/* Iron Wall Architecture - Shared Theme & Layout */
:root {
    --primary-red: #DE2A2A;
    --primary-red-glow: rgba(222, 42, 42, 0.4);
    --bg-dark: #050505;
    --bg-gradient: radial-gradient(circle at 50% 0%, #1a1a1a 0%, #050505 100%);
    --card-bg: rgba(255, 255, 255, 0.04);
    --glass-bg: rgba(255, 255, 255, 0.02);
    --border-light: rgba(255, 255, 255, 0.08);
    --border-silk: rgba(255, 255, 255, 0.12);
    --font-sans: 'Montserrat', sans-serif;
    --font-serif: 'Crimson Pro', serif;
}

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

body {
    background: var(--bg-dark);
    background-image: var(--bg-gradient);
    background-attachment: fixed;
    color: #FFFFFF;
    font-family: var(--font-sans);
    overflow-x: hidden;
    line-height: 1.6;
    min-height: 100vh;
}

.app-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 1.5rem;
    position: relative;
    z-index: 10;
}

header {
    text-align: center;
    margin-bottom: 1rem;
}

#logo {
    height: 60px;
    margin-bottom: 1rem;
    filter: drop-shadow(0 0 20px rgba(222, 42, 42, 0.2));
}

/* Tab Navigation */
.tab-navigation {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    background: var(--glass-bg);
    backdrop-filter: blur(15px);
    border: 1px solid var(--border-light);
    border-radius: 50px;
    padding: 0.5rem;
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.tab-btn {
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.3);
    font-family: var(--font-sans);
    font-weight: 700;
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    padding: 0.8rem 2rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 40px;
    position: relative;
}

.tab-btn:hover {
    color: #FFFFFF;
    background: rgba(255, 255, 255, 0.05);
}

.tab-btn.active {
    color: #FFFFFF;
    background: var(--primary-red);
    box-shadow: 0 10px 20px rgba(222, 42, 42, 0.3);
}

.section-content {
    display: none;
    animation: fadeIn 0.5s ease both;
}

.section-content.active {
    display: block;
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }

/* Ambient Background FX */
.bg-glow-container {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.bg-glow-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(222, 42, 42, 0.15) 0%, transparent 70%);
    filter: blur(80px);
    animation: floatGlow 20s infinite alternate ease-in-out;
}

.orb-1 {
    top: -10%;
    left: -10%;
    animation-duration: 25s;
}

.orb-2 {
    bottom: -10%;
    right: -10%;
    background: radial-gradient(circle, rgba(222, 42, 42, 0.12) 0%, transparent 70%);
    animation-duration: 35s;
    animation-delay: -5s;
}

@keyframes floatGlow {
    0% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(10vw, 15vh) scale(1.1); }
    66% { transform: translate(-5vw, 25vh) scale(0.9); }
    100% { transform: translate(5vw, -5vh) scale(1); }
}

/* Global Utilities */
.hidden { display: none !important; }