:root {
    --bg: #f8fafc;
    --bg-panel: #ffffff;
    --panel: #ffffff;
    --panel-2: #f1f5f9;
    --panel-3: #e2e8f0;
    --border: #e2e8f0;
    --border-soft: #cbd5e1;
    --text: #0f172a;
    --muted: #64748b;
    --primary: #0ea5e9;
    --primary-2: #38bdf8;
    --primary-3: #0284c7;
    --accent: #10b981;
    --radius: 12px;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);

    /* Hamburger Button - Shared Variables */
    --hamburger-gap: 5px;
    --hamburger-padding: 8px;
    --hamburger-bar-width: 24px;
    --hamburger-bar-height: 2px;
    --hamburger-bar-radius: 2px;
    --hamburger-transition: all 0.3s ease;
    --hamburger-rotate-x: 5px;
    --hamburger-rotate-y: 5px;
}
* { box-sizing: border-box; }
html, body {
    overflow-x: hidden;
    overscroll-behavior-x: none;
}
body {
    margin: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ========== HEADER MODERNO ========== */
header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-3) 100%);
    box-shadow: 0 2px 12px rgba(14, 165, 233, 0.25);
}
.header-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 20px;
    color: #fff;
}
.brand-mark {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

/* Mobile Menu Button - Uses shared hamburger variables */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: var(--hamburger-gap);
    padding: var(--hamburger-padding);
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 100;
}
.mobile-menu-btn span {
    display: block;
    width: var(--hamburger-bar-width);
    height: var(--hamburger-bar-height);
    background: #fff;
    border-radius: var(--hamburger-bar-radius);
    transition: var(--hamburger-transition);
    transform-origin: center;
}
.mobile-menu-btn.is-open span:nth-child(1) {
    transform: rotate(45deg) translate(var(--hamburger-rotate-x), var(--hamburger-rotate-y));
}
.mobile-menu-btn.is-open span:nth-child(2) {
    opacity: 0;
}
.mobile-menu-btn.is-open span:nth-child(3) {
    transform: rotate(-45deg) translate(var(--hamburger-rotate-x), calc(var(--hamburger-rotate-y) * -1));
}

/* Navigation */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-link {
    padding: 8px 16px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    border-radius: 8px;
    transition: all 0.2s;
}
.nav-link:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}
.nav-link.btn-cta {
    background: #fff;
    color: var(--primary-3);
    font-weight: 600;
}
.nav-link.btn-cta:hover {
    background: rgba(255, 255, 255, 0.9);
}
.user-badge {
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 20px;
    font-size: 13px;
    color: #fff;
    font-weight: 500;
}
.nav-divider {
    width: 1px;
    height: 24px;
    background: rgba(255, 255, 255, 0.2);
    margin: 0 4px;
}

/* Responsive */
@media (max-width: 768px) {
    .mobile-menu-btn { display: flex; }
    .nav-divider { display: none; }

    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(180deg, var(--primary) 0%, var(--primary-3) 100%);
        flex-direction: column;
        padding: 24px 20px;
        gap: 8px;
        align-items: stretch;
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
    }
    .nav-menu.is-open {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }
    .nav-link {
        width: 100%;
        padding: 16px 20px;
        text-align: left;
        font-size: 16px;
        border-radius: 12px;
    }
    .nav-link:hover,
    .nav-link:active {
        background: rgba(255, 255, 255, 0.15);
    }
    .nav-link.btn-cta {
        margin-top: 16px;
        text-align: center;
        padding: 16px 24px;
    }
    .user-badge {
        padding: 16px 20px;
        text-align: center;
        font-size: 15px;
        margin-bottom: 8px;
        border-radius: 12px;
    }
}

/* Extra small screens */
@media (max-width: 425px) {
    .header-inner {
        padding: 0 12px;
        height: 56px;
    }
    .brand {
        font-size: 16px;
        gap: 8px;
    }
    .brand-mark {
        width: 28px;
        height: 28px;
    }
    .nav-menu {
        top: 56px;
        padding: 16px 12px;
    }
    .container {
        padding: 0 12px 40px;
    }
}

@media (max-width: 360px) {
    .header-inner {
        height: 52px;
    }
    .brand {
        font-size: 14px;
    }
    .brand-mark {
        width: 24px;
        height: 24px;
    }
    .nav-menu {
        top: 52px;
    }
}

/* ========== CONTENT ========== */
.container { max-width: 1240px; margin: 0 auto; padding: 0 20px 54px; }
.card {
    background: var(--panel);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 24px;
}
.card-ghost {
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.15s ease;
    color: var(--text);
    background: var(--panel);
}
.btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.btn-primary {
    background: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(14, 165, 233, 0.25);
}
.btn-ghost { background: transparent; border-color: transparent; }
.btn:hover { border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-3); box-shadow: 0 4px 12px rgba(14, 165, 233, 0.35); }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-secondary {
    background: var(--panel-2);
    border-color: var(--border);
}
.btn-secondary:hover {
    background: var(--panel-3);
}

/* ========== FOOTER ========== */
footer {
    margin-top: 48px;
    padding: 28px 0 40px;
    color: var(--muted);
    border-top: 1px solid var(--border);
    background: var(--panel);
}
.footer-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: space-between;
    align-items: center;
}
@media (max-width: 600px) {
    .footer-inner {
        flex-direction: column;
        text-align: center;
    }
}