/* ==============================================================
   M501 WEB STUDIO - AI-Powered Web Studio
   Responsive stylesheet
   ============================================================== */

:root {
    --clr-primary: #8a2be2;
    --clr-primary-dark: #5c0099;
    --clr-bg: #0c0c0c;
    --clr-bg-dark: #050505;
    --clr-surface: #151515;
    --clr-text: #e8e3ec;
    --clr-muted: #c9bdcf;
    --clr-accent: #ffeb3b;
    --hero-text: #ffffff;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.22);
    --shadow-primary: 0 14px 34px rgba(138, 43, 226, 0.24);
    --radius: 8px;
    --transition: 220ms ease;
}

.light-mode {
    --clr-bg: #ffffff;
    --clr-bg-dark: #f6f4f8;
    --clr-surface: #ffffff;
    --clr-text: #3a193f;
    --clr-muted: #60496a;
    --hero-text: #ffffff;
    --shadow-soft: 0 10px 30px rgba(39, 21, 45, 0.12);
    --shadow-primary: 0 14px 34px rgba(138, 43, 226, 0.18);
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

* {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 8rem;
}

body {
    min-width: 0;
    overflow-x: hidden;
    font-family: "Montserrat", sans-serif;
    line-height: 1.6;
    color: var(--clr-text);
    background-color: var(--clr-bg);
    transition: color var(--transition), background-color var(--transition);
}

img,
picture {
    display: block;
    max-width: 100%;
}

a {
    color: inherit;
}

button,
input,
textarea {
    font: inherit;
}

button {
    border: 0;
}

.container {
    width: min(100% - 2rem, 1200px);
    margin-inline: auto;
}

.section {
    padding-block: clamp(3.5rem, 8vw, 6rem);
}

.section-title {
    position: relative;
    margin-bottom: clamp(1.75rem, 4vw, 2.75rem);
    text-align: center;
    font-size: clamp(2rem, 7vw, 2.8rem);
    line-height: 1.15;
    text-wrap: balance;
}

.section-title::after {
    content: "";
    display: block;
    width: 4rem;
    height: 4px;
    margin: 0.7rem auto 0;
    border-radius: 999px;
    background-color: var(--clr-primary);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.8rem;
    padding: 0.8rem 1.4rem;
    border-radius: var(--radius);
    background-color: var(--clr-primary);
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0;
    line-height: 1.2;
    text-align: center;
    text-decoration: none;
    text-transform: uppercase;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.btn:hover,
.btn:focus-visible {
    background-color: var(--clr-primary-dark);
    box-shadow: var(--shadow-primary);
    transform: translateY(-2px);
}

.btn:focus-visible,
.theme-toggle:focus-visible,
.chat-widget:focus-visible,
.chat-input button:focus-visible,
.chat-header button:focus-visible,
.quick-reply:focus-visible,
nav a:focus-visible {
    outline: 3px solid rgba(255, 235, 59, 0.85);
    outline-offset: 3px;
}

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    padding-block: 0.85rem;
    background-color: rgba(12, 12, 12, 0.94);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
    transition: background-color var(--transition), box-shadow var(--transition);
}

.light-mode header {
    background-color: rgba(255, 255, 255, 0.94);
    box-shadow: 0 1px 0 rgba(58, 25, 63, 0.12);
}

.header-container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.75rem 1rem;
}

.logo {
    display: flex;
    min-width: 0;
    align-items: center;
    gap: 0.55rem;
    color: var(--clr-text);
    font-size: clamp(1rem, 4.5vw, 1.2rem);
    font-weight: 700;
    line-height: 1.1;
}

.logo-img {
    width: clamp(38px, 12vw, 52px);
    height: auto;
    flex: 0 0 auto;
}

.logo span {
    color: var(--clr-accent);
}

nav {
    order: 3;
    width: 100%;
    min-width: 0;
}

nav ul {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.35rem 0.75rem;
    list-style: none;
}

nav a {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 2rem;
    padding: 0.2rem 0.05rem;
    color: var(--clr-text);
    font-size: clamp(0.78rem, 2.7vw, 0.95rem);
    font-weight: 700;
    line-height: 1.2;
    text-decoration: none;
    transition: color var(--transition);
}

nav a::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    height: 2px;
    border-radius: 999px;
    background-color: var(--clr-primary);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform var(--transition);
}

nav a:hover::after,
nav a:focus-visible::after {
    transform: scaleX(1);
}

.theme-toggle {
    display: inline-flex;
    width: 2.35rem;
    height: 2.35rem;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--clr-primary);
    color: #ffffff;
    cursor: pointer;
    transition: transform var(--transition), background-color var(--transition);
}

.theme-toggle:hover {
    background-color: var(--clr-primary-dark);
    transform: rotate(18deg);
}

/* Hero */
.hero {
    position: relative;
    display: grid;
    min-height: calc(100svh - 7rem);
    place-items: center;
    padding-block: clamp(4rem, 10vw, 7rem);
    color: var(--hero-text);
    text-align: center;
    background:
        linear-gradient(135deg, rgba(39, 9, 64, 0.78), rgba(138, 43, 226, 0.68)),
        url("assets/hero.png") center / cover no-repeat;
}

.hero-content {
    position: relative;
    z-index: 1;
    width: min(100%, 820px);
}

.hero h1 {
    margin-bottom: 1rem;
    font-size: clamp(2.15rem, 11vw, 4.4rem);
    line-height: 1.08;
    text-wrap: balance;
}

.hero p {
    width: min(100%, 720px);
    margin: 0 auto 2rem;
    color: rgba(255, 255, 255, 0.9);
    font-size: clamp(1rem, 4vw, 1.2rem);
}

.highlight {
    color: var(--clr-accent);
}

/* About */
.about,
.portfolio,
.contact,
footer {
    background-color: var(--clr-bg-dark);
}

.about .row {
    display: grid;
    grid-template-columns: 1fr;
    gap: clamp(2rem, 5vw, 4rem);
    align-items: center;
}

.about .col-text,
.about .col-img {
    min-width: 0;
}

.about .col-text {
    max-width: 70ch;
    margin-inline: auto;
}

.about-img {
    width: min(100%, 430px);
    margin-inline: auto;
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
}

/* Cards and grids */
.grid,
.services .grid,
.benefits .grid,
.portfolio .grid,
.testimonials .grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
    gap: clamp(1rem, 3vw, 1.5rem);
}

.service-card,
.benefit-card,
.testimonial {
    min-width: 0;
    border-radius: var(--radius);
    background-color: var(--clr-bg-dark);
    box-shadow: var(--shadow-soft);
}

.services .service-card,
.benefit-card,
.testimonial {
    padding: clamp(1.35rem, 5vw, 2rem);
    text-align: center;
}

.service-card {
    transition: transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
    box-shadow: var(--shadow-primary);
    transform: translateY(-6px);
}

.service-card i,
.benefit-card i {
    margin-bottom: 1rem;
    color: var(--clr-primary);
}

.service-card i {
    font-size: clamp(2.35rem, 8vw, 3rem);
}

.benefit-card i {
    font-size: clamp(2rem, 7vw, 2.45rem);
}

.service-card h3,
.benefit-card h3 {
    margin-bottom: 0.75rem;
    font-size: clamp(1.12rem, 4vw, 1.3rem);
    line-height: 1.25;
    text-wrap: balance;
}

.service-card p,
.benefit-card p,
.testimonial p,
.contact-description,
footer p {
    overflow-wrap: break-word;
}

/* Portfolio */
.portfolio-item {
    position: relative;
    min-width: 0;
    overflow: hidden;
    border-radius: var(--radius);
    aspect-ratio: 4 / 3;
    box-shadow: var(--shadow-soft);
}

.portfolio-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 420ms ease;
}

.portfolio-item:hover .portfolio-img {
    transform: scale(1.06);
}

.portfolio-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    gap: 0.25rem;
    padding: clamp(1rem, 4vw, 1.5rem);
    color: #ffffff;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.82), rgba(0, 0, 0, 0.12) 72%);
    opacity: 1;
    transition: opacity var(--transition);
}

.portfolio-overlay h3 {
    font-size: clamp(1.05rem, 4vw, 1.25rem);
    line-height: 1.2;
    text-wrap: balance;
}

/* Testimonials */
.testimonial-img {
    width: 80px;
    height: 80px;
    margin: 0 auto 1rem;
    border: 3px solid var(--clr-primary);
    border-radius: 50%;
    object-fit: cover;
}

.testimonial p {
    margin-bottom: 1rem;
    font-style: italic;
}

.testimonial h4 {
    color: var(--clr-primary);
    font-size: 1rem;
    line-height: 1.35;
}

/* Contact */
.contact form {
    display: grid;
    width: min(100%, 640px);
    margin-inline: auto;
    gap: 1rem;
}

.contact-description {
    width: min(100%, 660px);
    margin: 0 auto 2rem;
    color: var(--clr-muted);
    text-align: center;
}

.contact input,
.contact textarea {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    padding: 0.85rem 1rem;
    background-color: var(--clr-bg);
    color: var(--clr-text);
    transition: border-color var(--transition), box-shadow var(--transition), background-color var(--transition);
}

.light-mode .contact input,
.light-mode .contact textarea {
    border-color: rgba(58, 25, 63, 0.18);
}

.contact textarea {
    min-height: 9rem;
    resize: vertical;
}

.contact input:focus,
.contact textarea:focus {
    outline: none;
    border-color: var(--clr-primary);
    box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.28);
}

.contact button {
    width: 100%;
    margin-top: 0.5rem;
}

/* Footer */
footer {
    padding-block: clamp(2.5rem, 7vw, 3.5rem);
    text-align: center;
    font-size: 0.95rem;
}

footer .logo {
    justify-content: center;
    margin-bottom: 1rem;
}

footer .logo-img {
    width: clamp(54px, 18vw, 74px);
}

footer .social {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

footer .social a {
    display: inline-flex;
    width: 2.65rem;
    height: 2.65rem;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    color: var(--clr-primary);
    font-size: 1.35rem;
    text-decoration: none;
    transition: transform var(--transition), color var(--transition), background-color var(--transition);
}

footer .social a:hover,
footer .social a:focus-visible {
    background-color: rgba(138, 43, 226, 0.12);
    color: var(--clr-accent);
    transform: translateY(-3px);
}

/* Chat widget */
.chat-widget {
    position: fixed;
    right: 1rem;
    bottom: 1rem;
    z-index: 1100;
    display: flex;
    width: 3.5rem;
    height: 3.5rem;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--clr-primary);
    box-shadow: var(--shadow-primary);
    color: #ffffff;
    cursor: pointer;
    transition: transform var(--transition), background-color var(--transition);
}

.chat-widget:hover {
    background-color: var(--clr-primary-dark);
    transform: scale(1.05);
}

.chat-container {
    position: fixed;
    right: 0.75rem;
    bottom: 5rem;
    z-index: 1101;
    display: none;
    width: min(350px, calc(100vw - 1.5rem));
    height: min(450px, calc(100svh - 6rem));
    overflow: hidden;
    border-radius: var(--radius);
    background-color: var(--clr-surface);
    box-shadow: 0 16px 44px rgba(0, 0, 0, 0.32);
    color: var(--clr-text);
    flex-direction: column;
}

.chat-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.95rem 1rem;
    background-color: var(--clr-primary);
    color: #ffffff;
}

.chat-header h3 {
    font-size: 1rem;
    line-height: 1.2;
}

.chat-header button {
    display: inline-flex;
    width: 2rem;
    height: 2rem;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: transparent;
    color: #ffffff;
    cursor: pointer;
}

.chat-messages {
    display: flex;
    min-height: 0;
    flex: 1;
    flex-direction: column;
    gap: 0.6rem;
    overflow-y: auto;
    padding: 1rem;
}

.message {
    max-width: min(82%, 18rem);
    border-radius: var(--radius);
    padding: 0.75rem 0.85rem;
    overflow-wrap: break-word;
    white-space: pre-line;
}

.message.bot {
    align-self: flex-start;
    background-color: #bc58c7;
    color: #ffffff;
}

.light-mode .message.bot {
    background-color: #ead5ee;
    color: #3a193f;
}

.message.user {
    align-self: flex-end;
    background-color: var(--clr-primary);
    color: #ffffff;
}

.quick-replies {
    display: flex;
    max-width: 100%;
    flex-wrap: wrap;
    gap: 0.5rem;
    align-self: flex-start;
}

.quick-reply {
    min-height: 2.15rem;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: 999px;
    padding: 0.45rem 0.8rem;
    background-color: rgba(138, 43, 226, 0.16);
    color: var(--clr-text);
    font-size: 0.82rem;
    font-weight: 700;
    line-height: 1.2;
    cursor: pointer;
    transition: border-color var(--transition), background-color var(--transition), color var(--transition);
}

.quick-reply:hover {
    border-color: var(--clr-primary);
    background-color: var(--clr-primary);
    color: #ffffff;
}

.light-mode .quick-reply {
    border-color: rgba(58, 25, 63, 0.18);
    background-color: rgba(138, 43, 226, 0.1);
    color: var(--clr-text);
}

.chat-input {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.light-mode .chat-input {
    border-top-color: rgba(58, 25, 63, 0.14);
}

.chat-input input {
    min-width: 0;
    flex: 1;
    border: 0;
    border-radius: 999px;
    padding: 0.65rem 0.9rem;
    background-color: rgba(255, 255, 255, 0.92);
    color: #151515;
}

.light-mode .chat-input input {
    background-color: #ffffff;
    color: #2d1633;
}

.chat-input input:focus {
    outline: 3px solid rgba(138, 43, 226, 0.25);
}

.chat-input input:disabled {
    cursor: wait;
    opacity: 0.72;
}

.chat-input button {
    display: inline-flex;
    width: 2.5rem;
    height: 2.5rem;
    flex: 0 0 auto;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background-color: var(--clr-primary);
    color: #ffffff;
    cursor: pointer;
}

.chat-input button:disabled {
    cursor: wait;
    opacity: 0.65;
}

/* Tablet and desktop refinements */
@media (min-width: 640px) {
    .container {
        width: min(100% - 3rem, 1200px);
    }

    .contact button {
        width: fit-content;
        justify-self: start;
    }

    .portfolio-overlay {
        opacity: 0;
    }

    .portfolio-item:hover .portfolio-overlay,
    .portfolio-item:focus-within .portfolio-overlay {
        opacity: 1;
    }
}

@media (min-width: 780px) {
    html {
        scroll-padding-top: 6rem;
    }

    header {
        padding-block: 0.9rem;
    }

    .header-container {
        flex-wrap: nowrap;
        justify-content: space-between;
    }

    nav {
        order: initial;
        width: auto;
        flex: 0 1 auto;
    }

    nav ul {
        gap: clamp(0.9rem, 2vw, 2rem);
        justify-content: flex-end;
    }

    .hero {
        min-height: calc(100svh - 5rem);
    }

    .about .row {
        grid-template-columns: minmax(0, 1.05fr) minmax(260px, 0.95fr);
    }

    .about .col-text {
        margin-inline: 0;
    }
}

@media (min-width: 1024px) {
    .services .grid,
    .testimonials .grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .portfolio .grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .benefits .grid {
        grid-template-columns: repeat(4, minmax(0, 1fr)) !important;
    }
}

@media (max-width: 380px) {
    .container {
        width: min(100% - 1.25rem, 1200px);
    }

    .header-container {
        gap: 0.6rem;
    }

    nav ul {
        gap: 0.25rem 0.55rem;
    }

    .btn {
        width: 100%;
        max-width: 18rem;
    }

    .hero {
        min-height: calc(100svh - 7.5rem);
    }

    .chat-container {
        right: 0.5rem;
        bottom: 4.75rem;
        width: calc(100vw - 1rem);
        height: min(430px, calc(100svh - 5.5rem));
    }
}

@media (hover: none) {
    .btn:hover,
    .service-card:hover,
    .portfolio-item:hover .portfolio-img,
    .theme-toggle:hover,
    .chat-widget:hover,
    footer .social a:hover {
        transform: none;
    }

    .portfolio-overlay {
        opacity: 1;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
        animation-duration: 1ms !important;
        animation-iteration-count: 1 !important;
    }
}