* {
    font-family: 'Inter', sans-serif;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.3s, color 0.3s;
}

body {
    background-color: #f0f4f8;
    overflow: hidden;
}

@keyframes bubblePop {
    0% { opacity: 0; transform: scale(0.95) translateY(10px); }
    100% { opacity: 1; transform: scale(1) translateY(0); }
}

@keyframes gradientFlow {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.page {
    display: none;
    animation: bubblePop 0.3s ease-out;
    will-change: transform, opacity;
}

.active-page {
    display: block;
}

.hide-scrollbar::-webkit-scrollbar {
    display: none;
}

.app-shell {
    max-width: 100%;
    margin: 0 auto;
    background: #ffffff;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

@media (min-width: 768px) {
    .app-shell {
        max-width: 850px;
        margin: 2vh auto;
        height: 96vh;
        border-radius: 3rem;
        box-shadow: 0 40px 80px -15px rgba(0,0,0,0.15);
    }
}

.auth-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 0;
    background: linear-gradient(-45deg, #0f172a, #1e3a8a, #312e81, #1e40af);
    background-size: 400% 400%;
    animation: gradientFlow 15s ease infinite;
}

.auth-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0,0,0,0.2);
    z-index: 1;
}

.auth-content-box {
    position: relative;
    z-index: 10;
    background: white;
    border-radius: 35px 35px 0 0;
    padding: 40px 30px;
    margin-top: auto;
    box-shadow: 0 -10px 40px rgba(0,0,0,0.2);
}

.auth-input {
    border-radius: 1.2rem;
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 18px 22px;
    font-size: 1rem;
    transition: all 0.2s;
}

.auth-input:focus {
    border-color: #1e3a8a;
    background: white;
    box-shadow: 0 0 0 4px rgba(30, 58, 138, 0.1);
    outline: none;
}

.toggle-btn-active {
    color: #1e3a8a !important;
}

.toggle-btn-inactive {
    color: white !important;
}

#toggle-bg {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.cat-item.active {
    background: #eff6ff;
    border-color: #3b82f6;
    color: #1d4ed8;
}

#side-drawer {
    position: fixed;
    inset: 0;
    z-index: 500;
    display: none;
    background: rgba(0,0,0,0.5);
}

#drawer-content {
    width: 280px;
    height: 100%;
    background: white;
    position: relative;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
}

#side-drawer.open {
    display: block;
}

#side-drawer.open #drawer-content {
    transform: translateX(0);
}

#scroll-area {
    scroll-behavior: smooth;
}

.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,0.8);
    z-index: 9999;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.loading-overlay.active {
    display: flex;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid #e2e8f0;
    border-top: 5px solid #1e3a8a;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Hide number input arrows */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

/* Fix for iOS input styling */
input,
textarea,
select {
    appearance: none;
    -webkit-appearance: none;
    border-radius: 1.2rem;
}

/* PWA specific enhancements */
@media all and (display-mode: standalone) {
    .app-shell {
        border-radius: 0 !important;
        margin: 0 !important;
        height: 100vh !important;
        max-width: 100% !important;
    }
}