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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

.theme-dark {
    background: radial-gradient(circle at top left, #1a1e30, #0d0f1a);
    background-attachment: fixed;
}

.app-container {
    max-width: 480px;
    /* Mobile first premium UI target */
    margin: 0 auto;
    min-height: 100vh;
    padding: var(--space-6) var(--space-4) var(--space-8);
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    position: relative;
}

/* Typography Helpers */
.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
}

.text-gradient-success {
    background: var(--gradient-success);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-gradient-warning {
    background: var(--gradient-warning);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.text-gradient-danger {
    background: var(--gradient-danger);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Header Elements */
.header {
    text-align: center;
    margin-bottom: var(--space-2);
    animation: fade-in-down 0.8s var(--transition-bounce);
}

.header__title {
    font-size: var(--text-2xl);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-2);
}

.header__subtitle {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    flex: 1;
}

.footer {
    margin-top: auto;
    padding-top: var(--space-6);
    text-align: center;
}

.footer__notice {
    margin-top: var(--space-4);
    font-size: var(--text-xs);
    color: var(--text-tertiary);
}

/* Animations */
@keyframes fade-in-down {
    0% {
        opacity: 0;
        transform: translateY(-20px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fade-in-up {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.5;
    }
}