/**
 * layout.css — App Shell & Navigation Structure
 * Header, tab-nav, main content area, footer, sticky wrappers.
 */

/* ============================================
   APP HEADER
   ============================================ */
.app-header {
    background-color: var(--bg-card);
    padding: 10px var(--spacing-md) 8px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: transform 0.3s ease;
}

.app-header.hide {
    transform: translateY(-100%);
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-container {
    width: 40px;
    height: 40px;
    background: transparent !important;
    border-radius: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.app-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    background-color: transparent !important;
}

/* ============================================
   TAB NAVIGATION
   ============================================ */
/* ============================================
   TAB NAVIGATION (BOTTOM CONVEX BAR ON MOBILE)
   ============================================ */
.tab-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-around;
    align-items: center;
    background-color: var(--bg-card);
    padding: 6px 8px 10px 8px;
    /* Extra bottom padding for mobile safe area */
    border-top: 1px solid var(--border-color);
    border-bottom: none;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
    height: 66px;
    box-sizing: border-box;
    overflow: visible;
}


/* Global active tab state — propagates to all shadows */
:root:has(.tab-btn[data-tab="dashboard"].active) {
    --active-tab-glow: var(--primary);
}

:root:has(.tab-btn[data-tab="manual"].active) {
    --active-tab-glow: var(--primary);
}

:root:has(.tab-btn[data-tab="ai"].active) {
    --active-tab-glow: var(--secondary);
}

:root:has(.tab-btn[data-tab="history"].active) {
    --active-tab-glow: var(--tertiary);
}

:root:has(.tab-btn[data-tab="finance"].active) {
    --active-tab-glow: var(--finance-green);
}

.tab-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: transparent !important;
    border: none !important;
    padding: 2px 0 4px 0 !important;
    font-size: 0.65rem !important;
    color: var(--text-muted) !important;
    cursor: pointer;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: visible !important;
    font-weight: 400 !important;
    /* Thin by default for inactive */
    gap: 4px;
    height: 100%;
    border-radius: 0 !important;
    box-shadow: none !important;
    -webkit-tap-highlight-color: transparent;
}

/* Active states for mobile bottom nav (tab-nav) - clean black/bold active look */
.tab-nav .tab-btn.active:not(.tab-btn-ai) {
    background: transparent !important;
    border: none !important;
    color: #000000 !important;
    /* Active text color is black */
    font-weight: 700 !important;
    /* Active text is bold */
    box-shadow: none !important;
}

[data-theme="dark"] .tab-nav .tab-btn.active:not(.tab-btn-ai) {
    color: #ffffff !important;
    /* Active is white in dark theme */
}

.tab-nav .tab-btn i-ui {
    transition: color 0.25s ease;
    color: var(--text-muted) !important;
    /* Inactive is gray */
}

.tab-nav .tab-btn.active:not(.tab-btn-ai) i-ui {
    color: #000000 !important;
    /* Active icon color is black */
    transform: none !important;
    /* No zoom/scale animation on click */
}

[data-theme="dark"] .tab-nav .tab-btn.active:not(.tab-btn-ai) i-ui {
    color: #ffffff !important;
    /* Active is white in dark theme */
}

/* Center AI Button Raised Layout */
.tab-btn-ai-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    position: relative;
    height: 100%;
    overflow: visible;
    z-index: 1001;
}

/* Register Houdini properties for premium smooth animated mesh gradient */
@property --c-0 {
    syntax: '<color>';
    inherits: false;
    initial-value: hsla(190, 100%, 88%, 0.66)
}

@property --s-start-0 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 4.038772213247173%
}

@property --s-end-0 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 37.2265767974114%
}

@property --y-0 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 11%
}

@property --x-0 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 91%
}

@property --c-1 {
    syntax: '<color>';
    inherits: false;
    initial-value: hsla(136, 100%, 88%, 1)
}

@property --x-1 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 69.11764778558965%
}

@property --y-1 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 54.30547154879501%
}

@property --s-start-1 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 3%
}

@property --s-end-1 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 56%
}

@property --c-2 {
    syntax: '<color>';
    inherits: false;
    initial-value: hsla(280, 64%, 64%, 1)
}

@property --y-2 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 87%
}

@property --s-start-2 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 12.107536057085522%
}

@property --s-end-2 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 63.33640956108327%
}

@property --x-2 {
    syntax: '<percentage>';
    inherits: false;
    initial-value: 36%
}

/* Mesh animation keyframes */
@keyframes ani-tab-btn-ai {
    0% {
        --c-0: hsla(190, 100%, 88%, 0.66);
        --s-start-0: 4.038772213247173%;
        --s-end-0: 37.2265767974114%;
        --y-0: 11%;
        --x-0: 91%;
        --c-1: hsla(136, 100%, 88%, 1);
        --x-1: 69.11764778558965%;
        --y-1: 54.30547154879501%;
        --s-start-1: 3%;
        --s-end-1: 56%;
        --c-2: hsla(280, 64%, 64%, 1);
        --y-2: 87%;
        --s-start-2: 12.107536057085522%;
        --s-end-2: 63.33640956108327%;
        --x-2: 36%;
    }

    100% {
        --c-0: hsla(190, 84%, 69%, 0.66);
        --s-start-0: 3%;
        --s-end-0: 56%;
        --y-0: 92%;
        --x-0: 94%;
        --c-1: hsla(136, 100%, 72%, 1);
        --x-1: 53.71148564984649%;
        --y-1: 40.953546619049796%;
        --s-start-1: 3%;
        --s-end-1: 56%;
        --c-2: hsla(280, 100%, 88%, 1);
        --y-2: 24.02200177863751%;
        --s-start-2: 18%;
        --s-end-2: 56%;
        --x-2: 28.422618506987362%;
    }
}

/* The actual circular button (floating, standing completely alone, with animated mesh gradient) */
.tab-btn-ai {
    position: absolute;
    top: -24px;
    left: 50%;
    transform: translateX(-50%);
    width: 66px;
    height: 66px;
    border-radius: 50% !important;
    color: #444444 !important;
    /* Dark charcoal icon color for high contrast on pastels */
    display: flex !important;
    align-items: center;
    justify-content: center;
    border: 1.5px solid var(--bg-card) !important;
    z-index: 1002;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    padding: 0 !important;
    box-sizing: border-box;

    /* Animated Mesh Gradient Styles */
    --c-0: hsla(190, 100%, 88%, 0.66);
    --y-0: 11%;
    --x-0: 91%;
    --c-1: hsla(136, 100%, 88%, 1);
    --x-1: 69.11764778558965%;
    --y-1: 54.30547154879501%;
    --c-2: hsla(280, 64%, 64%, 1);
    --y-2: 87%;
    --x-2: 36%;
    background-color: hsla(0, 0%, 100%, 0.77) !important;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 623 623' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E"), radial-gradient(circle at var(--x-0) var(--y-0), var(--c-0) var(--s-start-0), transparent var(--s-end-0)), radial-gradient(circle at var(--x-1) var(--y-1), var(--c-1) var(--s-start-1), transparent var(--s-end-1)), radial-gradient(circle at var(--x-2) var(--y-2), var(--c-2) var(--s-start-2), transparent var(--s-end-2)) !important;
    animation: ani-tab-btn-ai 2s linear infinite alternate;
    background-blend-mode: overlay, normal, normal, normal;
    will-change: transform, opacity;
    contain: paint;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1) !important;
}

/* Active AI center button - faster animation (0.8s) & 20% dimmer (brightness(0.8)) */
.tab-btn-ai.active {
    animation: ani-tab-btn-ai 0.8s linear infinite alternate !important;
    /* 2.5x faster animation speed */
    /* Dimmed by exactly 20% */
    transform: translateX(-50%) scale(1.08) translateY(-3px);
}

.tab-btn-ai i-ui {
    color: #444444 !important;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tab-btn-ai.active i-ui {
    color: #111111 !important;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */
#app-content {
    flex: 1;
    padding: var(--spacing-md);
    padding-bottom: 80px;
    max-width: 600px;
    margin: 0 auto;
    width: 100%;
}

/* History view breaks out full-bleed */
#history-view {
    margin-left: calc(-1 * var(--spacing-md));
    margin-right: calc(-1 * var(--spacing-md));
}

/* ============================================
   FOOTER
   ============================================ */
.app-footer {
    text-align: center;
    padding: var(--spacing-lg);
    background: #333;
    color: #fff;
    margin-top: auto;
    font-size: 0.8rem;
}