/* ------------------- */
/* ROOT & VARIABLES    */
/* ------------------- */
:root {
    /* Color Palette (Dark Theme Default) */
    --color-bg: #0a192f;
    --color-bg-secondary: #112240;
    --color-text: #ccd6f6;
    --color-text-secondary: #8892b0;
    --color-heading: #e6f1ff;
    --color-primary: #64ffda; /* Cyan */
    --color-secondary: #ffc107; /* Amber */
    --color-border: #233554;
    --color-shadow: rgba(2, 12, 27, 0.7);

    /* Fonts */
    --font-primary: 'Inter', sans-serif;

    /* Spacing & Layout */
    --container-width: 1100px;
    --section-padding: 100px 0;
    --header-height: 80px;

    /* Transitions */
    --transition-speed: 0.3s;
}

[data-theme="light"] {
    --color-bg: #f5f7fa;
    --color-bg-secondary: #ffffff;
    --color-text: #4a5568;
    --color-text-secondary: #718096;
    --color-heading: #1a202c;
    --color-primary: #007bff; /* Blue */
    --color-secondary: #fd7e14; /* Orange */
    --color-border: #e2e8f0;
    --color-shadow: rgba(0, 0, 0, 0.1);
}


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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--header-height);
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    transition: background-color var(--transition-speed) ease, color var(--transition-speed) ease;
}

.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

a:hover {
    color: var(--color-secondary);
}

h1, h2, h3, h4 {
    color: var(--color-heading);
    line-height: 1.2;
    font-weight: 700;
}


/* ------------------- */
/* HEADER & NAVIGATION */
/* ------------------- */
#main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    z-index: 1000;
    background-color: transparent;
    transition: background-color var(--transition-speed) ease, box-shadow var(--transition-speed) ease, height var(--transition-speed) ease;
}

#main-header.sticky {
    background-color: var(--color-bg-secondary);
    box-shadow: 0 2px 10px var(--color-shadow);
    height: 70px;
}

#main-header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-heading);
}

.logo svg {
    margin-right: 10px;
    color: var(--color-primary);
    transition: transform var(--transition-speed) ease;
}

.logo:hover svg {
    transform: rotate(15deg);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-links a {
    color: var(--color-text);
    font-size: 0.9rem;
    padding: 5px 0;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: width var(--transition-speed) ease;
}

.nav-links a:hover::after, .nav-links a.active::after {
    width: 100%;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

#theme-toggle {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    cursor: pointer;
    width: 24px;
    height: 24px;
    transition: color var(--transition-speed) ease;
}
#theme-toggle:hover {
    color: var(--color-primary);
}
.sun-icon { display: none; }
.moon-icon { display: block; }
[data-theme="light"] .sun-icon { display: block; }
[data-theme="light"] .moon-icon { display: none; }


#mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-heading);
    cursor: pointer;
    width: 30px;
    height: 30px;
}


/* ------------------- */
/* BUTTONS             */
/* ------------------- */
.button {
    display: inline-block;
    padding: 14px 28px;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
    border: 2px solid transparent;
}

.button-primary {
    background-color: var(--color-primary);
    color: var(--color-bg);
    border-color: var(--color-primary);
}

.button-primary:hover {
    background-color: transparent;
    color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(100, 255, 218, 0.1);
}

[data-theme="light"] .button-primary {
     color: #fff;
}
[data-theme="light"] .button-primary:hover {
     color: var(--color-primary);
}

.button-secondary {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.button-secondary:hover {
    background-color: var(--color-primary);
    color: var(--color-bg);
    transform: translateY(-3px);
}
[data-theme="light"] .button-secondary:hover {
    color: #fff;
}

/* ------------------- */
/* SECTIONS & SHARED   */
/* ------------------- */
section {
    padding: var(--section-padding);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 15px;
    position: relative;
    display: inline-block;
}
.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: var(--color-primary);
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* ------------------- */
/* HERO SECTION        */
/* ------------------- */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    text-align: left;
    position: relative;
    overflow: hidden;
}
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 15% 25%, var(--color-primary), transparent 25%),
        radial-gradient(circle at 85% 75%, var(--color-secondary), transparent 25%);
    opacity: 0.1;
    filter: blur(80px);
}
.hero-section .container {
    position: relative;
    z-index: 2;
}

.hero-headline {
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    font-weight: 800;
    margin-bottom: 20px;
}
.hero-subheadline {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--color-text-secondary);
    max-width: 600px;
    margin-bottom: 40px;
}


/* ------------------- */
/* SERVICES SECTION    */
/* ------------------- */
.services-section {
    background-color: var(--color-bg-secondary);
}
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.service-card {
    background-color: var(--color-bg);
    padding: 40px 30px;
    border-radius: 6px;
    border: 1px solid var(--color-border);
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    text-align: left;
}
.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px -15px var(--color-shadow);
}
.service-icon {
    color: var(--color-primary);
    margin-bottom: 20px;
}
.service-icon svg {
    width: 40px;
    height: 40px;
}
.service-title {
    font-size: 1.3rem;
    margin-bottom: 15px;
}
.service-description {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ------------------- */
/* ABOUT SECTION       */
/* ------------------- */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-description {
    margin-bottom: 30px;
    font-size: 1.1rem;
}
.founder-info {
    margin-top: 30px;
    padding-left: 20px;
    border-left: 3px solid var(--color-primary);
}
.founder-info h4 {
    color: var(--color-heading);
    font-size: 1.1rem;
}
.founder-info p {
    color: var(--color-text-secondary);
}
.about-values {
    background-color: var(--color-bg-secondary);
    padding: 30px;
    border-radius: 6px;
    border: 1px solid var(--color-border);
}
.values-title {
    font-size: 1.4rem;
    margin-bottom: 20px;
}
.about-values ul {
    list-style: none;
    padding-left: 0;
}
.about-values li {
    padding-left: 25px;
    position: relative;
    margin-bottom: 15px;
    font-size: 0.95rem;
    color: var(--color-text-secondary);
}
.about-values li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

/* ----------------------- */
/* CASE STUDY/DOWNLOAD     */
/* ----------------------- */
.case-study-section {
    background-color: var(--color-bg-secondary);
}
.download-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}
.pdf-preview {
    display: flex;
    align-items: center;
    gap: 20px;
    color: var(--color-heading);
    transition: transform var(--transition-speed) ease;
}
.download-container:hover .pdf-preview {
    transform: scale(1.05);
}
.pdf-preview svg {
    width: 60px;
    height: 60px;
    color: var(--color-primary);
}
.pdf-preview span {
    font-weight: 500;
}
.download-buttons {
    display: flex;
    gap: 15px;
    flex-shrink: 0;
}


/* ------------------- */
/* CONTACT SECTION     */
/* ------------------- */
.contact-section {
    text-align: center;
}
.contact-section .section-title {
    font-size: 2rem;
}
.contact-text {
    max-width: 500px;
    margin: 0 auto 30px auto;
    color: var(--color-text-secondary);
    font-size: 1.1rem;
}

/* ------------------- */
/* FOOTER              */
/* ------------------- */
.site-footer {
    background-color: var(--color-bg-secondary);
    padding: 60px 0;
    border-top: 1px solid var(--color-border);
    font-size: 0.9rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}
.footer-about .logo {
    margin-bottom: 15px;
}
.footer-about p {
    color: var(--color-text-secondary);
}
.footer-links h4, .footer-social h4 {
    color: var(--color-heading);
    margin-bottom: 15px;
    font-size: 1rem;
}
.footer-links ul {
    list-style: none;
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    color: var(--color-text-secondary);
}
.footer-links a:hover {
    color: var(--color-primary);
    padding-left: 5px;
}
.social-icons {
    display: flex;
    gap: 15px;
}
.social-icons a {
    color: var(--color-text-secondary);
}
.social-icons a:hover {
    color: var(--color-primary);
    transform: translateY(-3px);
}

/* ------------------- */
/* SCROLL ANIMATIONS   */
/* ------------------- */
.animated-item {
    opacity: 0;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.animated-item[data-animation="fade-in"] {
    transform: translateY(20px);
}
.animated-item[data-animation="fade-in-up"] {
    transform: translateY(50px);
}
.animated-item[data-animation="zoom-in"] {
    transform: scale(0.9);
}
.animated-item.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
}


/* ------------------- */
/* RESPONSIVENESS      */
/* ------------------- */
@media (max-width: 768px) {
    :root {
        --section-padding: 80px 0;
    }
    
    /* Mobile Navigation */
    .nav-links {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        position: fixed;
        top: 0;
        right: -100%;
        width: 100%;
        height: 100vh;
        background-color: var(--color-bg-secondary);
        transition: right var(--transition-speed) ease-in-out;
        z-index: 999;
    }
    .nav-links.active {
        right: 0;
    }
    .nav-links li {
        margin: 20px 0;
    }
    .nav-links a {
        font-size: 1.5rem;
    }
    #mobile-menu-toggle {
        display: block;
        z-index: 1001;
    }
    #mobile-menu-toggle.is-active svg path {
        d: path("M6 18L18 6M6 6l12 12");
    }

    /* Sections */
    .about-grid {
        grid-template-columns: 1fr;
    }
    .download-container {
        flex-direction: column;
        text-align: center;
    }
    .download-buttons {
        flex-direction: column;
        width: 100%;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-about .logo {
        justify-content: center;
    }
    .social-icons {
        justify-content: center;
    }
}