/* ========================================
   📦 LAYOUT
   ======================================== */
main {
    padding-top: 60px;
    padding-bottom: env(safe-area-inset-bottom);
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

@media (min-width: 768px) {
    main { padding-top: calc(70px + var(--space-xl)); }
}

.container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 var(--space-md);
    padding-left: max(var(--space-md), env(safe-area-inset-left));
    padding-right: max(var(--space-md), env(safe-area-inset-right));
}

@media (min-width: 768px) {
    .container { padding: 0 var(--space-lg); }
}

@media (min-width: 1280px) {
    .container { max-width: 1400px; }
}

/* ========================================
   🧭 NAVIGATION
   ======================================== */
header {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 60px;
    background: rgba(15, 23, 41, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: transform var(--transition-base);
}

@media (min-width: 768px) {
    header { height: 70px; }
}

header .container {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    font-size: var(--text-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: transform var(--transition-base);
}

@media (min-width: 768px) {
    .brand { font-size: var(--text-2xl); }
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.mobile-menu-toggle span {
    width: 100%;
    height: 3px;
    background: var(--color-text);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.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, -6px); }

@media (min-width: 768px) {
    .mobile-menu-toggle { display: none; }
}

/* Navigation Menu */
.navbar { display: none; }

@media (max-width: 767px) {
    .navbar {
        position: fixed;
        top: 60px; left: 0; right: 0; bottom: 0;
        background: rgba(15, 23, 41, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: var(--space-lg);
        display: flex;
        flex-direction: column;
        gap: var(--space-md);
        transform: translateX(100%);
        transition: transform var(--transition-base);
    }

    .navbar.show { transform: translateX(0); }

    .nav-base {
        padding: var(--space-md) var(--space-lg);
        font-size: var(--text-lg);
        width: 100%;
        text-align: left;
        border-radius: var(--radius-md);
    }
}

@media (min-width: 768px) {
    .navbar {
        display: flex;
        gap: var(--space-xs);
        align-items: center;
    }

    .nav-base {
        padding: var(--space-sm) var(--space-md);
        color: var(--color-text-muted);
        text-decoration: none;
        border-radius: var(--radius-md);
        transition: all var(--transition-base);
        position: relative;
        font-weight: 500;
    }

    .nav-base:hover {
        color: var(--color-text);
        background: rgba(124, 139, 255, 0.1);
    }
}

.nav-active {
    color: var(--color-primary);
    background: rgba(124, 139, 255, 0.15);
}

/* ========================================
   🎯 PAGE-SPECIFIC STYLES
   ======================================== */

/* Page headers */
.page-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 2px solid var(--color-border);
}

@media (min-width: 768px) {
    .page-header {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        margin-bottom: var(--space-2xl);
    }
}

.page-header h1 {
    margin: 0;
    font-size: var(--text-2xl);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

@media (min-width: 768px) {
    .page-header h1 { font-size: 2.5rem; }
}

/* Control bar */
.control-bar {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
    .control-bar {
        flex-direction: row;
        justify-content: space-between;
        align-items: flex-start;
        margin-bottom: var(--space-xl);
        flex-wrap: wrap;
        gap: var(--space-lg);
    }
}

.control-bar .title {
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

@media (min-width: 768px) {
    .control-bar .title {
        font-size: 2rem;
        gap: var(--space-md);
    }
}

/* Instrument filters */
.instrument-filters {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

@media (min-width: 768px) {
    .instrument-filters {
        flex-direction: row;
        flex-wrap: wrap;
        align-items: flex-end;
        margin-bottom: var(--space-xl);
    }
}

/* Breakdown list */
.breakdown-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.breakdown-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm);
    margin-bottom: var(--space-xs);
    background: rgba(124, 139, 255, 0.05);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--color-accent);
    transition: all var(--transition-fast);
    font-size: var(--text-sm);
}

@media (min-width: 768px) {
    .breakdown-list li {
        font-size: var(--text-base);
    }

    .breakdown-list li:hover {
        background: rgba(124, 139, 255, 0.1);
        transform: translateX(5px);
    }
}

/* Footer */
.footer {
    margin-top: var(--space-xl);
    padding: var(--space-lg) var(--space-md);
    text-align: center;
    color: var(--color-text-muted);
    border-top: 1px solid var(--color-border);
    font-size: var(--text-xs);
    padding-bottom: calc(var(--space-lg) + env(safe-area-inset-bottom));
}

@media (min-width: 768px) {
    .footer {
        margin-top: var(--space-2xl);
        padding: var(--space-xl) 0;
        font-size: var(--text-sm);
    }
}