/* ===================================
   Devalon — Main Styles
   =================================== */

/* CSS Variables */
:root {
    --bg: #0F1012;
    --bg-card: #18181B;
    --text: #F5F5F7;
    --text-dim: #8E8E93;
    --accent: #00A9FF;
    --accent-dark: #0071E3;
    --border: rgba(255, 255, 255, 0.08);

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --container: 1168px;
    --gap: 24px;
    --radius: 12px;
    --radius-lg: 16px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    font-size: 16px;
    line-height: 1.5;
    font-weight: 400;
    color: var(--text);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: 48px;
}

h2 {
    font-size: 32px;
}

h3 {
    font-size: 24px;
}

/* Container */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 var(--gap);
}

/* Section Title */
.section-title {
    margin-bottom: 48px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 24px;
    font-family: var(--font);
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--radius);
    border: none;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

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

.btn--primary:hover {
    background-color: var(--accent-dark);
}

.btn--outline {
    background-color: transparent;
    color: var(--accent);
    border: 1px solid var(--accent);
}

.btn--outline:hover {
    background-color: var(--accent);
    color: var(--bg);
}

.btn--sm {
    height: 40px;
    padding: 0 16px;
    font-size: 14px;
}

.btn--lg {
    height: 56px;
    padding: 0 32px;
    font-size: 16px;
}

.btn__icon {
    margin-right: 8px;
    flex-shrink: 0;
}

/* ===================================
   Header
   =================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    z-index: 100;
    background-color: rgba(15, 16, 18, 0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    position: relative;
    display: flex;
    align-items: center;
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.02em;
    transition: all 0.2s ease;
    padding: 8px 16px;
    margin: -8px -16px;
}

.logo__waves {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 40px;
    opacity: 0.4;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.logo__waves svg {
    width: 100%;
    height: 100%;
}

.logo:hover .logo__waves {
    opacity: 0.7;
}

.logo__text {
    position: relative;
    z-index: 1;
    transition: all 0.2s ease;
}

/* Wave animations */
.wave {
    animation: wavePulse 3s ease-in-out infinite;
}

.wave--1 { animation-delay: 0s; }
.wave--2 { animation-delay: 0.5s; }
.wave--3 { animation-delay: 0.25s; }
.wave--4 { animation-delay: 0.75s; }

@keyframes wavePulse {
    0%, 100% {
        opacity: 0.6;
        stroke-width: 2;
    }
    50% {
        opacity: 1;
        stroke-width: 2.5;
    }
}

.header--scrolled .logo__text {
    font-size: 18px;
}

.header--scrolled .logo__waves {
    width: 100px;
    height: 32px;
}

/* ===================================
   Hero
   =================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 0 80px;
}

.hero__inner {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero__title {
    margin-bottom: 24px;
}

.hero__subtitle {
    font-size: 20px;
    color: var(--text-dim);
    margin-bottom: 40px;
}

.hero__note {
    margin-top: 16px;
    font-size: 14px;
    color: var(--text-dim);
}

/* Hero Decorative Elements */
.hero {
    position: relative;
    overflow: hidden;
}

.hero__decor {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
}

.hero__inner {
    position: relative;
    z-index: 1;
}

.hero__circle {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--accent);
    opacity: 0.1;
}

.hero__circle--1 {
    width: 600px;
    height: 600px;
    top: -200px;
    right: -200px;
    animation: float 20s ease-in-out infinite;
}

.hero__circle--2 {
    width: 400px;
    height: 400px;
    bottom: -100px;
    left: -100px;
    animation: float 15s ease-in-out infinite reverse;
}

.hero__circle--3 {
    width: 200px;
    height: 200px;
    top: 50%;
    left: 10%;
    animation: float 25s ease-in-out infinite;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    25% {
        transform: translate(20px, -20px) rotate(5deg);
    }
    50% {
        transform: translate(-10px, 10px) rotate(-5deg);
    }
    75% {
        transform: translate(15px, 5px) rotate(3deg);
    }
}

/* ===================================
   Stats
   =================================== */
.stats {
    padding: 60px 0;
    border-bottom: 1px solid var(--border);
}

.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
    text-align: center;
}

.stats__item {
    padding: 20px;
}

.stats__number {
    display: block;
    font-size: 48px;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: -0.02em;
    line-height: 1;
    margin-bottom: 8px;
}

.stats__label {
    font-size: 14px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===================================
   Services
   =================================== */
.services {
    padding: 100px 0;
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
}

.service-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.service-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 169, 255, 0.12);
}

.service-card__icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--accent);
}

.service-card__title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.service-card__desc {
    font-size: 16px;
    color: var(--text-dim);
    line-height: 1.5;
}

/* ===================================
   Cases
   =================================== */
.cases {
    padding: 100px 0;
    background-color: var(--bg-card);
}

.cases__slider {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
}

.case-card {
    background-color: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    flex-direction: column;
    min-height: 280px;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.case-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 169, 255, 0.12);
}

.case-card__logo {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text);
}

.case-card__task {
    font-size: 16px;
    color: var(--text);
    margin-bottom: 12px;
}

.case-card__solution {
    font-size: 14px;
    color: var(--text-dim);
    flex-grow: 1;
}

.case-card__footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.case-card__result {
    font-size: 16px;
    font-weight: 600;
    color: var(--accent);
}

.case-card__budget {
    font-size: 14px;
    color: var(--text-dim);
}

/* ===================================
   Formats
   =================================== */
.formats {
    padding: 100px 0;
}

.formats__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gap);
}

.format-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.format-card__label {
    font-size: 12px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

.format-card__title {
    font-size: 20px;
    font-weight: 600;
}

.format-card__desc {
    font-size: 16px;
    color: var(--text);
    line-height: 1.5;
}

.format-card__list {
    margin-top: 4px;
    padding-left: 18px;
    display: grid;
    gap: 6px;
}

.format-card__list li {
    position: relative;
    color: var(--text-dim);
    font-size: 15px;
}

.format-card__list li::before {
    content: '•';
    position: absolute;
    left: -14px;
    color: var(--accent);
}

/* ===================================
   About
   =================================== */
.about {
    padding: 100px 0;
    background-color: var(--bg-card);
}

.about__inner {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 80px;
    align-items: center;
}

.about__content .section-title {
    margin-bottom: 24px;
}

.about__text {
    font-size: 18px;
    color: var(--text-dim);
    margin-bottom: 16px;
    line-height: 1.6;
}

.about__text:first-of-type {
    color: var(--text);
    font-size: 20px;
}

.about__list {
    margin-top: 24px;
}

.about__list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    font-size: 16px;
    color: var(--text-dim);
}

.about__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background-color: var(--accent);
    border-radius: 50%;
}

.about__visual {
    display: flex;
    justify-content: center;
}

.about__avatar {
    width: 200px;
    height: 200px;
}

.about__avatar img {
    width: 100%;
    height: 100%;
    border-radius: 24px;
    object-fit: cover;
}

/* ===================================
   CTA
   =================================== */
.cta {
    padding: 100px 0;
}

.cta__inner {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.cta__title {
    font-size: 32px;
    margin-bottom: 16px;
}

.cta__text {
    font-size: 18px;
    color: var(--text-dim);
    margin-bottom: 32px;
}

/* ===================================
   Footer
   =================================== */
.footer {
    height: 64px;
    border-top: 1px solid var(--border);
}

.footer__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.footer__copy {
    font-size: 14px;
    color: var(--text-dim);
}

/* ===================================
   Animations
   =================================== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.4s ease-out, transform 0.4s ease-out;
}

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

/* ===================================
   Responsive
   =================================== */

/* Tablet */
@media (max-width: 1024px) {
    h1 {
        font-size: 40px;
    }

    h2 {
        font-size: 28px;
    }

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

    .stats__number {
        font-size: 40px;
    }

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

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

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

    .about__inner {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about__visual {
        order: -1;
    }
}

/* Mobile */
@media (max-width: 768px) {
    :root {
        --gap: 16px;
    }

    h1 {
        font-size: 32px;
    }

    h2 {
        font-size: 24px;
    }

    .hero {
        min-height: auto;
        padding: 120px 0 60px;
    }

    .hero__subtitle {
        font-size: 16px;
    }

    .stats {
        padding: 40px 0;
    }

    .stats__grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .stats__number {
        font-size: 32px;
    }

    .stats__label {
        font-size: 12px;
    }

    .services,
    .cases,
    .formats,
    .about,
    .cta {
        padding: 60px 0;
    }

    .section-title {
        margin-bottom: 32px;
    }

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

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

    .cases__slider {
        grid-template-columns: 1fr;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        gap: var(--gap);
        -webkit-overflow-scrolling: touch;
    }

    .case-card {
        scroll-snap-align: start;
        min-width: 100%;
    }

    .about__avatar {
        width: 150px;
        height: 150px;
    }

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

/* Small mobile */
@media (max-width: 375px) {
    h1 {
        font-size: 28px;
    }

    .hero__subtitle {
        font-size: 14px;
    }
}