/* FURNACE Website Styles - Fire to Ice Aesthetic */
/* Google Sans Flex + Polished Mobile-First Design */

:root {
    /* Fire Colors */
    --fire-red: #FF3D00;
    --fire-orange: #FF6B00;
    --fire-yellow: #FFD600;

    /* Ice Colors */
    --ice-blue: #00D9FF;
    --ice-cyan: #00FFFF;
    --ice-white: #E0F7FF;

    /* Base */
    --black: #000000;
    --dark-gray: #0a0a0a;
    --mid-gray: #141414;
    --light-gray: #1e1e1e;
    --white: #ffffff;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Border radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Google Sans Flex', 'Barlow Condensed', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--black);
    color: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ======================== */
/* Navigation               */
/* ======================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.875rem var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-img {
    width: 36px;
    height: 36px;
    object-fit: contain;
    filter: drop-shadow(0 0 8px rgba(255, 61, 0, 0.4));
}

.logo-text {
    font-weight: 900;
    font-size: 1.35rem;
    letter-spacing: 0.08em;
    background: linear-gradient(135deg, var(--fire-orange) 0%, var(--ice-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: all 0.3s ease;
    position: relative;
}

.nav-links a:not(.cta-button)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--fire-orange), var(--ice-cyan));
    transition: width 0.3s ease;
    border-radius: 1px;
}

.nav-links a:not(.cta-button):hover::after {
    width: 100%;
}

.nav-links a:hover {
    color: var(--white);
}

.cta-button {
    background: linear-gradient(135deg, var(--fire-red) 0%, var(--fire-orange) 100%);
    padding: 0.5rem 1.25rem;
    border-radius: var(--radius-sm);
    color: var(--white) !important;
    font-weight: 600;
}

.cta-button:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(255, 61, 0, 0.35);
}

/* ======================== */
/* Hero Section             */
/* ======================== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem var(--spacing-md) var(--spacing-xl);
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 900px;
    height: 900px;
    background: radial-gradient(circle,
        rgba(255, 61, 0, 0.12) 0%,
        rgba(0, 217, 255, 0.04) 40%,
        transparent 70%
    );
    pointer-events: none;
    animation: pulse 5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: translate(-50%, -50%) scale(1); opacity: 0.4; }
    50% { transform: translate(-50%, -50%) scale(1.15); opacity: 0.6; }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 800px;
}

.hero-logo {
    width: 160px;
    height: 160px;
    object-fit: contain;
    margin-bottom: var(--spacing-md);
    filter: drop-shadow(0 0 50px rgba(255, 61, 0, 0.5));
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-16px); }
}

.hero-title {
    font-size: clamp(3rem, 9vw, 6.5rem);
    font-weight: 900;
    line-height: 0.95;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
}

.fire-text {
    display: block;
    background: linear-gradient(135deg, var(--fire-yellow) 0%, var(--fire-red) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fireGlow 3s ease-in-out infinite;
}

.ice-text {
    display: block;
    background: linear-gradient(135deg, var(--ice-cyan) 0%, var(--ice-blue) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: iceGlow 3s ease-in-out infinite;
}

@keyframes fireGlow {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.15); }
}

@keyframes iceGlow {
    0%, 100% { filter: brightness(1); }
    50% { filter: brightness(1.2); }
}

.hero-subtitle {
    font-size: clamp(1.05rem, 2vw, 1.3rem);
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-lg);
    line-height: 1.8;
    font-weight: 400;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.9rem 2rem;
    font-family: 'Google Sans Flex', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--fire-red) 0%, var(--fire-orange) 100%);
    color: var(--white);
    box-shadow: 0 8px 32px rgba(255, 61, 0, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(255, 61, 0, 0.45);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--white);
    border: 1.5px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.hero-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

/* ======================== */
/* Section Styles           */
/* ======================== */
.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    letter-spacing: -0.02em;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--fire-orange) 0%, var(--ice-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ======================== */
/* Problem Section          */
/* ======================== */
.problem {
    padding: var(--spacing-xl) 0;
    background: var(--dark-gray);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.problem-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.problem-headline {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--fire-orange);
    line-height: 1.3;
}

.problem-text p {
    font-size: 1.05rem;
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.65);
}

.problem-emphasis {
    font-size: 1.2rem !important;
    color: var(--white) !important;
    font-weight: 600;
    margin-top: 1.5rem !important;
}

.amnesia-demo {
    background: var(--mid-gray);
    padding: 1.75rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.session {
    margin-bottom: var(--spacing-sm);
}

.session:last-child {
    margin-bottom: 0;
}

.session-label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 0.5rem;
    color: rgba(255, 255, 255, 0.45);
    font-weight: 500;
}

.knowledge-bar {
    height: 28px;
    background: linear-gradient(90deg, var(--fire-orange) 0%, var(--fire-red) 100%);
    border-radius: var(--radius-sm);
    width: var(--width);
    transition: width 1s ease;
}

/* ======================== */
/* Solution Section         */
/* ======================== */
.solution {
    padding: var(--spacing-xl) 0;
}

.solution-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

.solution-card {
    background: var(--mid-gray);
    padding: 2rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.solution-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 107, 0, 0.3);
    box-shadow: 0 20px 50px rgba(255, 61, 0, 0.12);
    background: var(--light-gray);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.fire-icon {
    filter: drop-shadow(0 0 8px rgba(255, 61, 0, 0.4));
}

.ice-icon {
    filter: drop-shadow(0 0 8px rgba(0, 217, 255, 0.4));
}

.solution-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.solution-card p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ======================== */
/* Features Section         */
/* ======================== */
.features {
    padding: var(--spacing-xl) 0;
    background: var(--dark-gray);
}

.features-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    margin-bottom: var(--spacing-lg);
}

.feature-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 1rem 1.25rem;
    background: var(--mid-gray);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--fire-orange);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-item:hover {
    transform: translateX(6px);
    border-color: var(--ice-cyan);
    background: var(--light-gray);
}

.feature-icon {
    color: var(--fire-orange);
    font-size: 1.25rem;
    font-weight: 700;
}

.feature-text {
    font-size: 0.95rem;
    font-weight: 500;
}

.tech-stack {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.tech-stack h3 {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    color: var(--ice-cyan);
    font-weight: 600;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
}

.tech-tag {
    padding: 0.5rem 1.25rem;
    background: var(--mid-gray);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 100px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.tech-tag:hover {
    background: rgba(255, 107, 0, 0.15);
    border-color: var(--fire-orange);
    color: var(--fire-orange);
    transform: scale(1.05);
}

/* ======================== */
/* Blog Section             */
/* ======================== */
.blog {
    padding: var(--spacing-xl) 0;
}

.blog-grid {
    display: grid;
    gap: 1.25rem;
}

.blog-post {
    background: var(--mid-gray);
    padding: 1.75rem;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.blog-post:hover {
    border-color: rgba(0, 217, 255, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.blog-post h3 {
    font-size: 1.35rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.blog-post h3 a {
    color: var(--white);
    text-decoration: none;
    transition: color 0.3s ease;
}

.blog-post h3 a:hover {
    color: var(--fire-orange);
}

.blog-meta {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.blog-excerpt {
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--spacing-sm);
    line-height: 1.7;
    font-size: 0.95rem;
}

.read-more {
    color: var(--ice-cyan);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all 0.3s ease;
}

.read-more:hover {
    gap: 0.8rem;
    color: var(--ice-white);
}

.blog-loading {
    text-align: center;
    padding: var(--spacing-lg);
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.95rem;
}

/* ======================== */
/* Download Section         */
/* ======================== */
.download {
    position: relative;
    padding: var(--spacing-xl) 0;
    background: var(--dark-gray);
    text-align: center;
    overflow: hidden;
}

.download-glow {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(0, 217, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

.download-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
}

.download-options {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.9rem 1.75rem;
    background: var(--mid-gray);
    color: var(--white);
    text-decoration: none;
    border: 1.5px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.download-btn:hover {
    background: rgba(0, 217, 255, 0.1);
    border-color: var(--ice-cyan);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.15);
    color: var(--ice-cyan);
}

.install-command {
    margin-top: var(--spacing-md);
    position: relative;
}

.install-command code {
    background: var(--mid-gray);
    padding: 0.9rem 2rem;
    border-radius: var(--radius-md);
    font-family: 'Google Sans Mono', 'JetBrains Mono', monospace;
    font-size: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    display: inline-block;
    color: var(--ice-cyan);
    letter-spacing: 0.02em;
}

/* ======================== */
/* Footer                   */
/* ======================== */
.footer {
    padding: var(--spacing-lg) 0 var(--spacing-md);
    background: var(--black);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-logo img {
    width: 28px;
    height: 28px;
    object-fit: contain;
}

.footer-logo span {
    font-weight: 900;
    font-size: 1.1rem;
    letter-spacing: 0.08em;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    color: rgba(255, 255, 255, 0.35);
    font-size: 0.85rem;
}

/* ======================== */
/* Responsive - Tablet      */
/* ======================== */
@media (max-width: 960px) {
    .problem-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

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

/* ======================== */
/* Responsive - Mobile      */
/* ======================== */
@media (max-width: 640px) {
    :root {
        --spacing-xl: 4rem;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.97);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        z-index: 999;
    }

    .nav-links.open {
        display: flex;
    }

    .nav-links a {
        font-size: 1.25rem;
        color: rgba(255, 255, 255, 0.8);
    }

    .nav-links a:not(.cta-button)::after {
        display: none;
    }

    .cta-button {
        padding: 0.75rem 2rem;
        font-size: 1.1rem;
    }

    .hero {
        padding: 7rem var(--spacing-sm) var(--spacing-lg);
        min-height: 90vh;
    }

    .hero-logo {
        width: 120px;
        height: 120px;
    }

    .hero-title {
        font-size: clamp(2.5rem, 12vw, 4rem);
    }

    .hero-subtitle {
        font-size: 1rem;
        padding: 0 0.5rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
        gap: 0.75rem;
    }

    .btn-primary, .btn-secondary {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        padding: 0.85rem 1.5rem;
    }

    .container {
        padding: 0 1.25rem;
    }

    .section-title {
        font-size: clamp(1.75rem, 7vw, 2.5rem);
        margin-bottom: var(--spacing-md);
    }

    .problem-headline {
        font-size: 1.4rem;
    }

    .problem-text p {
        font-size: 1rem;
    }

    .amnesia-demo {
        padding: 1.25rem;
    }

    .solution-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .solution-card {
        padding: 1.5rem;
    }

    .solution-card h3 {
        font-size: 1.15rem;
    }

    .features-list {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .feature-item {
        padding: 0.875rem 1rem;
    }

    .tech-tags {
        gap: 0.5rem;
    }

    .tech-tag {
        padding: 0.4rem 1rem;
        font-size: 0.8rem;
    }

    .blog-post {
        padding: 1.25rem;
    }

    .blog-post h3 {
        font-size: 1.15rem;
    }

    .download-options {
        flex-direction: column;
        align-items: center;
    }

    .download-btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }

    .install-command code {
        font-size: 0.875rem;
        padding: 0.75rem 1.25rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 1.25rem;
        text-align: center;
    }

    .footer-links {
        gap: 1.5rem;
    }
}

/* ======================== */
/* Small phones             */
/* ======================== */
@media (max-width: 380px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .hero-logo {
        width: 100px;
        height: 100px;
    }

    .container {
        padding: 0 1rem;
    }
}