/* ============================================
   Shared Components — Nav, Footer, Buttons,
   Cards, Forms, CTAs
   ============================================ */

/* ---- NAVIGATION ---- */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    padding: var(--space-5) 0;
    transition: background var(--duration-normal) ease,
                box-shadow var(--duration-normal) ease,
                padding var(--duration-normal) ease;
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-md);
    padding: var(--space-3) 0;
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-heading);
    font-weight: var(--fw-bold);
    font-size: var(--text-xl);
    color: var(--color-pure-white);
    transition: color var(--duration-normal) ease;
    z-index: var(--z-overlay);
}

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

.nav.scrolled .nav__logo {
    color: var(--color-dark);
}

.nav__links {
    display: none;
    align-items: center;
    gap: var(--space-8);
}

.nav__link {
    font-size: var(--text-sm);
    font-weight: var(--fw-medium);
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--duration-fast) ease;
    position: relative;
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-brand);
    border-radius: 1px;
    transition: width var(--duration-normal) var(--ease-out);
}

.nav__link:hover::after,
.nav__link.active::after {
    width: 100%;
}

.nav__link:hover {
    color: var(--color-pure-white);
}

.nav.scrolled .nav__link {
    color: var(--color-slate);
}

.nav.scrolled .nav__link:hover {
    color: var(--color-dark);
}

.nav__actions {
    display: none;
    align-items: center;
    gap: var(--space-4);
}

/* Hamburger */
.nav__hamburger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    z-index: var(--z-overlay);
}

.nav__hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-pure-white);
    border-radius: 2px;
    transition: transform var(--duration-normal) ease,
                opacity var(--duration-fast) ease,
                background var(--duration-normal) ease;
}

.nav.scrolled .nav__hamburger span {
    background: var(--color-dark);
}

.nav__hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.nav__hamburger.active span:nth-child(2) {
    opacity: 0;
}

.nav__hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu overlay */
.nav__mobile {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--color-dark);
    z-index: var(--z-nav);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    opacity: 0;
    transition: opacity var(--duration-normal) ease;
}

.nav__mobile.open {
    display: flex;
    opacity: 1;
}

.nav__mobile a {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: var(--fw-semibold);
    color: var(--color-pure-white);
    transition: color var(--duration-fast) ease;
}

.nav__mobile a:hover {
    color: var(--color-cyan);
}

@media (min-width: 1024px) {
    .nav__links { display: flex; }
    .nav__actions { display: flex; }
    .nav__hamburger { display: none; }
}


/* ---- BUTTONS ---- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--fw-semibold);
    border-radius: var(--radius-md);
    transition: all var(--duration-normal) var(--ease-out);
    white-space: nowrap;
    line-height: 1.4;
}

.btn--primary {
    background: var(--gradient-brand);
    color: var(--color-pure-white);
    box-shadow: 0 2px 8px rgba(var(--color-violet-rgb), 0.3);
}

.btn--primary:hover {
    background: var(--gradient-brand-hover);
    box-shadow: 0 4px 16px rgba(var(--color-violet-rgb), 0.4);
    transform: translateY(-1px);
}

.btn--secondary {
    background: transparent;
    color: var(--color-pure-white);
    border: 1.5px solid rgba(255, 255, 255, 0.4);
}

.btn--secondary:hover {
    border-color: var(--color-pure-white);
    background: rgba(255, 255, 255, 0.08);
}

.btn--secondary-dark {
    color: var(--color-violet);
    border: 1.5px solid var(--color-violet);
    background: transparent;
}

.btn--secondary-dark:hover {
    background: rgba(var(--color-violet-rgb), 0.06);
}

.btn--ghost {
    background: transparent;
    color: var(--color-violet);
    padding: var(--space-2) var(--space-4);
}

.btn--ghost:hover {
    background: rgba(var(--color-violet-rgb), 0.06);
}

.btn--lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
    border-radius: var(--radius-lg);
}

.btn--sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

.btn--full {
    width: 100%;
}

.btn svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.btn--lg svg {
    width: 20px;
    height: 20px;
}


/* ---- CARDS ---- */

.card {
    background: var(--color-pure-white);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    border: 1px solid var(--color-gray);
    transition: transform var(--duration-normal) var(--ease-out),
                box-shadow var(--duration-normal) var(--ease-out);
}

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

.card__icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: rgba(var(--color-violet-rgb), 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
}

.card__icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-violet);
}

.card__title {
    font-family: var(--font-heading);
    font-size: var(--text-lg);
    font-weight: var(--fw-semibold);
    color: var(--color-dark);
    margin-bottom: var(--space-3);
}

.card__text {
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
    color: var(--color-slate);
}


/* ---- FORMS ---- */

.form-group {
    margin-bottom: var(--space-5);
}

.form-label {
    display: block;
    font-size: var(--text-sm);
    font-weight: var(--fw-medium);
    color: var(--color-dark);
    margin-bottom: var(--space-2);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    color: var(--color-dark);
    background: var(--color-pure-white);
    border: 1.5px solid var(--color-gray);
    border-radius: var(--radius-md);
    transition: border-color var(--duration-fast) ease,
                box-shadow var(--duration-fast) ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-violet);
    box-shadow: 0 0 0 3px rgba(var(--color-violet-rgb), 0.12);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--color-slate);
    opacity: 0.5;
}

.form-textarea {
    min-height: 120px;
    resize: vertical;
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2364748B' viewBox='0 0 16 16'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: var(--space-10);
}

.form-error {
    font-size: var(--text-xs);
    color: var(--color-coral);
    margin-top: var(--space-1);
}

.form-input.error,
.form-select.error {
    border-color: var(--color-coral);
}


/* ---- CTA BANNER ---- */

.cta-banner {
    background: var(--gradient-dark);
    padding: var(--space-16) 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-banner::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    pointer-events: none;
}

.cta-banner h2 {
    color: var(--color-pure-white);
    margin-bottom: var(--space-4);
    position: relative;
}

.cta-banner p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--text-lg);
    margin-bottom: var(--space-8);
    position: relative;
}

.cta-banner .btn {
    position: relative;
}


/* ---- FOOTER ---- */

.footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.6);
    padding: var(--space-16) 0 var(--space-8);
}

.footer__inner {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-10);
    margin-bottom: var(--space-12);
}

.footer__brand {
    max-width: 320px;
}

.footer__brand .nav__logo {
    margin-bottom: var(--space-4);
    font-size: var(--text-2xl);
}

.footer__brand p {
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

.footer__heading {
    font-family: var(--font-heading);
    font-size: var(--text-sm);
    font-weight: var(--fw-semibold);
    color: var(--color-pure-white);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-5);
}

.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.footer__links a {
    font-size: var(--text-sm);
    color: rgba(255, 255, 255, 0.5);
    transition: color var(--duration-fast) ease;
}

.footer__links a:hover {
    color: var(--color-cyan);
}

.footer__socials {
    display: flex;
    gap: var(--space-4);
}

.footer__social-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--duration-fast) ease;
}

.footer__social-icon:hover {
    background: rgba(var(--color-violet-rgb), 0.4);
}

.footer__social-icon svg {
    width: 18px;
    height: 18px;
    color: var(--color-pure-white);
}

.footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: var(--space-8);
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    align-items: center;
    text-align: center;
}

.footer__copyright {
    font-size: var(--text-xs);
    color: rgba(255, 255, 255, 0.35);
}

@media (min-width: 768px) {
    .footer__inner {
        grid-template-columns: 2fr 1fr 1fr 1fr;
    }

    .footer__bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}


/* ---- PAGE HEADER (for inner pages) ---- */

.page-header {
    background: var(--gradient-dark);
    padding: calc(80px + var(--space-16)) 0 var(--space-16);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-mesh);
    pointer-events: none;
}

.page-header h1 {
    color: var(--color-pure-white);
    margin-bottom: var(--space-4);
    position: relative;
}

.page-header p {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--text-lg);
    max-width: 560px;
    margin: 0 auto;
    position: relative;
}