/* ============================================
   PizzaHot B2B Landing — styles.css
   Mobile-first, CSS Variables, Responsive
   ============================================ */

/* ===== CSS VARIABLES ===== */
:root {
    /* Colors */
    --color-primary: #ED1C24;
    --color-primary-dark: #C4151C;
    --color-primary-light: #FF4D52;
    --color-dark: #171717;
    --color-dark-secondary: #2D2D2D;
    --color-yellow: #FFD92F;
    --color-yellow-dark: #E6C000;
    --color-light: #F6F6F6;
    --color-white: #FFFFFF;
    --color-gray: #6B7280;
    --color-gray-light: #E5E7EB;
    --color-success: #22c55e;
    --color-error: #EF4444;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Layout */
    --container-max: 1240px;
    --container-padding: 1rem;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --transition: 0.3s ease;
    --transition-fast: 0.15s ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-dark);
    background-color: var(--color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input {
    font-family: inherit;
}

/* Focus states for accessibility */
:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
}

/* ===== UTILITIES ===== */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.hidden {
    display: none !important;
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: var(--font-size-base);
    border-radius: var(--border-radius-sm);
    padding: 0.75rem 1.5rem;
    transition: background-color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    white-space: nowrap;
    text-align: center;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn--primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn--primary:hover {
    background-color: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
}

.btn--yellow {
    background-color: var(--color-yellow);
    color: var(--color-dark);
}

.btn--yellow:hover {
    background-color: var(--color-yellow-dark);
    box-shadow: var(--shadow-md);
}

.btn--outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn--outline:hover {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn--sm {
    padding: 0.5rem 1rem;
    font-size: var(--font-size-sm);
}

.btn--lg {
    padding: 1rem 2rem;
    font-size: var(--font-size-lg);
    border-radius: var(--border-radius);
}

/* ===== HEADER ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: var(--space-md);
}

.header__logo-img {
    height: 36px;
    width: auto;
}

.header__nav {
    display: none;
}

.header__nav-list {
    display: flex;
    gap: var(--space-lg);
}

.header__nav-link {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-dark);
    transition: color var(--transition-fast);
    padding: var(--space-xs) 0;
}

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

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

.header__phone {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-dark);
    transition: color var(--transition-fast);
}

.header__phone:hover {
    color: var(--color-primary);
}

.header__burger {
    display: flex;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
}

.header__burger-line {
    width: 24px;
    height: 2px;
    background-color: var(--color-dark);
    transition: transform var(--transition), opacity var(--transition);
}

.header__burger.active .header__burger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.header__burger.active .header__burger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav */
.header__nav.open {
    display: block;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    box-shadow: var(--shadow-lg);
    padding: var(--space-lg);
}

.header__nav.open .header__nav-list {
    flex-direction: column;
    gap: var(--space-md);
}

.header__nav.open .header__nav-link {
    font-size: var(--font-size-base);
    display: block;
    padding: var(--space-sm) 0;
}

/* ===== HERO ===== */
.hero {
    padding-top: 80px;
    padding-bottom: var(--space-2xl);
    background: linear-gradient(135deg, var(--color-white) 0%, var(--color-light) 100%);
    overflow: hidden;
}

.hero__inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.hero__title {
    font-size: var(--font-size-3xl);
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-dark);
    margin-bottom: var(--space-sm);
}

.hero__subtitle {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--space-md);
}

.hero__description {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    margin-bottom: var(--space-lg);
    max-width: 560px;
}

.hero__features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm) var(--space-lg);
    margin-bottom: var(--space-xl);
}

.hero__feature {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-dark);
}

.hero__feature-icon {
    color: var(--color-primary);
    flex-shrink: 0;
}

.hero__cta-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-sm);
}

.hero__microtext {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
}

.hero__image {
    order: -1;
}

.hero__img {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    aspect-ratio: 6/5;
    object-fit: cover;
}

/* ===== SECTIONS ===== */
.section {
    padding: var(--space-3xl) 0;
}

.section--light {
    background-color: var(--color-light);
}

.section--dark {
    background-color: var(--color-dark);
    color: var(--color-white);
}

.section--cta {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-align: center;
}

.section--proof {
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-light);
    border-bottom: 1px solid var(--color-gray-light);
}

.section__title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-xl);
    line-height: 1.3;
}

.section__title--light {
    color: var(--color-white);
}

.section__subtitle {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    text-align: center;
    max-width: 640px;
    margin: 0 auto var(--space-2xl);
}

.section__subtitle--light {
    color: rgba(255, 255, 255, 0.85);
}

.section__cta-block {
    text-align: center;
    margin-top: var(--space-2xl);
}

.section__cta-note {
    margin-top: var(--space-md);
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

/* ===== CARDS GRID ===== */
.cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
}

.card {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card--accent {
    border-left: 4px solid var(--color-primary);
}

.card__icon {
    margin-bottom: var(--space-md);
    color: var(--color-gray);
}

.card__icon--red {
    color: var(--color-primary);
}

.card__title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.card__text {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
    line-height: 1.6;
}

/* ===== STEPS ===== */
.steps {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    max-width: 700px;
    margin: 0 auto;
    counter-reset: step;
}

.steps__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.steps__number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    min-width: 40px;
    border-radius: 50%;
    background-color: var(--color-yellow);
    color: var(--color-dark);
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.steps__text {
    font-size: var(--font-size-base);
    padding-top: var(--space-sm);
    color: rgba(255, 255, 255, 0.9);
}

/* ===== REQUIREMENTS ===== */
.requirements {
    max-width: 700px;
    margin: 0 auto;
}

.requirements__list {
    margin-bottom: var(--space-xl);
}

.requirements__item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
    font-size: var(--font-size-base);
}

.requirements__icon {
    color: var(--color-success);
    flex-shrink: 0;
    margin-top: 2px;
}

.requirements__note {
    background-color: var(--color-white);
    border-radius: var(--border-radius-sm);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    border-left: 4px solid var(--color-yellow);
    font-size: var(--font-size-sm);
    color: var(--color-gray);
}

.requirements__info {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    background-color: var(--color-white);
    border-radius: var(--border-radius-sm);
    padding: var(--space-lg);
    font-size: var(--font-size-sm);
    color: var(--color-gray);
}

.requirements__info svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

/* ===== ASSORTMENT ===== */
.assortment-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.product-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: box-shadow var(--transition), transform var(--transition);
    cursor: pointer;
}

.product-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.product-card__img {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    background-color: var(--color-light);
}

.product-card__body {
    padding: var(--space-sm) var(--space-md) var(--space-md);
}

.product-card__name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.product-card__meta {
    font-size: var(--font-size-xs);
    color: var(--color-gray);
    margin-bottom: var(--space-xs);
}

.product-card__price {
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--color-primary);
}

.assortment__note {
    font-size: var(--font-size-sm);
    color: var(--color-gray);
    text-align: center;
    font-style: italic;
}

/* ===== CONDITIONS ===== */
.conditions-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-md);
}

.condition-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius-sm);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
}

.condition-card__label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-gray);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-xs);
}

.condition-card__value {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-dark);
}

/* ===== SOCIAL PROOF ===== */
.proof {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.proof__text {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    margin-bottom: var(--space-xl);
}

.proof__stat {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-md);
}

.proof__number {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    color: var(--color-primary);
}

.proof__label {
    font-size: var(--font-size-base);
    color: var(--color-gray);
    text-align: left;
}

/* ===== FAQ ===== */
.faq {
    max-width: 760px;
    margin: 0 auto;
}

.faq__item {
    border-bottom: 1px solid var(--color-gray-light);
}

.faq__question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-lg) 0;
    font-size: var(--font-size-base);
    font-weight: 600;
    text-align: left;
    color: var(--color-dark);
    gap: var(--space-md);
    transition: color var(--transition-fast);
}

.faq__question:hover {
    color: var(--color-primary);
}

.faq__arrow {
    flex-shrink: 0;
    transition: transform var(--transition);
}

.faq__question[aria-expanded="true"] .faq__arrow {
    transform: rotate(180deg);
}

.faq__answer {
    padding-bottom: var(--space-lg);
    font-size: var(--font-size-base);
    color: var(--color-gray);
    line-height: 1.7;
}

/* ===== FORM ===== */
.form-wrapper {
    max-width: 560px;
    margin: 0 auto;
}

.form__group {
    margin-bottom: var(--space-lg);
}

.form__label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--space-xs);
    color: var(--color-dark);
}

.form__required {
    color: var(--color-primary);
}

.form__input {
    width: 100%;
    padding: 0.875rem 1rem;
    font-size: var(--font-size-base);
    border: 2px solid var(--color-gray-light);
    border-radius: var(--border-radius-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
    background-color: var(--color-white);
}

.form__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(237, 28, 36, 0.1);
}

.form__input--error {
    border-color: var(--color-error);
}

.form__error {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--color-error);
    margin-top: var(--space-xs);
    min-height: 1rem;
}

.form__submit {
    width: 100%;
    position: relative;
}

.form__submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.form__consent {
    font-size: var(--font-size-xs);
    color: var(--color-gray);
    margin-top: var(--space-md);
    text-align: center;
}

.form__success {
    text-align: center;
    padding: var(--space-2xl);
}

.form__success-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: var(--space-md) 0 var(--space-sm);
}

.form__success-text {
    font-size: var(--font-size-base);
    color: var(--color-gray);
}

/* ===== FOOTER ===== */
.footer {
    background-color: var(--color-dark);
    color: var(--color-white);
    padding: var(--space-2xl) 0;
}

.footer__inner {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.footer__logo {
    height: 32px;
    width: auto;
    margin-bottom: var(--space-md);
}

.footer__description {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
    max-width: 300px;
}

.footer__contacts {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer__link {
    font-size: var(--font-size-base);
    color: var(--color-white);
    transition: color var(--transition-fast);
}

.footer__link:hover {
    color: var(--color-yellow);
}

.footer__location {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.6);
}

.footer__bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer__copyright {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.5);
}

.footer__scroll-top {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white);
    transition: background-color var(--transition-fast);
}

.footer__scroll-top:hover {
    background-color: var(--color-primary);
}

/* ===== MOBILE STICKY CTA ===== */
.mobile-cta {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999;
    padding: var(--space-sm) var(--container-padding);
    background-color: var(--color-white);
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
    transform: translateY(100%);
    transition: transform var(--transition);
}

.mobile-cta.visible {
    transform: translateY(0);
}

.btn--mobile-cta {
    width: 100%;
    padding: 0.875rem;
    font-size: var(--font-size-base);
}

/* ===== ANIMATIONS ===== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== RESPONSIVE: 480px+ ===== */
@media (min-width: 480px) {
    .hero__cta-group {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .assortment-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

/* ===== RESPONSIVE: 768px+ ===== */
@media (min-width: 768px) {
    :root {
        --container-padding: 1.5rem;
    }

    .header__inner {
        height: 72px;
    }

    .header__nav {
        display: block;
    }

    .header__actions {
        display: flex;
    }

    .header__burger {
        display: none;
    }

    .hero {
        padding-top: 100px;
        padding-bottom: var(--space-3xl);
    }

    .hero__inner {
        flex-direction: row;
        align-items: center;
        gap: var(--space-2xl);
    }

    .hero__content {
        flex: 1;
    }

    .hero__image {
        order: 0;
        flex: 0 0 45%;
    }

    .hero__title {
        font-size: var(--font-size-4xl);
    }

    .section {
        padding: var(--space-4xl) 0;
    }

    .section__title {
        font-size: var(--font-size-3xl);
    }

    .cards-grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .assortment-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .conditions-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer__inner {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
    }

    .mobile-cta {
        display: none;
    }
}

/* ===== RESPONSIVE: 1024px+ ===== */
@media (min-width: 1024px) {
    .cards-grid--3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .assortment-grid {
        grid-template-columns: repeat(5, 1fr);
    }

    .hero__title {
        font-size: var(--font-size-4xl);
    }
}

/* ===== RESPONSIVE: 1440px+ ===== */
@media (min-width: 1440px) {
    :root {
        --container-max: 1280px;
    }

    .hero__title {
        font-size: var(--font-size-5xl);
    }
}

/* ===== REDUCED MOTION ===== */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

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

    .fade-in {
        opacity: 1;
        transform: none;
    }
}

/* ===== PRINT ===== */
@media print {
    .header,
    .mobile-cta,
    .footer__scroll-top {
        display: none;
    }
}