/*
 * ============================================================================
 * JOSHUA STRINGER - PORTFOLIO WEBSITE
 * ============================================================================
 *
 * Copyright (c) 2025 Joshua Stringer. All rights reserved.
 *
 * This source code and design are the intellectual property of Joshua Stringer.
 * Unauthorized copying, modification, distribution, or use of this code,
 * design, or any derivative works is strictly prohibited without explicit
 * written permission from the author.
 *
 * Contact: josh.stringer62@gmail.com
 * Website: linkedin.com/in/josh-stringer
 *
 * ============================================================================
 */

/* ===================
   CSS Variables
   =================== */
:root {
    /* Base palette */
    --bg-base: #0c0c10;
    --bg-elevated: #141419;
    --bg-card: #1a1a21;
    --bg-subtle: #22222b;

    /* Borders */
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-default: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.18);
    --border-strong: rgba(255, 255, 255, 0.15);

    /* Text */
    --text-primary: #f4f4f6;
    --text-secondary: #a0a0b0;
    --text-tertiary: #6b6b7a;
    --text-muted: #4a4a58;

    /* Semantic colors */
    --accent: #4ecb8d;
    --accent-dim: rgba(78, 203, 141, 0.15);
    --ai-color: #6b9fff;
    --ai-dim: rgba(107, 159, 255, 0.15);
    --human-color: #e8a84c;
    --human-dim: rgba(232, 168, 76, 0.15);
    --negative: #e85c5c;
    --negative-dim: rgba(232, 92, 92, 0.15);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
}

/* ===================
   Navigation
   =================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(12, 12, 16, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
}

.nav-logo {
    font-weight: 700;
    font-size: 18px;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

/* Nav Dropdown */
.nav-dropdown {
    position: relative;
}

.nav-dropdown > a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.nav-dropdown > a::after {
    content: '\25BE';
    font-size: 10px;
    opacity: 0.6;
    margin-top: 1px;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: -16px;
    margin-top: 12px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-default);
    border-radius: 12px;
    padding: 8px;
    min-width: 240px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.15s ease;
}

.dropdown-menu a:hover {
    background: var(--bg-card);
    color: var(--text-primary);
}

.dropdown-menu .dropdown-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-muted);
    display: block;
    margin-top: 4px;
}

/* Nav CTA Button */
.nav-cta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent);
    background: var(--accent-dim);
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    transition: all 0.2s ease;
}

.nav-cta:hover {
    background: rgba(78, 203, 141, 0.25);
}

/* Nav Back Link (for case study pages) */
.nav-back {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* ===================
   Mobile Menu Toggle
   =================== */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

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

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

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ===================
   Mobile Menu
   =================== */
.mobile-menu {
    display: none;
    position: fixed;
    top: 73px;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-default);
    padding: 16px 24px 24px;
    z-index: 99;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.mobile-menu.active {
    opacity: 1;
    transform: translateY(0);
}

.mobile-menu a {
    display: block;
    padding: 14px 0;
    font-size: 16px;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid var(--border-subtle);
    transition: color 0.2s ease;
}

.mobile-menu a:last-child {
    border-bottom: none;
}

.mobile-menu a:hover {
    color: var(--text-primary);
}

.mobile-menu .mobile-dropdown-label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 10px;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--text-muted);
    display: block;
    margin-top: 2px;
}

/* ===================
   Footer
   =================== */
.footer {
    padding: 40px;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
}

.footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
}

.footer-links a {
    font-size: 14px;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.footer-copy {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.footer-copyright {
    font-size: 12px;
    color: var(--text-muted);
    opacity: 0.7;
}

/* ===================
   Common Buttons
   =================== */
.btn-primary {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 15px;
    font-weight: 600;
    color: var(--bg-base);
    background: var(--accent);
    padding: 14px 28px;
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    background: #5dd89a;
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(78, 203, 141, 0.3);
}

.btn-secondary {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--border-default);
    padding: 14px 28px;
    border-radius: 10px;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-secondary:hover {
    border-color: var(--border-hover);
    background: var(--bg-subtle);
}

/* ===================
   Footer CTA Section
   =================== */
.footer-cta {
    padding: 140px 40px;
    text-align: center;
    background: var(--bg-elevated);
    border-top: 1px solid var(--border-subtle);
}

.footer-cta-inner {
    max-width: 650px;
    margin: 0 auto;
}

.footer-cta h2 {
    font-size: 52px;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 20px;
    line-height: 1.1;
}

.footer-cta p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

/* ===================
   Site Footer (for case study pages)
   =================== */
.site-footer {
    padding: 40px;
    border-top: 1px solid var(--border-subtle);
    text-align: center;
    background: var(--bg-base);
    max-width: 1200px;
    margin: 60px auto 0;
}

.site-footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 24px;
}

.site-footer-links a {
    font-size: 14px;
    color: var(--text-tertiary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.site-footer-links a:hover {
    color: var(--text-primary);
}

.site-footer-copy {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.site-footer-copyright {
    font-size: 12px;
    color: var(--text-muted);
    opacity: 0.7;
}

/* ===================
   Mobile Responsive - Navigation
   =================== */
@media (max-width: 900px) {
    .nav {
        padding: 16px 24px;
    }

    .nav-links {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .nav-cta {
        display: none;
    }

    .nav-back {
        display: none;
    }

    .footer-cta {
        padding: 100px 24px;
    }

    .footer-cta h2 {
        font-size: 36px;
        letter-spacing: -1px;
    }

    .footer-cta p {
        font-size: 18px;
        margin-bottom: 32px;
    }
}

/* ===================
   Print Watermark
   =================== */
@media print {
    body::before {
        content: "© 2025 Joshua Stringer • josh.stringer62@gmail.com • All Rights Reserved";
        position: fixed;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%) rotate(-45deg);
        font-size: 48px;
        font-weight: 700;
        color: rgba(78, 203, 141, 0.08);
        white-space: nowrap;
        pointer-events: none;
        z-index: 9999;
    }

    body::after {
        content: "CONFIDENTIAL - Property of Joshua Stringer";
        position: fixed;
        bottom: 20px;
        left: 0;
        right: 0;
        text-align: center;
        font-size: 10px;
        color: rgba(0, 0, 0, 0.3);
        z-index: 9999;
    }
}