Fade-in Animation Classes --- */
.fade-in-hidden {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Stagger Delays for Cards --- */
.stagger-1 {
    transition-delay: 0.1s;
}

.stagger-2 {
    transition-delay: 0.2s;
}

.stagger-3 {
    transition-delay: 0.3s;
}

.stagger-4 {
    transition-delay: 0.4s;
}

.stagger-5 {
    transition-delay: 0.5s;
}

.stagger-6 {
    transition-delay: 0.6s;
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
    .fade-in-hidden {
        opacity: 1;
        transform: none;
        transition: none;
    }

    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* --- Mobile Menu Transitions --- */
#mobile-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease-in-out, opacity 0.3s ease-in-out;
    opacity: 0;
}

#mobile-menu.open {
    max-height: 400px;
    opacity: 1;
}

/* --- Hamburger Icon Animation --- */
.hamburger-line {
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger-active .hamburger-line:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.hamburger-active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.hamburger-active .hamburger-line:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* --- Active Nav Link --- */
.nav-link-active {
    color: #111827;
    font-weight: 600;
}

/* --- Card Hover Lift --- */
.card-hover {
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.card-hover:hover {
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1),
        0 8px 10px -6px rgba(0, 0, 0, 0.1);
    transform: translateY(-4px);
}

/* --- CTA Gradient Background --- */
.cta-gradient {
    background: linear-gradient(135deg, #000000 0%, #1f2937 100%);
}

/* --- Form Error/Success States --- */
.input-error {
    border-color: #dc2626;
}

.input-success {
    border-color: #16a34a;
}

.error-message {
    color: #dc2626;
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* --- Accordion Component --- */
.accordion-container {
    border-top: 1px solid #e5e7eb;
}

.accordion-item {
    border-bottom: 1px solid #e5e7eb;
}

.accordion-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 1.5rem 0;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: padding 0.3s ease;
}

.accordion-header:hover {
    padding-left: 0.5rem;
}

.accordion-header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.accordion-number {
    font-size: 0.75rem;
    font-weight: 700;
    color: #9ca3af;
    letter-spacing: 0.05em;
    min-width: 1.75rem;
    font-variant-numeric: tabular-nums;
}

.accordion-icon {
    width: 1.5rem;
    height: 1.5rem;
    color: #111827;
    flex-shrink: 0;
    transition: color 0.3s ease;
}

.accordion-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: #111827;
    transition: color 0.3s ease;
}

@media (min-width: 768px) {
    .accordion-header {
        padding: 2rem 0;
    }

    .accordion-header:hover {
        padding-left: 1rem;
    }

    .accordion-number {
        font-size: 0.875rem;
        min-width: 2rem;
    }

    .accordion-icon {
        width: 1.75rem;
        height: 1.75rem;
    }

    .accordion-title {
        font-size: 1.375rem;
    }
}

.accordion-chevron {
    width: 1.25rem;
    height: 1.25rem;
    color: #9ca3af;
    flex-shrink: 0;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), color 0.3s ease;
}

.accordion-item.active .accordion-chevron {
    transform: rotate(180deg);
    color: #111827;
}

.accordion-item.active .accordion-number {
    color: #111827;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.accordion-body {
    padding: 0 0 2rem 2.75rem;
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 0.3s ease 0.1s, transform 0.3s ease 0.1s;
}

@media (min-width: 768px) {
    .accordion-body {
        padding: 0 0 2.5rem 3.75rem;
    }
}

.accordion-item.active .accordion-body {
    opacity: 1;
    transform: translateY(0);
}