/**
 * InnoSource Technology - Main Stylesheet
 * Modern, minimal, AI-era design
 */

/* CSS Variables - Brand Colors */
:root {
    --color-bg-dark: #0d2c40;
    --color-bg-darker: #021f2f;
    --color-bg-light: #1a3a52;
    --color-accent: #00d56f;
    --color-accent-hover: #00ff80;
    --color-text-primary: #ffffff;
    --color-text-secondary: #a9bbc8;
    --color-text-muted: #6b7d8a;
    --color-border: #1a3a52;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    background: var(--color-bg-darker);
    color: var(--color-text-primary);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

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

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Sections */
section {
    padding: var(--spacing-xl) 0;
}

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

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

/* Header */
header {
    position: sticky;
    top: 0;
    z-index: 1002;
    background: rgba(13, 44, 64, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo img {
    height: 40px;
    width: auto;
    max-width: 180px;
}

nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

nav a {
    color: var(--color-text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover {
    color: var(--color-accent);
}

/* Desktop Navigation */
.desktop-nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.desktop-nav > ul > li {
    position: relative;
}

.desktop-nav .has-dropdown {
    position: relative;
}

.desktop-nav .dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--color-bg-dark);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    min-width: 250px;
    padding: var(--spacing-xs) 0;
    margin-top: 0.5rem;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    flex-direction: column;
    gap: 0;
}

.desktop-nav .has-dropdown:hover .dropdown {
    display: flex;
}

.desktop-nav .dropdown li {
    width: 100%;
}

.desktop-nav .dropdown a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-sm);
    white-space: nowrap;
}

.desktop-nav .dropdown a:hover {
    background: rgba(0, 213, 111, 0.1);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    position: relative;
    z-index: 1003;
}

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* Mobile Navigation - SIMPLE VERSION */
.mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--color-bg-darker);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 1000;
    padding: 15px;
    max-height: calc(100vh - 70px);
}

.mobile-nav.active {
    display: block;
}

.mobile-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: block;
}

.mobile-nav > ul > li {
    display: block;
    width: 100%;
    border-bottom: 1px solid rgba(0, 213, 111, 0.1);
}

.mobile-nav > ul > li > a,
.mobile-nav > ul > li > .mobile-dropdown-toggle {
    display: block;
    padding: 12px 0;
    color: var(--color-text-primary);
    font-size: 1rem;
    text-decoration: none;
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-weight: 500;
}

.mobile-nav > ul > li > a:hover,
.mobile-nav > ul > li > .mobile-dropdown-toggle:hover {
    color: var(--color-accent);
}

.mobile-nav .has-dropdown > .mobile-dropdown-toggle::after {
    content: ' ▼';
    font-size: 0.75rem;
    color: var(--color-accent);
}

.mobile-nav .has-dropdown.active > .mobile-dropdown-toggle::after {
    content: ' ▲';
}

.mobile-nav .mobile-dropdown {
    display: none;
    padding-left: 15px;
    background: rgba(0, 213, 111, 0.03);
    padding-top: 5px;
    padding-bottom: 5px;
}

.mobile-nav .has-dropdown.active .mobile-dropdown {
    display: block;
}

.mobile-nav .mobile-dropdown a {
    display: block;
    padding: 10px 0;
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    text-decoration: none;
}

.mobile-nav .mobile-dropdown a:hover {
    color: var(--color-accent);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 14px 32px;
    background: var(--color-accent);
    color: #0a1628;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn:hover {
    background: var(--color-accent-hover);
    color: #0a1628;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 213, 111, 0.3);
}

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

.btn-secondary:hover {
    background: var(--color-accent);
    color: #0a1628 !important;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 213, 111, 0.3);
}

.btn-large {
    padding: 18px 40px;
    font-size: 18px;
}

/* Hero Section */
.hero {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.hero p {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-lg);
}

.hero-cta {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* Cards */
.card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all 0.3s ease;
}

.card:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-accent);
    transform: translateY(-4px);
}

.card h3 {
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.card p {
    color: var(--color-text-secondary);
}

/* Grid */
.grid {
    display: grid;
    gap: var(--spacing-md);
}

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

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

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

/* Forms */
form {
    max-width: 600px;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--color-text-secondary);
}

input, textarea, select {
    width: 100%;
    padding: 14px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    font-family: inherit;
    font-size: 16px;
    transition: all 0.3s ease;
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--color-accent);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(0, 213, 111, 0.1);
}

/* Fix dropdown options visibility */
select option {
    background: var(--color-bg-dark);
    color: var(--color-text-primary);
    padding: 12px;
}

select option:hover,
select option:focus,
select option:checked {
    background: var(--color-accent);
    color: #0a1628;
}

textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
footer {
    background: var(--color-bg-darker);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-main {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-brand {
    max-width: 350px;
}

.footer-logo {
    height: 40px;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.footer-cta {
    margin-top: var(--spacing-md);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.footer-column h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-primary);
    font-size: 1rem;
    font-weight: 600;
}

.footer-column ul {
    list-style: none;
}

.footer-column li {
    margin-bottom: var(--spacing-xs);
}

.footer-column a {
    color: var(--color-text-secondary);
    transition: color 0.3s ease;
    font-size: 0.95rem;
}

.footer-column a:hover {
    color: var(--color-accent);
}

.footer-contact {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-contact a {
    color: var(--color-accent);
    font-weight: 500;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }

/* Content List */
.content-list {
    list-style: none;
    padding-left: 0;
}

.content-list li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
}

.content-list li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }

    .hero h1 { font-size: 2.5rem; }

    .grid-2, .grid-3 {
        grid-template-columns: 1fr !important;
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: var(--spacing-md);
    }


    /* Footer Mobile */
    .footer-main {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-brand {
        max-width: 100%;
        text-align: center;
    }

    .footer-logo {
        margin: 0 auto var(--spacing-sm);
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }

    .footer-column {
        text-align: left;
    }

    /* Hide desktop nav, show mobile toggle */
    .desktop-nav {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    /* Ensure logo is visible on mobile */
    .logo {
        display: block !important;
        z-index: 1003;
        flex-shrink: 0;
    }

    .logo a {
        display: flex !important;
        align-items: center;
    }

    .logo img {
        height: 32px !important;
        width: auto;
        max-width: 150px;
        display: block !important;
    }

    .header-content {
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
    }

    section {
        padding: var(--spacing-lg) 0;
    }

    /* Container padding adjustment */
    .container {
        padding: 0 var(--spacing-sm);
    }

    /* Form adjustments */
    input, textarea, select {
        font-size: 16px;
    }
}

/* Extra small screens (iPhone SE, etc) */
@media (max-width: 390px) {
    .logo img {
        height: 28px !important;
        max-width: 130px;
    }

    .mobile-menu-toggle {
        padding: 6px;
    }

    .grid-4 {
        gap: var(--spacing-sm);
    }
}

/* Loading State */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-darker);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preloader.loaded {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}